This is a list of electors (members of the Electoral College) who cast ballots to elect the President of the United States and Vice President of the United States in the 1820 presidential election. The election was won by incumbent president James Monroe, with 231 (or 228) electoral votes, and incumbent vice president Daniel D. Tompkins, with 218 (or 215) votes.

A total of 235 men were elected to the Electoral College, but three—one each from Mississippi, Pennsylvania, and Tennessee—did not cast their ballots. At least two, Melchior Rahm and Duncan Stewart, had died before their state's electors voted; the disposition of the third is unclear.

In addition, the status of the three electors from Missouri was a matter of dispute. Congress had passed an enabling act directing Missouri to organize a state government and that "the said state, when formed, shall be admitted into the Union." The dispute was over whether Missouri's new state constitution fulfilled the requirements. In the end, two official vote totals were announced by Congress, one counting Missouri's votes and one not, with neither declared the canonical result — the source of debates over whether Monroe won 231 or 228 electoral votes. Missouri was not officially admitted as a state until August 10, 1821.

Alabama

All 3 of Alabama's electors voted for James Monroe for president and Daniel D. Tompkins for vice president. Henry Minor George Phillips John Scott

Connecticut

All 9 of Connecticut's electors voted for Monroe and Tompkins. John Alsop Ebenezer Brockway William Cogswell Ingoldsby W. Crawford Isaiah Loomis William Moseley Samuel H. Phillips Henry Seymour Samuel Welles

Delaware

All four of Delaware's electors voted Monroe for president. For vice president, however, all four voted for Delaware Federalist Daniel Rodney, the only votes he received. Andrew Barratt John Clark Nicholas Ridgely Peter Robinson

Georgia

All 8 of Georgia's electors voted for Monroe and Tompkins. John Foster John Graves John MacIntosh David Meriwether Henry Mitchell Oliver Porter John Rutherford Benjamin Whitaker

Illinois

All 3 of Illinois's electors voted for Monroe and Tompkins. Adolphus Hubbard Michael Jones James B. Moore

Indiana

All 3 of Indiana's electors voted for Monroe and Tompkins. Daniel J. Caswell Nathaniel Ewing John H. Thompson

Kentucky

All 12 of Kentucky's electors voted for Monroe and Tompkins. Jesse Bledsoe Thomas Bodley Samuel Caldwell Ephraim M. Ewing Martin D. Hardin James Johnson John E. King Willis A. Lee Samuel Murrel John Pope Hubbard Taylor Richard Taylor

Louisiana

All 3 of Louisiana's electors voted for Monroe and Tompkins. John Randolph Grymes Philemon Thomas David L. Todd

Maine

All 9 of Maine's electors voted for Monroe and Tompkins. Elisha Allen William Chadwick Joshua Gage Levi Hubbard William Moody Josiah Prescott Lemuel Trescott Samuel Tucker Joshua Wingate, Jr.

Maryland

All 11 of Maryland's electors voted Monroe for president. Ten voted Tompkins for vice president, but James Forrest cast his ballot for Maryland Federalist Robert Goodloe Harper. John Boon Robert W. Bowie Elias Brown James Forrest John Forward William Gabby Alexander McKim Joshua Prideaux Michael Sprigg John Stephen William R. Stuart

Massachusetts

All 15 of Massachusetts's electors voted Monroe for president. Seven of the 15 voted for Tompkins for vice president, but eight voted instead for New Jersey Federalist Richard Stockton, the only votes he received. No known record indicates which electors voted for each candidate. John Adams Thomas H. Blood Benjamin Williams Crowninshield Samuel Dana John Davis Wendell Davis William Gray John Heard Ebenezer Mattoon William Phillips Jonas Sibley Seth Sprague Ezra Starkweather Daniel Webster Joseph Woodbridge

Mississippi

Two of Mississippi's 3 electors voted for Monroe and Tompkins. Elector Duncan Stewart died on November 26, 1820, before casting his ballot. Daniel Burnet Theodore Stark Duncan Stewart (died before voting)

Missouri

All 3 of Missouri's electors voted for Monroe and Tompkins, though whether they should be counted—Missouri would not be formally admitted as a state for several more months—was an unsettled matter of dispute. John S. Brickey William Christy William Shannon

New Hampshire

Seven of New Hampshire's 8 electors voted for Monroe and Tompkins. Faithless elector William Plumer cast his ballot for Secretary of State John Quincy Adams for president and Pennsylvania Federalist Richard Rush for vice president. David Barker, Jr. Ezra Bartlett Samuel Dinsmoor William Fisk John Pendexter William Plumer Nathaniel Shannon James Smith

New Jersey

All 8 of New Jersey's electors voted for Monroe and Tompkins. Joseph Budd John Crowell David Mills Isaiah Shinn John L. Smith Samuel L. Southard Aaron Vansyckel John Wilson

New York

All 29 of New York's electors voted for Monroe and Tompkins. John Baker James Brisban Latham A. Burrows Jonathan Collins Gilbert Eddy William Floyd Howell Gardner David Hammond Elisha Harnham Abel Huntington Benjamin Knower Issac Lawrence Edward P. Livingston Daniel MacDougall Peter Millikin Samuel Nelson Jacob Odell William B. Rochester Henry Rutgers Edward Severich Mark Spencer Farrand Stranahan Philetus Swift John Targee Charles Thompson Henry Wager John Walworth Peter Waring Seth Wetmore

North Carolina

All 15 of North Carolina's electors voted for Monroe and Tompkins. Benjamin H. Covington Jesse Franklin Alexander Gray John Hall Charles E. Johnson Kimborough Jones Thomas S. Kenan Francis Locke Robert Love Michael MacLeary James Mebane George Outlaw Abraham Phillips Henry J. G. Ruffin Lewis D. Wilson

Ohio

All 8 of Ohio's electors voted for Monroe and Tompkins. James Caldwell Alexander Campbell Lewis Dille William Henry Harrison James Kilbourne Robert Lucas John MacLaughlin Jeremiah Morrow

Pennsylvania

All 25 Pennsylvania electors were pledged to Monroe and Tompkins, but only 24 ended up casting ballots. Former state senator Melchior Rahm was chosen as an elector, but he died on the day Pennsylvania electors were scheduled to vote, October 31, 1820. George Barnitz Philip Benner William Clinghan Paul Cox Pierce Crosby Hugh Davis Daniel W. Dingam Patrick Farrelly Andrew Gilkerson James Griffen Daniel Groves John Hamilton George Hebb Gabriel Hiester Joseph Huston James Kerr Thomas Leiper John Miley William Mitchell George Plumer Chandler Price James P. Sanderson Andrew Sutton John Todd Melchior Rahm (died before voting)

Rhode Island

All 4 of Rhode Island's electors voted for Monroe and Tompkins. Dutee Arnold James Fenner Robert F. Noyes Dutee J. Pearce

South Carolina

All 11 of South Carolina's electors voted for Monroe and Tompkins. Lewis M. Ayer William A. Ball Rasha Cannon Benjamin Dickson John Dunovant John S. Glascock Benjamin James Matthew J. Kirth Charles Miller Benjamin Rynalds Isaac Smith

Tennessee

Seven of Tennessee's 8 electors voted for Monroe and Tompkins. For reasons that remain unclear, no elector voted for the state's fourth elector district. David Campbell Alfred M. Carter Joseph Dickson Joseph Hamilton, Sr. German Lester Henry Small John J. White

Vermont

All 8 of Vermont's electors voted for Monroe and Tompkins. D. Azro A. Buck Ezra Butler Gilbert Denison James Galusha Aaron Leland William Slade, Jr. Pliny Smith Timothy Stanley

Virginia

All 25 of Virginia's electors voted for Monroe and Tompkins. Branch T. Archer William Armstrong Samuel Blackburn William Brockenbrough John T. Brook Thomas Brown John Edie Charles H. Graves Hugh Holmes William C. Holt Armistead Hoomes James Hunter William Jones Joseph Martin John Pegram John Purnall William Cabell Rives Andrew Russell Archibald Rutherford Robert Shields Robert B. Stark Archibald Stuart John Taliaferro Robert Taylor Charles Yancey

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