Mr Valeriu COSARCIUC Republic of Moldova Joined in 2001, left in 2009
Mr Ignacio COSIDÓ GUTIÉRREZ Spain Joined in 2004, left in 2008
Mr Charles-Henri de COSSÉ-BRISSAC France Joined in 1996, left in 1997
Mr Carlos COSTA NEVES Portugal EPP/CD Joined in 2011, left in 2016
Ms Celeste COSTANTINO Italy SOC Joined in 2013, left in 2016
Ms Yolaine de COURSON France ALDE Joined in 2018, left in 2022
Mr Corneliu-Mugurel COZMANCIUC Romania EPP/CD Joined in 2013, left in 2025
Mr William CRAIG United Kingdom Joined in 1977, left in 1979
Mr James CRAIGEN United Kingdom Joined in 1976, left in 1980
Ms Viola von CRAMON-TAUBADEL Germany SOC Joined in 2010, left in 2014
Lord Thomas L. CRATHORNE United Kingdom Joined in 1959, left in 1965
Mr David CRAUSBY United Kingdom SOC Joined in 2013, left in 2017
Mr Aidan CRAWLEY United Kingdom Joined in 1949, left in 1950
Ms Stella CREASY United Kingdom SOC Joined in 2017, left in 2020
Mr Vítor Pereira CRESPO Portugal Joined in 1986, left in 1988
Mr Vladimiro CRISAFULLI Italy SOC Joined in 2008, left in 2013
Mr Andi-Lucian CRISTEA Romania SOC Joined in 2021, left in 2025
Mr Julian CRITCHLEY United Kingdom Joined in 1972, left in 1979
Ms Andreja ČRNAK MEGLIČ Slovenia SOC Joined in 2012, left in 2014
Mr Charles Anthony Raven CROSLAND United Kingdom Joined in 1950, left in 1951
Mr Richard CROSSMAN United Kingdom Joined in 1953, left in 1953
Mr Zsolt CSENGER-ZALÁN Hungary EPP/CD Joined in 2014, left in 2022
Mr Vlad CUBREACOV Republic of Moldova Joined in 1996, left in 2009
Mr Alexandru Răzvan CUC Romania SOC Joined in 2019, left in 2019
Mr Álvaro CUESTA MARTÍNEZ Spain Joined in 1983, left in 1984
Mr Jaroslav CUHRA Czechoslovakia Joined in 1990, left in 1993
Mr John CUMMINGS United Kingdom Joined in 1992, left in 1997
Mr Lawrence CUNLIFFE United Kingdom Joined in 1992, left in 2001
Sir Knox CUNNINGHAM United Kingdom Joined in 1956, left in 1959
Ms Claire CURTIS-THOMAS United Kingdom Joined in 2008, left in 2010
Mr Grzegorz CZELEJ Poland EC/DA Joined in 2012, left in 2020