In addition, the Senate was called into special session by outgoing President James Polk for incoming President Zachary Taylor and met from March 5 , 1849 to March 23 , 1849 .
See Also: List of United States federal legislation#Thirty-first United States Congress
- Nathaniel Albertson (''Representative''), Democrat , IN
- Henry Porteous Alexander (''Representative''), Whig , NY
- Charles Allen (''Representative''), Free Soil , MA
- William Jeffreys Alston (''Representative''), Whig , AL
- Josiah McNair Anderson (''Representative''), Whig , TN
- George Rex Andrews (''Representative''), Whig , NY
- William Shepperd Ashe (''Representative''), Democrat , NC
- George Ashmun (''Representative''), Whig , MA
- David Rice Atchison (''Senator''), Democrat , MO
- Thomas Hamlet Averett (''Representative''), Democrat , VA
- George Edmund Badger (''Senator''), Whig , NC
- Edward Dickinson Baker (''Representative''), Whig , IL
- Roger Sherman Baldwin (''Senator''), Whig , CT
- Robert Woodward Barnwell (''Senator''), Democrat , SC
- William Van Ness Bay (''Representative''), Democrat , MO
- Thomas Henry Bayly (''Representative''), Democrat , VA
- James Madison Hite Beale (''Representative''), Democrat , VA
- John Bell(Ohio Politician) (''Representative''), Whig , OH
- John Bell (''Senator''), Whig , TN
- Henry Bennett (''Representative''), Whig , NY
- Thomas Hart Benton (''Senator''), Democrat , MO
- John Macpherson Berrien (''Senator''), Whig , GA
- Kinsley Scott Bingham (''Representative''), Democrat , MI
- William Harrison Bissell (''Representative''), Democrat , IL
- Thomas Stanley Bocock (''Representative''), Democrat , VA
- David Alexander Bokee (''Representative''), Whig , New York
- Walter Booth (''Representative''), Free Soil , CT
- Solon Borland (''Senator''), Democrat , AR
- Franklin Welsh Bowdon (''Representative''), Democrat , AL
- Richard Johns Bowie (''Representative''), Whig , MD
- James Butler Bowlin (''Representative''), Democrat , MO
- Linn Boyd (''Representative''), Democrat , KY
- James Ware Bradbury (''Senator''), Democrat , ME
- Daniel Breck (''Representative''), Whig , KY
- George Briggs (''Representative''), Whig , NY
- Jesse David Bright (''Senator''), Democrat , IN
- John Brisbin (''Representative''), Democrat , Pennsylvania
- James Books (''Representative''), Whig , NY
- Albert Gallatin Brown (''Representative''), Democrat , MS
- William John Brown (''Representative''), Democrat , IN
- Alexander Woodruff Buel (''Representative''), Democrat , MI
- Henry Adams Bullard (''Representative''), Whig , LA
- Lorenzo Burrows (''Representative''), Whig , NY
- Armistead Burt (''Representative''), Democrat , SC
- Andrew Pickens Butler (''Senator''), Democrat , SC
- Chester Pierce Butler (''Representative''), Whig , PA
- Thomas Belden Butler (''Representative''), Whig , CT
- Edward Carrington Cabell (''Representative''), Whig , FL
- Joseph Cable (''Representative''), Democrat , OH
- George Alfred Caldwell (''Representative''), Democrat , KY
- Joseph Pearson Caldwell (''Representative''), Whig , NC
- John Caldwell Calhoun (''Senator''), Democrat , SC
- Samuel Calvin (''Representative''), Whig , PA
- Lewis David Campbell (''Representative''), Whig , OH
- David Kellogg Cartter (''Representative''), Democrat , OH
- Joseph Casey (''Representative''), Whig , PA
- Lewis Cass (''Senator''), Democrat , MI
- Joseph Ripley Chandler (''Representative''), Whig , PA
- Salmon Portland Chase (''Senator''), Free Soil , OH
- Charles Ezra Clarke (''Representative''), Whig , NY
- John Hopkins Clarke (''Senator''), Whig , RI
- Henry Clay (''Senator''), Whig , KY
- Jeremiah Clemens (''Senator''), Democrat , AL
- Chauncey Fitch Cleveland (''Representative''), Democrat , CT
- Thomas Lanier Clingman (''Representative''), Whig , NC
- Howell Cobb (''Representative''), Democrat , GA
- Williamson Robert Winfield Cobb (''Representative''), Democrat , AL
- William Ferguson Colcock (''Representative''), Democrat , SC
- Orsamus Cole (''Representative''), Whig , WI
- Harmon Sweatland Conger (''Representative''), Whig , NY
- Charles Magill Conrad (''Representative''), Whig , LA
- James Cooper (''Senator''), Whig , PA
- Moses Bledso Corwin (''Representative''), Whig , OH
- Thomas Corwin (''Senator''), Whig , OH
- John Crowell (''Representative''), Whig , OH
- John Reeves Jones Daniel (''Representative''), Democrat , NC
- Joel Buchanan Danner (''Representative''), Democrat , PA
- Jefferson Davis (''Senator''), Democrat , MS
- John Davis (''Senator''), Whig , MA
- William Crosby Dawson (''Senator''), Whig , GA
- William Lewis Dayton (''Senator''), Whig , NJ
- Edmund Deberry (''Representative''), Whig , NC
- Jesse Column Dickey (''Representative''), Whig , PA
- Daniel Stevens Dickinson (''Senator''), Democrat , NY
- Rodolphus Dickinson (''Representative''), Democrat , OH
- Milo Melankthon Dimmick (''Representative''), Democrat , PA
- David Tiernan Disney (''Representative''), Democrat , OH
- Nathan Fellows Dixon (''Representative''), Whig , RI
- Augustus Caesar Dodge (''Senator''), Democrat , IA
- Henry Dodge (''Senator''), Democrat , WI
- James Duane Doty (''Representative''), Democrat , WI
- Stephen Arnold Douglas (''Senator''), Democrat , IL
- Solomon Weathersbee Downs (''Senator''), Democrat , LA
- William Duer (''Representative''), Whig , NY
- James Henry Duncan (''Representative''), Whig , MA
- Cyrus Livingston Dunham (''Representative''), Democrat , IN
- Charles Durkee (''Representative''), Republican , WI
- Henry Alonzo Edmundson (''Representative''), Democrat , VA
- Samuel Atkins Eliot (''Representative''), Whig , MA
- Franklin Harper Elmore (''Senator''), Democrat , SC
- Alexander Evans (''Representative''), Whig , MD
- Nathan Evans (''Representative''), Whig , OH
- Andrew Ewing (''Representative''), Democratic , TN
- Thomas Ewing (''Senator''), Anti-Jackson , OH
- Winfield Scott Featherston (''Representative''), Democrat , MS
- Alpheus Felch (''Senator''), Democrat , MI
- Graham Newell Fitch (''Representative''), Democrat , IN
- Henry Stuart Foote (''Senator''), Democrat , MS
- Orin Fowler (''Representative''), Whig , MA
- John Freedley (''Representative''), Whig , PA
- John Charles Fremont (''Senator''), Democrat , CA
- Thomas James Duncan Fuller (''Representative''), Democrat , ME
- Meredith Poindexter Gentry (''Representative''), Whig , TN
- Elbridge Gerry (''Representative''), Democrat , ME
- Joshua Reed Giddings (''Representative''), Whig , OH
- Edward Gilbert (''Representative''), Democrat , CA
- Alfred Gilmore (''Representative''), Democrat , PA
- Rufus King Goodenow (''Representative''), Whig , ME
- Willis Arnold Gorman (''Representative''), Democrat , IN
- Daniel Gott (''Representative''), Whig , NY
- Herman Day Gould (''Representative''), Whig , NY
- James Stephen Green (''Representative''), Democrat , MO
- Albert Collins Greene (''Senator''), Whig , RI
- Joseph Grinnell (''Representative''), Whig , MA
- William McKendree Gwin (''Senator''), Democrat , CA
- Thomas C. Hackett (''Representative''), Democrat , GA
- John Parker Hale (''Senator''), Free Soil , NH
- Willard Preble Hall (''Representative''), Democrat , MO
- Ransom Halloway (''Representative''), Whig , NY
- William Thomas Hamilton (''Representative''), Democrat , TN
- Hannibal Hamlin (''Senator''), Democrat , ME
- Edward Hammond (''Representative''), Democrat , MD
- Moses Hampton (''Representative''), Whig , PA
- Hugh A. Haralson (''Representative''), Democrat , GA
- Andrew Jackson Harlan (''Representative''), Democrat , IN
- John Henry Harmanson (''Representative''), Democrat , LA
- Isham Green Harris (''Representative''), Democrat , TN
- Sampson Willis Harris (''Representative''), Democrat , AL
- Thomas Langrell Harris (''Representative''), Democrat , IL
- Andrew Kessler Hay (''Representative''), Whig , NJ
- Thomas Sherwood Haymond (''Representative''), Whig , VA
- William Hebard (''Representative''), Whig , VT
- William Henry (''Representative''), Whig , VT
- Harry Hibbard (''Representative''), Democrat , NH
- Henry Washington Hilliard (''Representative''), Whig , AL
- Moses Hoagland (''Representative''), Democrat , OH
- Alexander Richmond Holladay (''Representative''), Democrat , VA
- Isaac Edward Holmes (''Representative''), Democrat , SC
- John Wallace Houston (''Representative''), Whig , DE
- Samuel Houston (''Senator''), Democrat , TX
- Volney Erskine Howard (''Representative''), Democrat , TX
- John W. Howe (''Representative''), Whig , PA
- David Hubbard (''Representative''), Democrat , AL
- Robert Mercer Taliaferro Hunter (''Senator''), Democrat , VA
- William Forrest Hunter (''Representative''), Whig , OH
- Joseph Webber Jackson (''Representative''), Democrat , GA
- William Terry Jackson (''Representative''), Whig , NY
- Andrew Johnson (''Representative''), Democrat , TN
- James Leeper Johnson (''Representative''), Whig , KY
- Reverdy Johnson (''Senator''), Whig , MD
- Robert Ward Johnson (''Representative''), Democrat , AR
- George Wallace Jones (''Senator''), Democrat , IA
- George Washington Jones (''Representative''), Democrat , TN
- George Washington Julian (''Representative''), Republican , IN
- David Spangler Kaufman (''Representative''), Democrat , TX
- John Bozman Kerr (''Representative''), Whig , MD
- Daniel Putnam King (''Representative''), Whig , MA
- George Gordon King (''Representative''), Whig , RI
- James Gore King (''Representative''), Whig , NJ
- John Alsop King (''Representative''), Whig , NY
- Preston King (''Representative''), Democrat , NY
- Thomas Butler King (''Representative''), Whig , GA
- William Rufus De Vane King (''Senator''), Democrat , AL
- Willie Person Mangum (''Senator''), Whig , NC
- Horace Mann (''Representative''), Whig , MA
- Job Mann (''Representative''), Democrat , PA
- George Perkins Marsh (''Representative''), Whig , VT
- Humphrey Marshall (''Representative''), Whig , KY
- James Murray Mason (''Senator''), Democrat , VA
- John Calvin Mason (''Representative''), Democrat , KY
- Orsamus Benajah Matteson (''Representative''), Whig , NY
- John Alexander McClernand (''Representative''), Democrat , IL
- Joseph Ewing McDonald (''Representative''), Democrat , IN
- James McDowell (''Representative''), Democrat , VA
- Edward Wilson McGaughey (''Representative''), Whig , IN
- Thomas McKissock (''Representative''), Whig , NY
- James Xavier McLanahan (''Representative''), Democrat , PA
- Robert Milligan McLane (''Representative''), Democrat , MD
- Finis Ewing McLean (''Representative''), Whig , KY
- Fayette McMullen (''Representative''), Democrat , VA
- John McQueen (''Representative''), Democrat , SC
- William McWillie (''Representative''), Democrat , MS
- James Meachem (''Representative''), Whig , VT
- Richard Kidder Meade (''Representative''), Democrat , VA
- Daniel Fry Miller (''Representative''), Whig , IA
- Jacob Welsh Miller (''Senator''), Whig , NJ
- John Krepps Miller (''Representative''), Democrat , OH
- John Singleton Millson (''Representative''), Democrat , VA
- Henry Dunning Moore (''Representative''), Whig , PA
- Charles Slaughter Morehead (''Representative''), Whig , KY
- Jonathan David Morris (''Representative''), Democrat , OH
- George Washington Morrison (''Representative''), Democrat , NH
- Isaac Edward Morse (''Representative''), Democrat , LA
- Jackson Morton (''Senator''), Whig , FL
- Jeremiah Morton (''Representative''), Whig , VA
- William Nelson (''Representative''), Whig , NY
- Henry Nes (''Representative''), Whig , PA
- William Augustus Newell (''Representative''), Whig , NJ
- Alexander Newman (''Representative''), Democrat , VA
- Moses Norris Jr. (''Senator''), Democrat , NH
- Andrew Jackson Ogle (''Representative''), Whig , PA
- Edson Baldwin Olds (''Representative''), Democrat , OH
- James Lawrence Orr (''Representative''), Democrat , SC
- John Otis (''Representative''), Whig , NC
- David Outlaw (''Representative''), Whig , NC
- Allen Ferdinand Owen (''Representative''), Whig , GA
- Richard Parker (''Representative''), Democrat , VA
- James Alfred Pearce (''Senator''), Whig , MD
- Charles Hazen Peaslee (''Representative''), Democrat , NH
- Lucius Benedict Peck (''Representative''), Democrat , VT
- Alexander Gordon Penn (''Representative''), Democrat , LA
- John Smith Phelps (''Representative''), Democrat , MO
- Samuel Shethar Phelps (''Senator''), Whig , VT
- Jonas Philips Phoenix (''Representative''), Whig , NY
- Charles Wesley Pitman (''Representative''), Whig , PA
- Emery Davis Potter (''Representative''), Democrat , OH
- Paulus Powell (''Representative''), Democrat , VA
- Thomas George Pratt (''Senator''), Whig , MD
- Harvey Putnam (''Representative''), Whig , NY
- Robert Rantoul Jr. (''Senator''), Democrat , MA
- Robert Rentoul Reed (''Representative''), Whig , PA
- Gideon Reynolds (''Representative''), Whig , NY
- Robert Barnwell Rhett (''Senator''), Democrat , SC
- William Alexander Richardson (''Representative''), Democrat , IL
- Elijah Risley (''Representative''), Whig , NY
- John Robbins (''Representative''), Democrat , PA
- John Larne Robinson (''Representative''), Democrat , IN
- William Rockhill (''Representative''), Democrat , IN
- Julius Rockwell (''Representative''), Whig , MA
- Joseph Mosley Root (''Representative''), Free Soil , OH
- Robert Lawson Rose (''Representative''), Whig , NY
- Thomas Ross (''Representative''), Democrat , PA
- David Rumsey (''Representative''), Whig , NY
- Thomas Jefferson Rusk (''Senator''), Democrat , TX
- William Augustus Sackett (''Representative''), Whig , NY
- John Houston Savage (''Representative''), Democrat , TN
- Cullen Sawtelle (''Representative''), Democrat , ME
- Robert Cumming Schenck (''Representative''), Whig , OH
- Abraham Maus Schermerhorn (''Representative''), Whig , NY
- John Lawrence Schoolcraft (''Representative''), Whig , NY
- William King Sebastian (''Senator''), Democrat , AR
- James Alexander Seddon (''Representative''), Democrat , VA
- William Henry Seward (''Senator''), Whig , NY
- Augustine Henry Shepperd (''Representative''), Whig , NC
- James Shields (''Senator''), Democrat , IL
- Henry Hastings Sibley (''Delegate''), Minnesota Territory
- Peter Henry Silvester (''Representative''), Whig , NY
- Truman Smith (''Senator''), Whig , CT
- SOULÉ, Pierre (''Senator''), Democrat , LA
- Elbridge Gerry Spaulding (''Representative''), Whig , NY
- William Sprague (''Representative''), Whig , MI
- Presley Spruance (''Senator''), Whig , DE
- Edward Stanly (''Representative''), Whig , NC
- Frederick Perry Stanton (''Representative''), Democrat , TN
- Richard Henry Stanton (''Representative''), Democrat , KY
- Alexander Hamilton Stephens (''Representative''), Whig , GA
- Charles Stetson (''Representative''), Democrat , ME
- Thaddeus Stevens (''Representative''), Whig , PA
- David Stewart (''Senator''), Whig , MD
- William Strong (''Representative''), Democrat , PA
- Daniel Sturgeon (''Senator''), Democrat , PA
- Charles Sweetser (''Representative''), Democrat , OH
- John Lampkin Taylor (''Representative''), Whig , OH
- James Houston Thomas (''Representative''), Democrat , TN
- Jacob Thompson (''Representative''), Democrat , MS
- James Thompson (''Representative''), Democrat , PA
- John Burton Thompson (''Representative''), Whig , KY
- William Thompson (''Representative''), Democrat , IA
- John Richardson Thurman (''Representative''), Whig , NY
- Samuel Royal Thurston (''Delegate''), Democrat , Oregon Territory
- Robert Augustus Toombs (''Representative''), Whig , GA
- Amos Tuck (''Representative''), Whig , NH
- Hopkins Lacy Turney (''Senator''), Democrat , TN
- Hiram Walden (''Representative''), Democrat , NY
- Loren Pinckney Waldo (''Representative''), Democrat , CT
- John Wales (''Senator''), Whig , DE
- Isaac Pigeon Walker (''Senator''), Democrat , WI
- Daniel Wallace (''Representative''), Democrat , SC
- Albert Galiton Watkins (''Representative''), Whig , TN
- Daniel Webster (''Senator''), Whig , MA
- Marshall Johnson Wellborn (''Representative''), Democrat , GA
- John Wentworth (''Representative''), Democrat , IL
- James Whitcomb (''Senator''), Democrat , IN
- Hugh White (''Representative''), Whig , NY
- William Augustus Whittlesey (''Representative''), Democrat , OH
- Isaac Wildrick (''Representative''), Democrat , NJ
- Christopher Harris Williams (''Representative''), Whig , TN
- David Wilmot (''Representative''), Democrat , PA
- James Wilson (''Representative''), Whig , NH
- Robert Charles Winthrop (''Senator''), Whig , MA
- Joseph Addison Woodward (''Representative''), Democrat , SC
- George Washington Wright (''Representative''), Independent , CA
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