| Crumpton for Alabama | S | AL |
| Crusaders | N | GA |
| Crush Maga PAC | W | DC |
| Crushpac | N | CA |
| Cruz 20 for 20 Victory Fund | N | TX |
| Cruz 25 for 22 Victory Fund | N | TX |
| Cruz Fletcher for Congress LLC | H | GA |
| Cruz for A Cause | H | IL |
| Cruz for President | P | TX |
| Cruz Senate Victory 2020 | N | TX |
| Cry Freedom PAC | N | CO |
| Cryolife, INC. PAC | Q | GA |
| Crypto / Bitcoin USA Super PAC | O | WY |
| Cryptocracy | N | KS |
| Cryptocurrency Alliance | O | DC |
| Crypto for America | N | CA |
| Crypto for Congress PAC | O | MI |
| Crypto for US | V | VA |
| Crypto Foundation of America | N | NJ |
| Crypto Freedom PAC | O | DC |
| Crypto Innovation | O | VA |
| Crypto PAC | O | WI |
| Cryptopac, INC. | O | MA |
| Crystal Cavalier Campaign Committee | H | NC |
| Crystal Vanuch for Congress | H | VA |
| Csl Employees Political Action Committee | Q | PA |
| Csrj | N | UT |
| Csx Corporation Good Government Fund | Q | DC |
| Ct-02 Republican Nominee Fund 2020 | N | MD |
| Ct-03 Republican Nominee Fund 2020 | N | MD |
| Ct-05 Republican Nominee Fund 2020 | N | MD |
| Ct-05 Republican Nominee Fund 2022 | N | VA |
| Ctc Action | O | NY |
| Ct Dream Team | H | WI |
| Cte Amanda Le'Anne Brunzell for Congress | H | MI |
| Cte Ralph Godbee for Congress | H | MI |
| Ctia - the Wireless Association Political Action Committee | Q | DC |
| Ct Senate Republican Nominee Fund 2022 | N | VA |
| Ct Volunteers | N | CT |
| Ct Working Families Federal PAC D/B/A Take Back Congress Ct | X | CT |
| Cubbler for Congress | H | TX |
| Cubic Corporation Employees' Political Action Committee | Q | CA |
| Cuellar for New York | H | NY |
| Cuellar Victory Fund | N | DC |
| Cuevas Presidential Committee | P | FL |
| Cufi Action Fund | I | DC |
| Culac the PAC of Credit Union National Association | Q | DC |
| Culberson for Congress | H | TX |
| Culberson Victory Committee | N | TX |
| Culinary Workers Union Local 226 | C | NV |
| Cullen 4 Congress | H | NJ |
| Culley Congressional Committee | H | TX |
| Cullop for Congress | H | VA |
| Culpeper County Democratic Committee | X | VA |
| Culpeper County Democratic Committee | X | VA |
| Culpeper Republican Committee | X | VA |
| Culp for Congress | H | WA |
| Culver City Democrats United | N | CA |
| Cumberland Farms INC. Political Action Committee | Q | MA |
| Cumberland Pharmaceuticals INC. Health and Wellness PAC | N | TN |
| Cummings 4 Congress | H | UT |
| Cummings, Clifford R. | I | CA |
| Cummings for Congress | H | IN |
| Cummings for Congress | H | NY |
| Cummings for Congress Campaign Committee | H | MD |
| Cummings for President | P | UT |
| Cummins-Allison Corp Employees for Good Government | Q | IL |
| Cummins INC. Political Action Committee (Cipac) | Q | DC |
| Cuna Mutual Holding Company Political Action Committee (Cuna Mutual Pac) | Q | WI |
| Cunningham for Congress | H | CA |
| Cunningham for Congress | H | WI |
| Cunningham Harrison Victory Fund | S | DC |
| Cunningham Hegar Victory Fund | S | DC |
| Cunningham Hickenlooper Victory Fund | S | CO |
| Cunningham Kelly Gideon Greenfield Challengers 2020 (Challengers 2020) | S | DC |
| Cunningham Spanberger Victory Fund | H | DC |
| Cunningham Victory Fund | N | SC |
| Cunningham Victory Fund 2020 | N | SC |
| Cuomo Ny Take Back the House | N | NY |
| Cura Strategies PAC | N | VA |
| Curbelo Victory Committee | N | GA |
| Cure America Action INC. | I | DC |
| Cure America PAC | N | VA |
| Cure USA | O | WA |
| Curo Financial Technologies Corp. PAC (Curo Pac) | N | KS |
| Curran for Senate | S | MI |
| Curran for Senate | S | IL |
| Curt Andrew Zygmond Sr | H | MT |
| Curtis A. Green for Congress | H | NJ |
| Curtis Bashaw for US Senate, INC. | S | NJ |
| Curtis Calabrese for Congress | H | FL |
| Curtis Clark for Michigan | H | MI |
| Curtis for Congress | H | UT |
| Curtis for Congress | H | DE |
| Curtis for Ut Senate Republican Nominee Fund 2024 | S | VA |
| Curtis Green for Congress | H | NJ |
| Curtis Joseph Sobie 2020 | H | NC |
| Curtis R Rogers US Congress District 15 Fl | H | FL |
| Curtiss Wright Corporation Employees Political Action Committee | Q | NC |
| Curt Nichols for President | P | CA |
| Curt Nisly for Congress | H | IN |
| Cut the Bull PAC | N | VA |
| Cuyahoga County Future PAC | N | OH |
| Cvd Victory Fund | H | VA |
| Cvs Health PAC | Q | DC |
| C.V. Starr & CO. INC. Political Action Committee | N | NY |
| C. Wesley Morgan for Kentucky | S | KY |
| Cyber Party | H | CT |
| Cyber War Room | N | MI |
| Cynthia Dianne Steel for Congress | H | NV |
| Cynthia J Breyman for Congress | H | TX |
| Cynthia Wallace for Congress | H | NC |
| Cynthia Wallace Victory Fund | N | NC |
| Cypress Creek Holdings LLC Solar PAC | Q | CA |
| Cyrus Sajna for Congress Committee | H | TX |
| Czech-American Voter Outreach | N | IL |