| Oakes for Congress | H | PA |
| Oakhurst Democratic Club | N | CA |
| Oakland Corps PAC | O | DE |
| Oakland County Democratic Party | Y | MI |
| Oakland United Democratic Campaign (Oudc) | X | CA |
| Oakley for Congress | H | OK |
| Oakley for Congress | H | NJ |
| Oatice Thomas | P | FL |
| Oatice Thomas for President | P | FL |
| Oatman for Congress | H | CA |
| Oav Justice for All PAC | V | WA |
| Obernolte Victory Fund | N | CA |
| Oberweis for Il-14 | H | MD |
| Oberweis Victory Committee | N | MD |
| Observatory Group PAC | N | DC |
| Occidental Petroleum Corporation Political Action Committee | Q | DC |
| Occults for Tournament and Video Game N Tcg Reform | N | FL |
| Occupy Democrats Election Fund | O | DC |
| Occupy Dims | N | NY |
| Occupy Freedom PAC | N | CA |
| Ocean Champions | I | CA |
| Ocean Champions Political Action Committee | Q | CA |
| Oceanfirst Political Action Committee | Q | NJ |
| Ocean Majority PAC | O | CA |
| Ocean Shipholdings INC Political Action Committee | N | TX |
| Oceans PAC | Q | DC |
| Ocean Spray Cranberries INC. Political Action Committee | Q | MA |
| Ocean State Forward | O | DC |
| Ocean State PAC | O | VA |
| Ocean State Political Action Committee (Ospac) | Q | RI |
| Oc Jobs & Education | N | CA |
| O'Connor for Congress | H | OH |
| O'Connor for Congress | H | OH |
| O. C. Tanner Company Political Action Committee | Q | UT |
| Octavia Coleman for Congress | H | GA |
| Octeqi PAC | V | OH |
| O'Cull for Congress | H | KY |
| Oc Victory 2024 | N | CA |
| Oc Vision 2020 | O | CA |
| Oddo for Congress | H | SC |
| O'Dea for CO Senate Republican Nominee Fund 2022 | S | VA |
| O'Dear for US Senate | S | MO |
| O'Dea Victory Committee | N | AL |
| Odessans for Ethical Leadership | V | TX |
| Odonnell4california 2018 | H | CA |
| Odonnell4congress | H | CA |
| O'Donnell for Congress | H | NY |
| Odonnell for Liberty | S | NH |
| Odulate, Andalib Mimokunmi Thomas | H | MD |
| Offical Fund Raising Campaign INC | O | DC |
| Office and Professional Employees International Union (Opeiu) Jb Moss Voice of the Electorate (Vote) | Q | NY |
| Office of Quinci Pryce Jd Claremont | P | CA |
| Office of the Commissioner of Major League Baseball Political Action Committee | Q | DC |
| Office & Professional Employees International Union Local 30 | C | CA |
| Office & Professional Employees International Union (Opeiu) Local 2 Cope | Q | MD |
| Official 9th District Democratic Party | X | MI |
| Official Committee for Lirette to Flip Seat in Congress | H | CA |
| Official President Quinci Suave | P | CA |
| Official Trump Swag | N | UT |
| Offshore Marine Service Association PAC | Q | LA |
| Off the Sidelines PAC | Q | DC |
| of the People | V | CA |
| Oge Energy Corp Employees Political Action Committee | Q | OK |
| Oglesby for Congress | H | MO |
| Ogles for Tn-05 | H | MD |
| Oglethorpe County Democratic Committee | X | GA |
| Ogrady for Senate | S | SC |
| Oh-13 Future Fund | N | GA |
| Oh-13 Republican Nominee Fund 2022 | H | VA |
| O'Halleran Davids Victory Fund | H | AZ |
| O'Halleran Victory Fund 2020 | N | AZ |
| O'Halleran Victory Fund 2022 | N | AZ |
| Oh Amazing Grace | P | HI |
| Ohanian 2020 | P | CA |
| O'Hara for Ohio | H | OH |
| Ohio Accountability PAC | O | OH |
| Ohio Action Committee for Rural Electrification (Acre)/Ohio Rural Electric Cooperatives, INC./National Rural Electric Cooperative Association | Q | OH |
| Ohio Advocates for Freedom and Liberty PAC | O | OH |
| Ohio Afscme Retiree Chapter 1184 | C | OH |
| Ohio Ambulatory Surgery Centers PAC | N | OH |
| Ohioans for A Better Future | O | OH |
| Ohioans for Accountable Government | O | OH |
| Ohioans for A Healthy Economy Action Fund | O | OH |
| Ohioans for Conservative Values | O | VA |
| Ohioans for Economic Opportunity A Project of Sixteen Thirty Fund | I | DC |
| Ohioans for Jd | N | OH |
| Ohioans for Judicial Integrity (Ofji) | O | OH |
| Ohioans for Justice and Integrity | O | OH |
| Ohioans for Our Future PAC | O | MO |
| Ohioans for Parental Choice | O | OH |
| Ohioans United Action Fund | O | OH |
| Ohioans United for Public Education | I | OH |
| Ohio Arizona Victory Fund | S | WA |
| Ohio Association of Independent Title Agents Political Action Committee | N | OH |
| Ohio Bankers League Political Action Committee (Federal) | Q | OH |
| Ohio Battleground Alliance-Ohiowomen for Liberty, LLC | N | OH |
| Ohio Cattlemen'S Association PAC | Q | OH |
| Ohio Cd-04 Watch | N | OH |
| Ohio Cd-04 Watch | N | OH |
| Ohio Citizen Action | I | OH |
| Ohio Coal Association PAC | Q | OH |
| Ohio Coalition of Labor Union Women | I | OH |
| Ohio Conservative Project INC | O | VA |
| Ohio Conservatives for A Change | O | OH |
| Ohio Conservatives for A Change | O | VA |
| Ohio Conservative Victory Fund | N | IN |
| Ohio Corn and Wheat Growers Association PAC | Q | OH |
| Ohio Council 8 Afscme Afl-Cio | C | OH |
| Ohio Council for Home Care and Hospice Political Action Committee | N | OH |
| Ohio Credit Union League Political Action Committee | Q | OH |
| Ohio Dairy Producers PAC | N | OH |
| Ohio Democratic Hispanic_latino Caucus | N | OH |
| Ohio Democratic Party | Y | OH |
| Ohio Democrats for Democracy | N | OH |
| Ohio Dental Association Political Action Committee | Q | OH |
| Ohio D.R.I.V.E. (Democratic Republican Independent Voter Education - Teamsters Joint Council #41) | Q | OH |
| Ohio Environmental Council Action Fund INC. | I | OH |
| Ohio Environmental Council Action Fund PAC | N | OH |
| Ohio Farm Bureau Federation INC-Agriculture for Good Government PAC (Ofbf-Aggpac) | Q | OH |
| Ohio First PAC | O | VA |
| Ohio for Johnson | S | OH |
| Ohio Freedom Coalition | O | GA |
| Ohio Freedom Fund | O | DC |
| Ohio Freedom Fund Political Action Committee | O | WI |
| Ohio Future Fund, INC. | O | VA |
| Ohio Gas Association Federal PAC | N | OH |
| Ohio Gop Majority Fund | N | DC |
| Ohio Grassroots Victory Fund | N | DC |
| Ohio Green Party PAC | Y | OH |
| Ohio Gun Collectors Association Political Action Committee (Ssf) | Q | OH |
| Ohiohealth Star Corporation Political Action Committee Dba Ohiohealth PAC | Q | OH |
| Ohio in Action Super PAC | O | OH |
| Ohio Leads | O | OH |
| Ohio Maga Voters 2020 Political Action Committee | V | DC |
| Ohio Majority Trust | O | OH |
| Ohio Matters Leadership PAC | N | OH |
| Ohio National Financial Services Political Action Committee | Q | OH |
| Ohio Organizing Campaign | I | OH |
| Ohio Pennsylvania Victory 2024 | N | DC |
| Ohio Pennsylvania Victory Fund | S | DC |
| Ohio Petroleum Marketers and Convenience Store Association Pol Action Cmte (Opmca Pac) | N | OH |
| Ohio Poultry Association Political Action Committee | Q | OH |
| Ohio Prosperity Fund | V | DC |
| Ohio Provider Resource Association PAC | Q | OH |
| Ohio Realtors Political Advocacy Fund (Orpaf) | O | OH |
| Ohio Red to Blue 2020 | H | DC |
| Ohio Republican Leadership Fund | O | VA |
| Ohio Republican PAC | O | OH |
| Ohio Republican Party State Central & Executive Committee | Y | OH |
| Ohio Rhode Island Victory Fund | S | DC |
| Ohio Right to Life Society, INC. PAC | Q | OH |
| Ohio River PAC | O | WI |
| Ohio Rural Water Association PAC | N | OH |
| Ohio Senate Republican Nominee Fund | N | DC |
| Ohio Senate Victory 2022 | N | DC |
| Ohio Senate Victory 2024 | N | DC |
| Ohio Society of Oral and Maxillofacial Surgeons | N | OH |
| Ohio Soybean Association PAC | Q | OH |
| Ohio State Tea Party; the | O | OH |
| Ohio Strong | O | DC |
| Ohio Strong Action | O | OH |
| Ohio Today Tomorrow Forever | N | OH |
| Ohio Truth PAC | O | TX |
| Ohio Valley Conservatives | O | OH |
| Ohio Valley Construction Employers Council, INC. PAC | N | WV |
| Ohio Valley Leadership PAC | N | OH |
| Ohio Vapor Trade Association PAC | N | OH |
| Ohio Veterans for Harris | O | OH |
| Ohio Victory 2024 | N | DC |
| Ohio Victory Committee 2024 | N | VA |
| Ohio Victory Fund 2024 | N | VA |
| Ohio Voter Fund Political Action Committee | O | OH |
| Ohio Voters | O | WI |
| Ohio Wisconsin Victory 2024 | S | DC |
| Ohio Women Rising | O | OH |
| Ohio Women'S Alliance Action Fund | I | OH |
| Ohio Womens Alliance Action Fund | I | OH |
| Ohio Women'S Caucus | N | OH |
| Ohio Works | I | OH |
| Ohio Young Republican Federal PAC | N | OH |
| Ohio Young Republican Victory Fund | N | OH |
| Ohlone Area United Democratic Campaign | N | CA |
| Oh Mt Az Victory Fund | S | DC |
| Oh Pa Wi Victory Fund | S | DC |
| Oh Senate Republican Nominee Fund 2024 | N | VA |
| Oh Senate Republican Nominee Victory Fund | N | VA |
| Ohtaki for Congress | H | CA |
| Ohtaki for Congress | H | CA |
| Oh Tx 2024 | S | DC |
| Oil Export Club | O | DC |
| Oit | U | AZ |
| Ojai Valley Democratic Club | N | CA |
| Ojc PAC | N | OH |
| Ojeda for President | P | DC |
| Ojeda for Senate | S | WV |
| Ok-05 Victory Fund | N | OK |
| O'Keefe for President 2020 | P | PA |
| Okieway | O | OK |
| Oklahoma 1st Step PAC | N | OK |
| Oklahoma Association of Electric Cooperatives-Acre | Q | OK |