- Cadden, Joan
- Cagle, Casey
- Calderon, Felipe
- Callahan, John
- Calvert, Ken
- Camp, Dave
- Campbell, Ben Nighthorse
- Campbell, Bill
- Campbell, James W
- Campbell, John
- Campbell, Larry
- Campbell, Tom
- Cane, Rudolph C.
- Cannon, Chris
- Cantor, Eric
- Cantwell, Maria
- Capito, Shelley Moore
- Capps, Lois
- Capuano, Michael E
- Cardenas, Tony
- Cardin, Benjamin L.
- Cardoza, Dennis
- Carey, Bernard
- Carnahan, Jean
- Carnahan, Russ
- Carona, Michael
- Carper, Thomas
- Carson, Brad
- Carson, Julia
- Carter, Charles
- Carter, Jimmy
- Carter, Kenneth
- Carter, Rosalynn
- Castillo, Susan
- Castle, Michael N
- Castro, Fidel
- Castro, Raul
- Cedillo, Gil
- Chabot, Steve
- Chafee, Lincoln
- Chambers, Ernie
- Chambliss, Saxby
- Chan, Wilma
- Chapin, Linda
- Chase, Cheryl
- Cheney, Dick
- Cheney, Lynne
- Cherry, Bob
- Chertoff, Michael
- Chick, Laura
- Christian, Mary T
- Chu, Judy
- Chu, Steven
- Clagett, Virginia P
- Clark, James
- Clark, Karen
- Clark, Larry
- Clark, Mark
- Clark, Paul
- Clark, Ron
- Clark, Wesley
- Clark, William
- Clay, Wm Lacy
- Clayton, Robert
- Cleland, Max
- Clements, James
- Cleveland, Grover
- Clinton, Bill
- Clinton, Hillary
- Clyburn, James E
- Coan, Michael
- Coble, Howard
- Cochran, Thad
- Codey, Richard J
- Coffin, William Sloane
- Cogdill, Dave
- Cohen, Michael
- Colburn, Richard F
- Cole IV, William H.
- Coleman, Tom
- Collins, Michael J
- Collins, Susan
- Colton, William
- Connell, Jack
- Connor, Martin
- Connors, John
- Conrad, Kent
- Constantine, Lee
- Conte, James D
- Conway, Joan Carter
- Conway, Norman H
- Conyers, John Jr
- Cook, Mary
- Cook, Robert
- Cooksey, John
- Cooley, Steve
- Coolidge, Calvin
- Cooper, Jon
- Cooper, Sharon
- Correa, Lou
- Corzine, Jon
- Costa, Jim
- Courtney, Joe
- Cox, Christopher
- Cox, Dave
- Cox, Kevin
- Cox, M Kirkland
- Craddick, Tom
- Craig, Larry
- Crane, Bill
- Crane, Phil
- Crawford, Robert
- Creighton, Thomas C.
- Crenshaw, Ander
- Crisco, Joseph J Jr
- Crist, Charlie
- Croft, Eric
- Cronin, Dan
- Cross, Tom
- Crotty, Rich
- Crowley, John
- Crowley, Joseph
- Cruz, Angel
- Cryor, Jean B.
- Cummings, Elijah E
- Cunningham, Don
- Cunningham, Randy
- Currie, Barbara Flynn
- Currie, Ulysses
- Curry, Bill