| Oregon Bankers Political Action Committee | Q | OR |
| Oregon Blue Victory Fund | N | DC |
| Oregon Farm Bureau Federation Federal PAC Ofbfpac | Q | OR |
| Oregon Fight Club SUPERPAC | O | OR |
| Oregon for Progress PAC | O | DC |
| Oregon Frontier PAC | N | VA |
| Oregonians for America | N | OR |
| Oregonians for Better Government | N | OR |
| Oregonians for Truth and Accountability PAC | O | OR |
| Oregon Massachusetts Victory Fund | N | DC |
| Oregon Progressive Delegates | O | OR |
| Oregon Republican Party | Y | OR |
| Oregon Right to Life Victory PAC | O | OR |
| Oregon Senate Republican Nominee Fund | N | DC |
| Oregon Victory Fund | N | OR |
| O'Reilly for Congress | H | NY |
| Or Elects Women | H | DC |
| Oren Clark for President | P | NY |
| Orentlicher for Congress | H | IN |
| Oreta for Congress 2020 Committee | H | AS |
| Organic Trade Association PAC (Organic Pac) | N | DC |
| Organization of Staff Analysts PAC | Q | NY |
| Organize Arizona! | O | AZ |
| Organize Blue | O | IA |
| Organized for Action | V | GA |
| Organized Republicans for Change | O | FL |
| Organize for Progress | N | IL |
| Organize Now | I | FL |
| Organizers in the Land of Enchantment | I | NM |
| Organizing Empowerment PAC | O | WI |
| Organizing for A Better Tomorrow | V | DE |
| Organizing for Bernie - Draft Bernie | N | CO |
| Organizing for Progress | N | CA |
| Organogenesis INC. Political Action Committee, A/K/A Organopac | N | MA |
| Organon & CO. Employee Political Action Committee | Q | DC |
| Orgw3 | N | OK |
| Oristian for Congress | H | CA |
| O'Rourke Victory Committee | N | NY |
| Orozco2020 Committee for | H | TX |
| Orrick Herrington & Sutcliffe, LLP Federal PAC | Q | CA |
| Or Senate Republican Nominee Fund 2022 | N | VA |
| Ortega for Congress | H | CA |
| Ortega-McCarron Get to Work for Freedom Presidential Campaign | P | WA |
| Orthocarolina Pa Federal PAC | N | NC |
| Orthodox Vote | O | VA |
| Ortiz for Congress | H | NY |
| Ortiz for Congress Committee.Inc | H | FL |
| Ortt for Congress | H | NY |
| Osborn for Senate | S | NE |
| Oscar B. Hilliker for President | P | MI |
| Oscar Ortiz for Congress | H | CA |
| Osceola County Republican Executive Committee - Federal | X | FL |
| Oseguera 2020 | H | NJ |
| O'Shea for Congress | H | NC |
| O'Shea for Congress | H | IL |
| Oshkosh Corporation Employees PAC (Ocepac) | Q | WI |
| Osi Systems INC PAC Osi PAC | Q | VA |
| Osorio for Congress | H | CA |
| Ossoff Victory Fund | N | DC |
| Ossoff-Warnock Victory Fund | N | DC |
| Osun for Ny | H | NY |
| Oswaldo J. Requena for 23rd District Representative | H | FL |
| Ota for Congress | H | CA |
| Otaku Party Alliance | X | MD |
| Other Things | O | TX |
| Otis Worldwide Corporation Political Action Committee | N | CT |
| Otsego County Republican Committee | X | NY |
| Otsuka America Pharmaceutical INC. Political Action Committee (Otsuka US Pac) | Q | MD |
| Otter Tail Corporation Political Action Committee | N | MN |
| Otto for Alaska | H | AK |
| Otto for Congress | H | CA |
| Our America | O | IL |
| Our American Century | O | VA |
| Our American Future PAC | O | WI |
| Our American Principles PAC INC | O | FL |
| Our America PAC | O | UT |
| Our America PAC | V | FL |
| Our Atlantic City | O | NJ |
| Our Black Party | V | MD |
| Our Blue Democracy | N | FL |
| Our Blue Nation | N | CA |
| Our Blue Nation | N | DC |
| Our Children Not Yours PAC | V | FL |
| Our City Our Future PAC | O | FL |
| Our Colorado PAC | O | CO |
| Our Common Future PAC | O | DC |
| Our Community First Action INC | I | TX |
| Our Conservative Texas Future | O | TX |
| Our Conservative View | N | FL |
| Our Courts Project PAC | V | DC |
| Our Democracy PAC | O | CO |
| Our Democracy USA | N | WI |
| Our Everyday PAC | N | IL |
| Our Families First | O | VA |
| Our Family Values | I | DC |
| Our Fight Our Future | N | TX |
| Our Founding Principles | O | NV |
| Our Freedom PAC | N | NY |
| Our Freedoms | N | MO |
| Our Friend Brandaun | S | PA |
| Our Friend Brandaun , Douglass Commonwealth, U.S. Senator | S | DC |
| Our Future in America, INC. | O | CA |
| Our Future Is Black PAC | O | CA |
| Our Future, Our Fight PAC | O | VA |
| Our Future Super PAC | N | TX |
| Our Future United | O | DC |
| Our Global Commons Action Fund | N | CO |
| Our Great Task, INC. | O | VA |
| Our Guy for Congress | H | PA |
| Our Guy'S Victory Fund | N | PA |
| Our Hawaii PAC | V | HI |
| Our Hudson PAC | O | NY |
| Our Land Our Water Our Future | N | IA |
| Our Mother the Sea | O | NM |
| Our Ms. Brooks for President | P | MN |
| Our Nation Our Republic | N | PA |
| Our Nation United | O | CA |
| Our Nm Future PAC, INC. | O | DC |
| Our Path Forward | O | FL |
| Our President | U | CA |
| Our Revolution | I | DC |
| Our Revolution Carteret County | N | NC |
| Our Revolution Illinois | N | IL |
| Our Revolution PAC | N | DC |
| Our Shared Values PAC | O | GA |
| Our South Jersey | O | NJ |
| Our States Matter PAC | V | RI |
| Our Time Is Now Mitchell 2020 | P | MA |
| Our United Resource PAC | O | NV |
| Our Values PAC | O | NM |
| Our Values Political Action Committee | O | NM |
| Ourvoice | O | CA |
| Our Voice Our Vote Arizona | U | AZ |
| Our Voice Our Vote Arizona PAC | O | AZ |
| Our Voice PAC | O | NV |
| Our Voices Matter | O | PA |
| Our Voices PAC | O | AZ |
| Our Votes Our Future PAC | O | DC |
| Ourvote USA | N | NY |
| Our Way of Life PAC | O | VA |
| Outdoor Advertising Association of America Political Action Committee | Q | DC |
| Outdoor Amusement Business Association INC Political Action Committee | Q | MA |
| Outdoor Industry Association PAC | Q | CO |
| Outfront Media INC Political Action Committee (Ofpac) | N | CA |
| Outfront Media LLC | I | CA |
| Outokumpu Stainless USA PAC (Otk Stainless USA Pac) | N | AL |
| Outpatient Endovascular and Interventional Society PAC (Oeis Pac) | N | FL |
| Outpatient Ophthalmic Surgery Society Political Action Committee | Q | CO |
| Outraise | O | NY |
| Outrider PAC | V | WI |
| Outsider PAC | O | MI |
| Outspoken Action | O | DC |
| Outstanding Object-Manipulators Getting Wins All Year | O | CA |
| Outstanding Object-Manipulators Getting Wins All Year (Oogway) | O | CA |
| Outvote PAC | O | MA |
| Overair, INC. Political Action Committee (Overair Pac) | N | CA |
| Overhaul PAC | U | GA |
| Overseas Shipholding Group INC PAC | Q | FL |
| Oversight Council of Florida | U | FL |
| Over the Target PAC | N | VA |
| Overton for Congress | H | WA |
| Ovide for Senate 2010 | S | NH |
| Ovintiv USA INC. PAC | Q | CO |
| Ovrsite PAC | O | CA |
| Owen4ussenate | S | WA |
| Owens Corning Better Government Fund | Q | OH |
| Owens for Congress | H | GA |
| Owens for Congress | H | UT |
| Owens for Ut-04 | H | MD |
| Owens-Illinois INC Employees Good Citizenship Fund | Q | OH |
| Owens & Minor, INC. Political Action Committee (Owens & Minor Pac) | Q | VA |
| Owl PAC | N | OH |
| Owls Federal PAC | N | CA |
| Owner-Operator Independent Drivers Assn INC Political Action Committee (Aka Ooida-Pac) | Q | MO |
| Oxbow Corporation Political Action Committee | Q | FL |
| Oz2022us | H | KY |
| Oz for Congress | H | FL |
| Oz for Pa Senate Republican Nominee Fund 2022 | S | VA |
| Oz Laxalt Victory Committee | S | VA |
| Oz Victory Fund | N | VA |