| U Against Hawley PAC | N | DC |
| U a Local 85 Political Action Committee | Q | MI |
| Uamv Action | O | WY |
| U.a. Plumbers & Steamfitters Local No. 22 P.A.C. | Q | NY |
| Ua Progressive Action | N | OH |
| Ua Union Plumbers & Pipefitters Vote! PAC (United Association of Journeymen and Apprentices of the Plumbing & Pipefitting Industry of the United States and Canada) | Q | MD |
| Ua Union Plumbers & Pipefitters Vote! PAC (United Association of Journeymen and Apprentices of the Plumbing & Pipefitting Industry of the United States and Canada) PAC | Q | OR |
| UAW Education Fund | O | MI |
| UAW National Cap | C | MI |
| UAW Region 1 Cap | C | MI |
| UAW - V - Cap (UAW Voluntary Community Action Program) | Q | MI |
| Uberpac | V | MN |
| UBS Americas Inc. Political Action Committee (UBS PAC) | Q | CT |
| Ubuntu PAC | O | CA |
| Uca Action | I | OH |
| U Can't Believe Mitch | O | KY |
| Uca Political Action Committee | N | OH |
| Ucb, Inc. Political Action Committee | Q | CA |
| Ucomm PAC | N | NY |
| Udall for US All | S | NM |
| Udc1, LLC // KW Miller Congressional Committee | H | FL |
| Uehlinger for Congress | H | PA |
| Uep of Maryland | X | MD |
| Ufcw Local 1776 | I | PA |
| Ufcw Local 1776Ks | C | PA |
| Ufcw Local 227 Working Families Fund | O | KY |
| Ugi Corporation Political Action Committee(Ugi/PAC) | Q | PA |
| Uidp Committee | S | NY |
| Ullico Inc. Political Action Committee (Ullipac) | Q | DC |
| Ulrich Neujahr for President | P | CT |
| Ultra Electronics USA Group Inc PAC (Ultra Electronics USA PAC or Ueusa PAC) | Q | CT |
| Ultragenyx Pharmaceutical Inc. Political Action Committee (Aka Ultragenyx PAC) | N | CA |
| Ultraviolet Action | I | DC |
| Ultraviolet PAC | O | DC |
| Umberger for Congress | H | WV |
| Umbrella PAC | N | CA |
| Unaka Company Political Action Committee | N | TN |
| Unbelievable William Farms | H | OH |
| Unbossed Project | N | PA |
| Uncompromised Freedom PAC | V | CA |
| Unconditional Security PAC | V | FL |
| Underdog Sports Holdings, Inc. Political Action Committee (Underdog PAC) | N | VA |
| Underground Contractors Association PAC | N | IL |
| Underwood Barnes Victory Fund | S | DC |
| Underwood Casten Joint Victory Fund | H | DC |
| Underwood Foster Victory Fund | H | DC |
| Undivided Purpose | O | PA |
| Undoing the Biden Damage | N | HI |
| Unfit to Serve | N | IA |
| Unger for Congress | H | WV |
| Unicorn Party | X | AZ |
| Unicratic Party | X | CA |
| Unidos | N | AZ |
| Unidosus Action Fund | I | DC |
| Unidosus Action PAC | O | DC |
| Unidos We Win PAC | O | MN |
| Unified Libertarians of Massachusetts | X | MA |
| Unifi, Inc Political Action Committee | N | NC |
| Uniformed Firefighters Association of New York Political Action Committee (Fire PAC) | Q | NY |
| Unify Colorado | O | VA |
| Unify PAC | V | WI |
| Unigroup Inc Political Action Committee | Q | MO |
| Union 2020 | O | DC |
| Union County Democratic Committee | X | NJ |
| Union County Democratic Committee | X | PA |
| Union County GOP | X | NC |
| Union County United | N | NJ |
| Union Home Mortgage Corp. Political Action Committee | N | OH |
| Union Pacific Corp. Fund for Effective Government | Q | DC |
| Union Township Democratic Municipal Committee | X | NJ |
| Unison Marketplace, Inc. Acquisition and Reform PAC | N | VA |
| Unisys Corporation Associates PAC | Q | VA |
| Unitas | O | PR |
| Unit Corporation Federal Political Action Committee (or Unit Corporation Federal PAC) | N | OK |
| Unite All Americans | N | WY |
| Unite America | W | CO |
| Unite America Election Fund | O | CO |
| Unite America Movement Inc; the | O | CT |
| Unite America Reform Fund | O | CO |
| Unite and Prosper | O | VA |
| United 2024 | O | VA |
| United Aapi Small Business Owners PAC | O | NV |
| United Advanced Practice Registered Nurses of Georgia PAC | N | GA |
| United Against White Supremacy | O | AZ |
| Unitedag Federal PAC | N | CA |
| Unitedagpac | N | CA |
| United Airlines, Inc. Political Action Committee (Uapac) | Q | IL |
| United Alliance of America | O | GA |
| United American Veterans PAC | O | FL |
| United America Party | X | IL |
| United Association of J/M & Appr. of PLBG & P/F Industry | I | MD |
| United Association of J/M & Appr. of Plumbing & P/F Industry | C | MD |
| United Association of Journeymen & Apprentices of the U.S. & Canada Local 447 Federal PAC | Q | CA |
| United Association of Plumbers and Pipefitters Local #773 Voluntary PAC Fund | Q | NY |
| United Association Plumbers and Pipefitters Local 469 Federal Political Action Committee (Arizona Pipe Trades Fed PAC) | Q | AZ |
| United Assoc Local 50 Plumbers and Steamfitters Political Action Fund | Q | OH |
| United Avance California Democratic Federation | N | CA |
| United Breast Cancer Support PAC | O | GA |
| United Brotherhood of Carpenters and Joiners | C | DC |
| United Brotherhood of Carpenters & Joiners of America Eastern Atlantic States Regional Council of Carpenters Federal Legislative Improvement Committee | N | PA |
| United Brotherhood of Carpenters & Joiners of American Local 1024 P a C | Q | PA |
| United by Freedom | O | NM |
| United Catcher Boats PAC | Q | WA |
| United Change | X | CO |
| United Citizens Party | P | CA |
| United Civic Engagement Forum | N | IL |
| United Coalition for Hip Hop Culture | O | NC |
| United College Park | N | GA |
| United Colleges and University's for Titus James Henry US President I2020 | P | CA |
| United Community Bankers PAC (Bancfirst Corp) | Q | OK |
| United Community Coalition | V | NY |
| United Democracy Project | O | DC |
| United Democratic Women | V | AZ |
| United Democrats Fund | O | NH |
| United Democrats San Gabriel Valley | Y | CA |
| United Domestic Workers of America Independent Expenditure PAC | C | CA |
| United Egg Association Eggpac | Q | GA |
| Unitedemocrats PAC | W | NC |
| United Empowerment Party | X | PA |
| United Empowerment Party - Georgia | X | PA |
| United Emrits of America | P | TX |
| United Food and Commercial Workers International Union Active Ballot Club | Q | DC |
| United Food and Commercial Workers International Union Local 400 PAC | Q | MD |
| United Food and Commercial Workers International Union Working Families Advocacy Project | O | DC |
| United Food and Commercial Workers Local 1776Ks PAC | Q | PA |
| United Food and Commercial Workers Local 951 PAC | Q | MI |
| United Food and Commercial Workers Western States Council | C | CA |
| United Food & Commercial Workers International Union | C | DC |
| United for America | V | VA |
| United for America PAC | N | NJ |
| United for a US Senate Majority | N | GA |
| United for Better | O | NY |
| United for Burch Hulsey | H | AR |
| United for Change | O | NY |
| United for Common Sense | O | FL |
| United for Democracy | I | MA |
| United for Liberty PAC | N | RI |
| United for Massachusetts | N | MA |
| United for Our Future | V | NC |
| United for Progress | O | NC |
| United for Progress Leadership Committee | N | IL |
| United for Progress PAC | O | DC |
| United for South Florida | O | DC |
| United for USA | N | CA |
| United Forward 2020 Benzel for Congress | H | CA |
| United Forward PAC | O | DC |
| United Fresh Produce Association Fresh Political Action Committee (Fresh PAC) | Q | DC |
| United Health Foundation of America | O | CT |
| Unitedhealth Group Incorporated PAC (Unitedhealth Group PAC) | Q | DC |
| United Health Services PAC | Q | GA |
| United Independents Campaign Fund | O | MD |
| United Independents Win PAC | N | MD |
| United in Freedom | Q | NY |
| United Labor Party | P | AL |
| United Liberty Front | O | WI |
| United Medical Freedom Super PAC | O | TN |
| United Mine Workers of America - Coal Miners Political Action Committee | Q | VA |
| United Mine Workers of America Power PAC | O | VA |
| United Motorcoach Association Political Action Committee: Aka Motorcoach Travel PAC | N | VA |
| United National Committee | N | CO |
| United Nepali Political Action Committee | N | VA |
| United Parcel Service Inc. PAC | Q | GA |
| United Patriot PAC | V | MN |
| United Patriots of America | O | PA |
| United People for Good Government | N | CA |
| United People's Party | S | CA |
| United People Super PAC | U | DC |
| United Pilots PAC/United Airlines Master Executive Council | Q | IL |
| United Police Officers Association | O | MD |
| United Police Officers Fund PAC | O | DC |
| United Political Action Committee | Q | IL |
| United Postmasters and Managers of America Political Fund (Upma PAC) | Q | VA |
| United Rural Democrats of America | N | IL |
| United Services Automobile Association Employee PAC - USAA Employee PAC | Q | TX |
| United Stands America | N | DC |
| United States Beet Sugar Association Political Action Committee | Q | DC |
| United States Cellular Corporation Political Action Committee | Q | IL |
| United States Citizen African Immigrants | N | MD |
| United States Congress Joint Advisory Committee | N | DC |
| United States Constitutional Freedom Coalition | O | MI |
| United States Cuba Now Political Action Committee | N | NY |
| United States Equalitarian Party (Usep) Committee | X | VA |
| United States-India Relationship Council | N | CA |
| United States of America Government | P | FL |
| United States of Trump | U | NY |
| United States Peanut Political Action Committee (US Peanut PAC) | Q | DC |
| United States People to Elect Gary D Disney | P | WA |
| United States Pirate Coopertive Association | N | MA |
| United States Steel Corporation Political Action Committee | Q | PA |
| United States Sugar Corporation Employee Stock Ownership Plan Political Action Committee, | Q | FL |
| United States Telecom Association Political Action Committee (Telecompac) | Q | DC |
| United States United Under James Titus the Great Law for President 2020 | P | CA |
| United Steel, Paper and Forestry, Rubber, Manufacturing, Energy, Allied Industrial and Ser | C | PA |
| United Steelworkers Local 420-a PAC | Q | NY |
| United Steelworkers Political Action Fund | Q | PA |
| United Strategies Group Politcal Action Committee | N | NV |
| United Strategies Group Political Action Committee | N | NV |
| United Students Fund | O | NY |
| Unitedtech Governance Coalition for National Politics and Legislation | N | CA |
| Unitedtech Governance Coalition for National Politics & Legislation | H | NV |