| United to Change Our Gun Laws | I | DC |
| United Together | O | NC |
| United to Win | N | VA |
| United Utah Party Candidate Committee | X | UT |
| United Veterans Alliance of America PAC INC | O | IL |
| United We Can | O | DC |
| United We Dream Action | I | DC |
| United We Dream Action PAC | O | DC |
| United We Stand | O | VA |
| United We Stand 2024 | P | IL |
| United We Win Super PAC | O | NJ |
| United Wholesale Mortgage PAC (Uwm Pac) | Q | MI |
| United With Delia for Congress | H | IL |
| United Women'S Health Alliance PAC | O | DC |
| Unite Florida | O | FL |
| Unite for Colorado Action | O | CO |
| Unite Here Arizona | I | AZ |
| Unite Here Local 11 PAC | O | CA |
| Unite Here Local 8 | I | WA |
| Unite Here PAC | O | NY |
| Unite Here Tip Campaign Committee | Q | NY |
| Unite Here Tip State & Local Fund | I | NY |
| Unite Nevada | N | NV |
| Unite PAC | V | DC |
| Unite the Country | O | DC |
| Unite the Fight PAC | N | NY |
| Unite the Ninth, INC | O | VA |
| Unite to Win | O | DC |
| Unite U.S. Again INC. | O | NJ |
| Unite Wa PAC | O | VA |
| Uniti Group INC Political Action Committee | N | AR |
| Uniti Group INC. Political Action Committee | N | AR |
| Uniting America PAC INC. | O | VA |
| Uniting for Economic Opportunity | N | VA |
| Uniting for Free Expression | N | VA |
| Uniting for Free Trade | N | VA |
| Uniting for Immigration Reform | N | VA |
| Uniting for Opportunity | N | VA |
| Uniting Missouri PAC | V | MO |
| Uniting Ohio Action Fund | O | OH |
| Unity | X | MO |
| Unity9 Political Action Committee | N | DC |
| Unity First PAC | O | MD |
| Unity for A Better Future | O | CA |
| Unity in Action | U | FL |
| Unity & Justice Fund | O | CA |
| Unity Lab PAC | V | TX |
| Unity Movement Super PAC, LLC | N | AK |
| Unity Political Action Committee | N | GA |
| Unity Voter Initiative | O | FL |
| Universal Basic Future P.A.C. | N | CA |
| Universal Basic Solutions | N | CA |
| Universal Health Care Political Action Committee | V | PA |
| Universal Health Services Employees' Good Government Fund | Q | PA |
| Universal Leaf Tobacco Company, Incorporated Political Action Committee (Federal) | Q | VA |
| Universal Liberty Alliance | N | MD |
| Universal Music Group Employee Action Fund | Q | CA |
| Universal Party | X | NY |
| Universal Technical Institute INC. PAC (Utipac) | Q | AZ |
| University of South Alabama Federal PAC | N | AL |
| University Public Issues Committee Aka Upic | Q | IL |
| Univision Communications INC. Political Action Committee | Q | CA |
| Unleash America PAC | O | VA |
| Unlimited Justice PAC | O | GA |
| Unpac America | O | DC |
| Unseat Pelosi PAC | U | CA |
| Uns Energy Corporation PAC (Uns Energy Pac) | Q | AZ |
| Unterman for Congress, INC. | H | GA |
| Untide States of America | P | OK |
| Untitled America | V | WA |
| Unum Group Political Action Committee (Unumpac) | Q | TN |
| Unyte America | N | CA |
| Up | P | IA |
| U-PAC | N | WY |
| Upfield US INC. Political Action Committee | N | DC |
| Upgrade | O | MA |
| Uphold America | O | WI |
| Uplift Our Future | O | CA |
| Uplift PAC | N | MI |
| Up PAC | V | CA |
| Upper Hand Fund | Q | VA |
| Upright PAC | V | MA |
| Upset the Setup | Q | DC |
| Upshur County Republican Executive Committee | X | WV |
| Upstate New York Fighters | N | NY |
| Upstate Patriots PAC | O | WI |
| Upstate Sc PAC | N | VA |
| Upstate Strong | O | VA |
| Upstate Values PAC | N | DC |
| Upstate Victory Fund | S | MA |
| Upton for All of US | H | MI |
| Upton Victory Committee | N | VA |
| Upward Opportunity PAC | O | CO |
| Upward Super PAC, LLC | O | GA |
| Urban Citizens United | O | LA |
| Urban Development Fund | O | CA |
| Urban Empowerment Action PAC, INC. | O | DC |
| Urban Engineers, INC. PAC | N | PA |
| Urban Green PAC | V | NY |
| Urban Inroads | O | LA |
| Urban Michiganders for Trump | O | MI |
| Urban Progress Leadership PAC | N | IL |
| Urban Progress PAC | O | SC |
| Urban Red Political Action Committee | V | DC |
| Urban Reimagine Educate Deploy PAC | N | MD |
| Urban Republicans | O | PA |
| Urban Victory Fund (Uvf) | O | LA |
| Urbina for Congress | H | FL |
| Urbina for Congress | H | MD |
| Ureste 4 Congress | H | TX |
| Urgent Care Association Political Action Committee | N | IL |
| Ur-Nammu | H | LA |
| Uropartners LLC PAC | Q | IL |
| Ursa Major Technologies INC PAC (Ursa Major Pac) | N | CO |
| Usacs PAC | Q | OH |
| USA Farmworker PAC | Q | NY |
| USA First | N | FL |
| U.S.A. for Childcare | O | ME |
| USA Freedom Fund | O | OH |
| US-Africa Trade and Civic Relations | V | DC |
| Usagainstalzheimer'S PAC | Q | VA |
| USA Leadership Fund | O | VA |
| Usamerica.Us | N | TN |
| Usana Health Sciences, INC PAC | N | UT |
| U.S. Anesthesia Partners, INC. PAC D/B/A/ Usap PAC | Q | TX |
| USA PAC LLC | N | RI |
| US Apple Association Political Action Committee; Aka Usapple PAC | Q | VA |
| U.S.A. President Gi Odi Committee Education, INC. | P | NV |
| USA Redemption Party | X | GA |
| USA Restored | N | FL |
| USA Rice Federation PAC | Q | VA |
| US Arms | N | GA |
| USA Super PAC | O | IN |
| USA Super PAC INC | O | IN |
| USA Term Limits | O | AR |
| USA Vote for Freedom Organization Super PAC, INC | O | OK |
| USA Way Alliance | N | NY |
| U.S. Bancorp Federal Political Action Committee | Q | DC |
| U.S. Bancorp Political Participation Program | Q | DC |
| US Chamber of Commerce | I | DC |
| US Chamber of Commerce | E | DC |
| US Christian Citizens PAC | Q | AL |
| US Citizens for Political Action | O | CA |
| US Citizens PAC | V | CA |
| U.S. Concealed Carry Association for Saving Lives | O | WI |
| US Council on Real Estate | V | DC |
| U.S.-Cuba Democracy Political Action Committee | Q | FL |
| US Ecology, INC. Political Action Committee (Use Pac) | Q | ID |
| US Energy PAC (The PAC of American Exploration & Production Council, Inc.) | N | DC |
| US Federal Blockchain PAC | V | NJ |
| US First PAC LLC | O | FL |
| U.S. Future Fund | O | MI |
| U S Governance Senate Kabir | S | NJ |
| U S Immigration Reform PAC | Q | VA |
| US Impact PAC | N | TX |
| US Independent Conservative Party | H | NY |
| US Independent Democrat | S | NY |
| Usinpac | Q | VA |
| US in the Senate | S | AL |
| U.S. Israel Friendship PAC | O | DC |
| U.S. Israel PAC (Usi Pac) | Q | FL |
| US Korean Republicans | N | IL |
| Usman Ghumman for Senate | S | NJ |
| Usmc | U | AZ |
| Usmc Northey | X | AZ |
| US-Mellorism | P | AK |
| U.S. Mortgage Insurers Political Action Committee (Usmi Pac) | N | DC |
| U.S. of US | O | CA |
| US Oncology INC. Network Political Action Committee | Q | TX |
| Usopinion | O | TX |
| US Patriots Against Biden INC. | N | WY |
| U.S. Physical Therapy, INC. PAC | N | TX |
| US Radiology Specialists PAC | Q | NC |
| US Renal Care PAC | N | TX |
| US Rice Producers Association PAC | Q | DC |
| US Senatorial Campaign Committee for Obaidul Huq Pirjada | S | CA |
| U.S. Super PAC | O | MA |
| US Term Limits | V | LA |
| Ustomorrow PAC | N | DC |
| US Transportation, Energy & Technology Alliance PAC (Go-By Usteta Pac) | O | DC |
| U.S. Travel Association PAC | Q | DC |
| US Venture INC US PAC | Q | WI |
| US Veterans Assistance Foundation | O | WI |
| U.S. Veterans for Ukraine INC. | I | NJ |
| Usw Works | O | PA |
| Utah Bankers Association Action PAC | Q | UT |
| Utah First PAC | N | UT |
| Utah Love PAC | N | VA |
| Utah Medical Political Action Committee | Q | UT |
| Utahns for Liberty | O | WI |
| Utah Republican Party | Y | UT |
| Utah Senate Republican Nominee Fund | N | DC |
| Utah State Democratic Committee | Y | UT |
| Utam Paul Better Government Caucus | H | MD |
| Utam Paul for Congress | H | MD |
| Utepac | V | UT |
| Uthman Ibrahim | H | IL |
| Utilitarianism for USA | P | FL |
| Utility Workers Union of America Cope | Q | DC |
| Utility Workers Union of America Political-Legislative Education Fund | O | DC |