30th United States Congress



The Thirtieth United States Congress was a meeting of the legislative branch of the United States federal government, consisting of the United States Senate and the United States House of Representatives. It met in Washington, D.C. from March 4, 1847 to March 3, 1849, during the last two years of the administration of U.S. President James K. Polk.

The apportionment of seats in this House of Representatives was based on the Sixth Census of the United States in 1840. The Senate had a Democratic majority, and the House had a Whig majority.

Dates of sessions
March 4, 1847 - March 3, 1849
 * First session: December 6, 1847 - August 14, 1848.
 * Second session: December 4, 1848 - March 3, 1849.
 * Previous congress: 29th Congress
 * Next congress: 31st Congress

Party summary
Wisconsin was newly admitted to the Union and first represented as a state in this Congress.

The count below identifies party affiliations at the beginning of the first session of this Congress, and includes members from vacancies and newly admitted states, when they were first seated. Changes resulting from subsequent replacements are shown below in the "Changes in membership" section.

Major events
Events of 1847, 1848 & 1849

Major legislation
List of United States federal legislation in the 30th Congress
 * May 29, 1848 -- Wisconsin was admitted as a state into the Union.
 * August 14, 1848 -- Oregon Territory was formed from territory ceded by Great Britain and others.
 * March 3, 1849 -- Gold Coinage Act.
 * March 3, 1849 -- Minnesota Territory was formed from the Wisconsin Territory.

Membership highlights by chamber
This list is arranged by chamber, then by state. Senators are listed in order of seniority, and Representatives are listed by district.

Senate
Senators were elected by the state legislatures every two years, with one-third beginning new six year terms with each Congress. Preceding the names in the list below are Senate class numbers, which indicate the cycle of their election. In this Congress, Class 1 meant their term began in the last Congress, requiring reelection in 1850; Class 2 meant their term began with this Congress, requiring reelection in 1852; and Class 3 meant their term ended with this Congress, requiring reelection in 1848.

House of Representatives
The names of members of the House of Representatives elected statewide on the general ticket or otherwise at-large, are preceded by an "A/L," and the names of those elected from districts, whether plural or single member, are preceded by their district numbers.

Many of the congressional district numbers are linked to articles describing the district itself. Since the boundaries of the districts have changed often and substantially, the linked article may only describe the district as it exists today, and not as it was at the time of this Congress.

Membership detail by state
Senators were elected by the state legislatures every two years, with one-third beginning new six year terms with each Congress. Preceding the names in the list below are Senate class numbers, which indicate the cycle of their election. In this Congress, Class 1 meant their term began in the last Congress, requiring reelection in 1850; Class 2 meant their term began with this Congress, requiring reelection in 1852; and Class 3 meant their term ended with this Congress, requiring reelection in 1848.

The names of members of the House of Representatives elected statewide on the general ticket or otherwise at-large, are preceded by an "A/L," and the names of those elected from districts, whether plural or single member, are preceded by their district numbers.

Many of the congressional district numbers are linked to articles describing the district itself. Since the boundaries of the districts have changed often and substantially, the linked article may only describe the district as it exists today, and not as it was at the time of this Congress.

The list below is arranged by state, then by chamber. Senators are shown in order of seniority, House members in district order.

Alabama

 * Senate


 * 3: Arthur P. Bagby (1794-1858), Democratic …resigned June 16, 1848.
 * William R. D. King (1786-1853), Democratic …appointed to fill vacancy, July 1, 1848.
 * 2: Dixon H. Lewis (1802-1848), Democratic …died October 25, 1848.
 * Benjamin Fitzpatrick (1802-1869), Democratic …appointed to fill vacancy, November 25, 1848.
 * House of Representatives (7 seats)


 * 1: John Gayle (1792-1859), Whig
 * 2: Henry W. Hilliard (1808-1892), Whig
 * 3: Sampson W. Harris (1809-1857), Democratic
 * 4: Samuel W. Inge (1817-1868), Democratic
 * 5: George S. Houston (1811-1879), Democratic
 * 6: Williamson R. W. Cobb (1807-1864), Democratic
 * 7: Franklin W. Bowdon (1817-1857), Democratic

Arkansas

 * Senate


 * 3: Ambrose H. Sevier (1801-1848), Democratic …resigned March 15, 1848.
 * Solon Borland (1808-1864), Democratic …appointed to fill vacancy, March 30, 1848, subsequently elected.
 * 2: Chester Ashley (1790-1848), Democratic …died April 29, 1848.
 * William K. Sebastian (1812-1865), Democratic …appointed to fill vacancy, May 12, 1848, subsequently elected.
 * House of Representatives (1 seat)


 * A/L: Robert W. Johnson (1814-1879), Democratic

Connecticut

 * Senate


 * 1: Jabez W. Huntington (1788-1847), Whig …died November 1, 1847.
 * Roger S. Baldwin (1793-1863), Whig …appointed to fill vacancy, November 11, 1847, subsequently elected.
 * 3: John M. Niles (1787-1856), Democratic
 * House of Representatives (4 seats)


 * 1: James Dixon (1814-1873), Whig
 * 2: Samuel D. Hubbard (1799-1855), Whig
 * 3: John A. Rockwell (1803-1861), Whig
 * 4: Truman Smith (1791-1884), Whig

Delaware

 * Senate


 * 1: John M. Clayton (1796-1856), Whig …resigned February 23, 1849.
 * John Wales (1783-1863), Whig …elected to fill vacancy, February 23, 1849.
 * 2: Presley Spruance (1785-1863), Whig
 * House of Representatives (1 seat)


 * A/L: John W. Houston (1814-1896), Whig

Florida

 * Senate


 * 1: David Levy Yulee (1810-1886), Democratic
 * 3: James D. Westcott, Jr. (1802-1880), Democratic
 * House of Representatives (1 seat)


 * {{ushr|Florida|AL|A/L: Edward C. Cabell (1816-1896), Whig

Georgia

 * Senate


 * 3: Walter T. Colquitt (1799-1855), Democratic …resigned February 1848.
 * Herschel V. Johnson (1812-1880), Democratic …appointed to fill vacancy, February 4, 1848, subsequently elected.
 * 2: John Mcpherson Berrien (1781-1856), Whig …elected to fill vacancy in class, November 12, 1847.
 * House of Representatives (8 seats)


 * 1: Thomas B. King (1800-1864), Whig
 * 2: Alfred Iverson, Sr. (1798-1873), Democratic
 * 3: John W. Jones (1806-1871), Whig
 * 4: Hugh A. Haralson (1805-1854), Democratic
 * 5: John H. Lumpkin (1812-1860), Democratic
 * 6: Howell Cobb (1815-1868), Democratic
 * 7: Alexander H. Stephens (1812-1883), Whig
 * 8: Robert A. Toombs (1810-1885), Whig

Illinois

 * Senate


 * 3: Sidney Breese (1800-1878), Democratic
 * 2: Stephen A. Douglas (1813-1861), Democratic
 * House of Representatives (7 seats)


 * 1: Robert Smith (1802-1867), Independent Democratic
 * 2: John A. McClernand (1812-1900), Democratic
 * 3: Orlando B. Ficklin (1808-1886), Democratic
 * 4: John Wentworth (1815-1888), Democratic
 * 5: William A. Richardson (1811-1875), Democratic …elected to fill vacancy, seated December 6, 1847.
 * 6: Thomas J. Turner (1815-1874), Democratic
 * 7: Abraham Lincoln (1809-1865), Whig

Indiana

 * Senate


 * 3: Edward A. Hannegan (1807-1859), Democratic
 * 1: Jesse D. Bright (1812-1875), Democratic
 * House of Representatives (10 seats)


 * 1: Elisha Embree (1801-1863), Whig
 * 2: Thomas J. Henley (1810-1865), Democratic
 * 3: John L. Robinson (1813-1860), Democratic
 * 4: Caleb B. Smith (1808-1864), Whig
 * 5: William W. Wick (1796-1868), Democratic
 * 6: George G. Dunn (1812-1857), Whig
 * 7: Richard W. Thompson (1809-1900), Whig
 * 8: John Pettit (1807-1877), Democratic
 * 9: Charles W. Cathcart (1809-1888), Democratic
 * 10: William Rockhill (1793-1865), Democratic

Iowa

 * Senate

House of Representatives
 * 3: Augustus C. Dodge]] (1812-1883), Democratic …newly admitted state, seated December 7, 1848.
 * 2: George W. Jones (1804-1896), Democratic …newly admitted state, seated December 7, 1848.
 * 1: William Thompson (1813-1897), Democratic
 * 2: Shepherd Leffler (1811-1879), Democratic

Kentucky

 * Senate


 * 3: John J. Crittenden (1786-1863), Whig …resigned June 12, 1848.
 * Thomas Metcalfe (1780-1855), Whig …appointed to fill vacancy, June 23, 1848, subsequently elected.
 * 2: Joseph R. Underwood (1791-1876), Whig
 * House of Representatives (10 seats)


 * 1: Linn Boyd (1800-1859), Democratic
 * 2: Beverly L. Clarke (1809-1860), Democratic
 * 3: Samuel O. Peyton (1804-1870), Democratic
 * 4: Aylette Buckner (1806-1869), Whig
 * 5: John B. Thompson (1810-1874), Whig
 * 6: Green Adams (1812-1884), Whig
 * 7: W. Garnett Duncan (1800-1875), Whig
 * 8: Charles S. Morehead (1802-1868), Whig
 * 9: Richard French (1792-1854), Democratic
 * 10: John P. Gaines (1795-1857), Whig

Louisiana

 * Senate


 * 3: Henry Johnson (1783-1864), Whig
 * 2: Solomon W. Downs (1801-1854), Democratic
 * House of Representatives (4 seats)


 * 1: Emile La Sére (1802-1882), Democratic
 * 2: Bannon G. Thibodeaux (1812-1866), Whig
 * 3: John H. Harmanson (1803-1850), Democratic
 * 4: Isaac E. Morse (1809-1866), Democratic

Maine

 * Senate


 * 1: John Fairfield (1797-1847), Democratic …died December 24, 1847.
 * Wyman B. S. Moor (1811-1869), Democratic …appointed to fill vacancy, January 5, 1848.
 * Hannibal Hamlin (1809-1891), Democratic …elected to fill vacancy, May 26, 1848.
 * 2: James W. Bradbury (1802-1901), Democratic
 * House of Representatives (7 seats)


 * 1: David Hammons (1808-1888), Democratic
 * 2: Asa W. H. Clapp (1805-1891), Democratic
 * 3: Hiram Belcher (1790-1857), Whig
 * 4: Franklin Clark (1801-1874), Democratic
 * 5: Ephraim K. Smart (1813-1872), Democratic
 * 6: James S. Wiley (1808-1891), Democratic
 * 7: Hezekiah Williams (1798-1856), Democratic

Maryland

 * Senate


 * 3: James A. Pearce (1805-1862), Whig
 * 1: Reverdy Johnson (1796-1876), Whig
 * House of Representatives (6 seats)


 * 1: John G. Chapman (1798-1856), Whig
 * 2: J. Dixon Roman (1809-1867), Whig
 * 3: Thomas W. Ligon (1810-1881), Democratic
 * 4: Robert M. McLane (1815-1898), Democratic
 * 5: Alexander Evans (1818-1888), Whig
 * 6: John W. Crisfield (1806-1897), Whig

Massachusetts

 * Senate


 * 1: Daniel Webster (1782-1852), Whig
 * 2: John Davis (1787-1854), Whig
 * House of Representatives (10 seats)


 * 1: Robert C. Winthrop (1809-1894), Whig
 * 2: Daniel P. King (1801-1850), Whig
 * 3: Amos Abbott (1786-1868), Whig
 * 4: John G. Palfrey (1796-1881), Whig
 * 5: Charles Hudson (1795-1881), Whig
 * 6: George Ashmun (1804-1870), Whig
 * 7: Julius Rockwell (1805-1888), Whig
 * 8: John Quincy Adams (1767-1848), Whig …died February 23, 1848.
 * Horace Mann (1796-1859), Whig …elected to fill vacancy, seated April 13, 1848.
 * 9: Artemas Hale (1783-1882), Whig
 * 10: Joseph Grinnell (1788-1885), Whig

Michigan

 * Senate


 * 1: Lewis Cass (1782-1866), Democratic …resigned May 29, 1848, subsequently elected to fill vacancy, March 4, 1849.
 * Thomas Fitzgerald (1796-1855), Democratic …appointed to fill vacancy, June 8, 1848.
 * 2: Alpheus Felch (1804-1896), Democratic
 * House of Representatives (3 seats)


 * 1: Robert McClelland (1807-1880), Democratic
 * 2: Edward Bradley (1808-1847), Democratic …died August 5, 1847, before Congress assembled.
 * Charles E. Stuart (1810-1887), Democratic …elected to fill vacancy, seated December 6, 1847.
 * 3: Kinsley S. Bingham (1808-1861), Democratic

Mississippi

 * Senate


 * 1: Jesse Speight (1795-1847), Democratic …died May 1, 1847.
 * Jefferson Davis (1808-1889), Democratic …appointed to fill vacancy, August 10, 1847, subsequently elected.
 * 2: Henry S. Foote (1804-1880), Democratic
 * House of Representatives (4 seats)


 * 1: Jacob Thompson (1810-1885), Democratic
 * 2: Winfield S. Featherston (1820-1891), Democratic
 * 3: Patrick W. Tompkins (1804-1853), Whig
 * 4: Albert G. Brown (1813-1880), Democratic

Missouri

 * Senate


 * 1: Thomas H. Benton (1782-1858), Democratic
 * 3: David R. Atchison (1807-1886), Democratic
 * House of Representatives (5 seats)


 * 1: James B. Bowlin (1804-1874), Democratic
 * 2: John Jameson (1802-1857), Democratic
 * 3: James S. Green (1817-1870), Democratic
 * 4: Willard P. Hall (1820-1882), Democratic
 * 5: John S. Phelps (1814-1886), Democratic

New Hampshire

 * Senate


 * 3: Charles G. Atherton (1804-1853), Democratic
 * 2: John P. Hale (1806-1873), Independent Democratic
 * House of Representatives (4 seats)


 * 1: Amos Tuck (1810-1879), Independent
 * 2: Charles H. Peaslee (1804-1866), Democratic
 * 3: James Wilson (1797-1881), Whig
 * 4: James H. Johnson (1802-1887), Democratic

New Jersey

 * Senate


 * 2: Jacob W. Miller (1800-1862), Whig
 * 1: William L. Dayton (1807-1864), Whig
 * House of Representatives (5 seats)


 * 1: James G. Hampton (1814-1861), Whig
 * 2: William A. Newell (1817-1901), Whig
 * 3: Joseph E. Edsall (1789-1865), Democratic
 * 4: John Van Dyke (1807-1878), Whig
 * 5: Dudley S. Gregory (1800-1874), Whig

New York

 * Senate


 * 1: Daniel S. Dickinson (1800-1866), Democratic
 * 3: John A. Dix (1798-1879), Democratic
 * House of Representatives (34 seats)


 * 1: Frederick W. Lord (1800-1860), Democratic
 * 2: Henry C. Murphy (1810-1882), Democratic
 * 3: Henry Nicoll (1812-1879), Democratic
 * 4: William B. Maclay (1812-1882), Democratic
 * 5: Frederick A. Tallmadge (1792-1869), Whig
 * 6: David S. Jackson (1813-1872), Democratic …contested election, served until April 19, 1848.
 * Horace Greeley (1811-1872), Whig …elected to fill vacancy, seated December 4, 1848.
 * 7: William Nelson (1784-1869), Whig
 * 8: Cornelius Warren (1790-1849), Whig
 * 9: Daniel B. St. John (1808-1890), Whig
 * 10: Eliakim Sherrill (1813-1863), Whig
 * 11: Peter H. Silvester (1807-1882), Whig
 * 12: Gideon Reynolds (1813-1896), Whig
 * 13: John I. Slingerland (1804-1861), Whig
 * 14: Orlando Kellogg (1809-1865), Whig
 * 15: Sidney Lawrence (1801-1892), Democratic
 * 16: Hugh White (1798-1870), Whig
 * 17: George Petrie (1793-1879), Independent Democratic
 * 18: William Collins (1818-1878), Democratic
 * 19: Joseph Mullin (1811-1882), Whig
 * 20: Timothy Jenkins (1799-1859), Democratic
 * 21: George A. Starkweather (1794-1879), Democratic
 * 22: Ausburn Birdsall (1814-1903), Democratic
 * 23: William Duer (1805-1879), Whig
 * 24: Daniel Gott (1794-1864), Whig
 * 25: Harmon S. Conger (1816-1882), Whig
 * 26: William T. Lawrence (1788-1859), Whig
 * 27: John M. Holley (1802-1848), Whig …died March 8, 1848.
 * Esbon Blackmar (1805-1857), Whig …elected to fill vacancy, seated December 4, 1848.
 * 28: Elias B. Holmes (1807-1866), Whig
 * 29: Robert L. Rose (1804-1877), Whig
 * 30: David Rumsey, Jr. (1810-1883), Whig
 * 31: Dudley Marvin (1786-1856), Whig
 * 32: Nathan K. Hall (1810-1874), Whig
 * 33: Harvey Putnam (1793-1855), Whig
 * 34: Washington Hunt (1811-1867), Whig

North Carolina

 * Senate


 * 2: Willie P. Mangum (1792-1861), Whig
 * 3: George E. Badger (1795-1866), Whig
 * House of Representatives (9 seats)


 * 1: Thomas L. Clingman (1812-1897), Whig
 * 2: Nathaniel Boyden (1796-1873), Whig
 * 3: Daniel M. Barringer (1806-1873), Whig
 * 4: Augustine H. Shepperd (1792-1864), Whig
 * 5: Abraham W. Venable (1799-1876), Democratic
 * 6: John R. J. Daniel (1802-1868), Democratic
 * 7: James I. McKay (1793-1853), Democratic
 * 8: Richard S. Donnell (1820-1867), Whig
 * 9: David Outlaw (1806-1868), Whig

Ohio

 * Senate


 * 3: William Allen (1803-1879), Democratic
 * 1: Thomas Corwin (1794-1865), Whig
 * House of Representatives (21 seats)


 * 1: James J. Faran (1808-1892), Democratic
 * 2: David Fisher (1794-1886), Whig
 * 3: Robert C. Schenck (1809-1890), Whig
 * 4: Richard S. Canby (1808-1895), Whig
 * 5: William Sawyer (1803-1877), Democratic
 * 6: Rodolphus Dickinson (1797-1849), Democratic
 * 7: Jonathan D. Morris (1804-1875), Democratic …elected to fill vacancy, seated December 6, 1847.
 * 8: John L. Taylor (1805-1870), Whig
 * 9: Thomas O. Edwards (1810-1876), Whig
 * 10: Daniel Duncan (1806-1849), Whig
 * 11: John K. Miller (1819-1863), Democratic
 * 12: Samuel F. Vinton (1792-1862), Whig
 * 13: Thomas Ritchey (1801-1863), Democratic
 * 14: Nathan Evans (1804-1879), Whig
 * 15: William Kennon, Jr. (1802-1867), Democratic
 * 16: John D. Cummins (1791-1849), Democratic
 * 17: George Fries (1799-1866), Democratic
 * 18: Samuel Lahm (1812-1876), Democratic
 * 19: John Crowell (1801-1883), Whig
 * 20: Joshua R. Giddings (1795-1864), Whig
 * 21: Joseph M. Root (1807-1879), Whig

Pennsylvania

 * Senate


 * 1: Daniel Sturgeon (1789-1878), Democratic
 * 3: Simon Cameron (1799-1889), Democratic
 * House of Representatives (24 seats)


 * 1: Lewis C. Levin (1808-1860), American
 * 2: Joseph R. Ingersoll (1786-1868), Whig
 * 3: Charles Brown (1797-1883), Democratic
 * 4: Charles J. Ingersoll (1782-1862), Democratic
 * 5: John Freedley (1793-1851), Whig
 * 6: John W. Hornbeck (1804-1848), Whig …died January 16, 1848.
 * Samuel A. Bridges (1802-1884), Democratic …elected to fill vacancy, seated March 6, 1848.
 * 7: Abraham R. McIlvaine (1804-1863), Whig
 * 8: John Strohm (1793-1884), Whig
 * 9: William Strong (1808-1895), Democratic
 * 10: Richard Brodhead (1811-1863), Democratic
 * 11: Chester P. Butler (1798-1850), Whig
 * 12: David Wilmot (1814-1868), Democratic
 * 13: James Pollock (1810-1890), Whig
 * 14: George N. Eckert (1802-1865), Whig
 * 15: Henry Nes (1799-1850), Whig
 * 16: Jasper E. Brady (1797-1871), Whig
 * 17: John Blanchard (1787-1849), Whig
 * 18: Andrew Stewart (1791-1872), Whig
 * 19: Job Mann (1795-1873), Democratic
 * 20: John Dickey (1794-1853), Whig
 * 21: Moses Hampton (1803-1878), Whig
 * 22: John W. Farrelly (1809-1860), Whig
 * 23: James Thompson (1806-1874), Democratic
 * 24: Alexander Irvin (1800-1874), Whig

Rhode Island

 * Senate


 * 1: Albert C. Greene (1792-1863), Whig
 * 2: John H. Clarke (1789-1870), Whig
 * House of Representatives (2 seats)


 * 1: Robert B. Cranston (1791-1873), Whig
 * 2: Benjamin B. Thurston (1804-1886), Democratic

South Carolina

 * Senate


 * 2: John C. Calhoun (1782-1850), Democratic
 * 3: Andrew P. Butler (1796-1857), Democratic
 * House of Representatives (7 seats)


 * 1: James A. Black (1793-1848), Democratic …died April 3, 1848.
 * Daniel Wallace (1801-1859), Democratic …elected to fill vacancy, seated June 12, 1848.
 * 2: Richard F. Simpson (1798-1882), Democratic
 * 3: Joseph A. Woodward (1806-1885), Democratic
 * 4: Alexander D. Sims (1803-1848), Democratic …died November 16, 1848.
 * John McQueen (1804-1867), Democratic …elected to fill vacancy, seated February 12, 1849.
 * 5: Armistead Burt (1802-1883), Democratic
 * 6: Isaac E. Holmes (1796-1867), Democratic
 * 7: R. Barnwell Rhett (1800-1876), Democratic

Tennessee

 * Senate


 * 1: Hopkins L. Turney (1797-1857), Democratic
 * 2: John Bell (1797-1869), Whig …elected to fill vacancy, November 22, 1847.
 * House of Representatives (11 seats)


 * 1: Andrew Johnson (1808-1875), Democratic
 * 2: William M. Cocke (1815-1896), Whig
 * 3: John H. Crozier (1812-1889), Whig
 * 4: Hugh L. W. Hill (1810-1892), Democratic
 * 5: George W. Jones (1806-1884), Democratic
 * 6: James H. Thomas (1808-1876), Democratic
 * 7: Meredith P. Gentry (1809-1866), Whig
 * 8: Washington Barrow (1807-1866), Whig
 * 9: Lucien B. Chase (1817-1864), Democratic
 * 10: Frederick P. Stanton (1814-1894), Democratic
 * 11: William T. Haskell (1818-1859), Whig

Texas

 * Senate


 * 2: Samuel Houston (1793-1863), Democratic
 * 1: Thomas J. Rusk (1803-1857), Democratic
 * House of Representatives (2 seats)


 * 1: David S. Kaufman (1813-1851), Democratic
 * 2: Timothy Pilsbury (1789-1858), Democratic

Vermont

 * Senate


 * 1: Samuel S. Phelps (1793-1855), Whig
 * 3: William Upham (1792-1853), Whig
 * House of Representatives (4 seats)


 * 1: William Henry (1788-1861), Whig
 * 2: Jacob Collamer (1791-1865), Whig
 * 3: George P. Marsh (1801-1882), Whig
 * 4: Lucius B. Peck (1802-1866), Democratic

Virginia

 * Senate


 * 1: James M. Mason (1798-1871), Democratic
 * 2: Robert M. T. Hunter (1809-1887), Democratic
 * House of Representatives (15 seats)


 * 1: Archibald Atkinson (1792-1872), Democratic
 * 2: George C. Dromgoole (1797-1847), Democratic …died April 27, 1847, before Congress assembled.
 * Richard K. Meade (1803-1862), Democratic …elected to fill vacancy, seated December 6, 1847.
 * 3: Thomas S. Flournoy (1811-1883), Whig
 * 4: Thomas S. Bocock (1815-1891), Democratic
 * 5: William L. Goggin (1807-1870), Whig
 * 6: John M. Botts (1802-1869), Whig
 * 7: Thomas H. Bayly (1810-1856), Democratic
 * 8: Richard Lee T. Beale (1819-1893), Democratic
 * 9: John S. Pendleton (1802-1868), Whig
 * 10: Henry Bedinger (1812-1858), Democratic
 * 11: James McDowell (1795-1851), Democratic
 * 12: William B. Preston (1805-1862), Whig
 * 13: Andrew S. Fulton (1800-1884), Whig
 * 14: Robert A. Thompson (1805-1876), Democratic
 * 15: William G. Brown, Sr. (1800-1884), Democratic

Wisconsin

 * Senate


 * 1: Henry Dodge (1782-1867), Democratic …newly admitted state, seated June 8, 1848.
 * 3: Isaac P. Walker (1815-1872), Democratic …newly admitted state, seated June 8, 1848.
 * House of Representatives (2 seats)


 * A/L: Mason C. Darling (1801-1866), Democratic
 * A/L: William P. Lynde (1817-1885), Democratic

Membership detail by Chamber/Party
The list below is arranged by chamber, then by political party. Members are shown in alphabetical order.

Senate
Senators were elected by the state legislatures every two years, with one-third beginning new six year terms with each Congress.

House of Representatives
Members of the House of Representatives were elected by popular vote, variously to single member districts or at-large.

Membership Changes
The count below reflects changes from the beginning of the first session of this Congress.