List of political parties in the United States

This is a list of political parties in the United States, both past and present. The list does not include independents.

Represented in state legislatures
The following third parties have members in state legislatures affiliated with them.

Represented in the legislature of the unincorporated territory of Puerto Rico
The following third parties are represented in the Puerto Rican Legislature.

Parties with ballot access for Congress, state legislatures, or territorial legislatures
The following third parties have ballot access in at least one state and are not represented in a national office, state legislature, or territorial legislature.

Active parties without ballot access
''The following parties have been active in the past 4 years, but as of December 2021, did not have official ballot access in any state. ''

Active
These organizations generally do not nominate candidates for election, but some of them have in the past; they otherwise function similarly to political parties.

Historical
These historical organizations did not officially nominate candidates for election but may have endorsed or supported campaigns; they otherwise functioned similarly to political parties.

Party registration
Officially recognized parties in states are not guaranteed have ballot access, membership numbers of some parties with ballot access are not tracked, and vice versa. Not all of these parties are active, and not all states record voter registration by party. Boxes in gray mean that the specific party's registration is not reported.

Parties by number of registered voters

 * Democratic Party – 46,121,872
 * Republican Party – 36,556,705
 * American Independent Party – 834,730
 * Libertarian Party – 704,455
 * Independent Party of Florida – 234,524
 * Green Party – 210,053
 * Conservative Party of New York State – 164,826
 * Peace and Freedom Party – 138,238
 * Independent Party of Oregon – 137,972
 * Independent Party of Louisiana – 136,125
 * No Labels – 109,920
 * American Independent Party of Nevada – 103,500
 * American Independent Party of Utah – 85,243
 * Working Families Party – 64,674
 * Constitution Party – 46,553
 * Liberal Party – 31,343
 * Independent Party of Connecticut – 29,136
 * Common Sense Party – 22,029
 * Conservative Party of Florida – 17,595
 * Alaskan Independence Party – 18,683
 * Conservative Party of New Jersey – 14,639
 * United Independent Party – 14,469
 * Independent Party of Delaware – 10,722
 * Constitution Party of Utah – 8,475
 * Socialist Party of New Jersey – 7,856
 * Legal Marijuana NOW Party of Nebraska – 6,684
 * Natural Law Party – 5,668
 * Boricua Party – 5,068
 * Approval Voting Party – 4,721
 * Constitution Party of Oregon – 3,845
 * We the People Party – 3,445
 * Oregon Progressive Party – 3,213
 * Unity Party – 3,134
 * United Utah – 3,087
 * Coalition With a Purpose – 2,936
 * Ecology Party of Florida – 2,881
 * Reform Party – 2,742
 * Party for Socialism and Liberation – 1,827
 * Socialist Party – 1,700
 * Socialist Party of Massachusetts – 1,615
 * Colorado Center Party – 1,558
 * Green Party of Alaska – 1,520
 * People's Party – 1,212
 * Conservative Party of Louisiana – 794
 * Conservative Party of Delaware – 790
 * Socialist Workers Party – 727
 * Liberal Party of Delaware – 682
 * Forward Party – 608
 * American Party of Delaware – 520
 * American Solidarity Party – 568
 * American Delta Party – 462
 * Alaska Moderate Party – 388
 * Progressive Party of Alaska – 253
 * Patriot's Party of Alaska – 219
 * Workers Party of Massachusetts – 183
 * OWL – 96
 * Mandalorians – 92
 * Blue Enigma Party – 81
 * Alliance Party – 62
 * Normal Party of California – 24
 * Prohibition Party – 19
 * Moderate Party of California – 18
 * One Party – 15
 * FreedomReform Party – 8=
 * Ring of Truth Party – 6
 * Hogwash Party – 5
 * Aurora Party – 3
 * Unaffiliated/Independent – 34,006,350