All members by alphabetical order
  • OBRADOVIĆ, Jasmina Substitute PolGroupGroup of the European People's Party (EPP/CD) flag-frSerbia
  • OBRADOVIĆ, Marija Representative PolGroupGroup of the European People's Party (EPP/CD) flag-frSerbia
  • OBRADOVIĆ, Žarko Representative PolGroupSocialists, Democrats and Greens Group (SOC) flag-frSerbia
  • OEHME, Ulrich Substitute PolGroupEuropean Conservatives Group and Democratic Alliance (EC/DA) flag-frGermany
  • OHLSSON, Carina Representative PolGroupSocialists, Democrats and Greens Group (SOC) flag-frSweden
  • OLÁH, Lajos Substitute PolGroupMembers not belonging to a Political Group (NR) flag-frHungary
  • ÓLASON, Bergþór Representative PolGroupGroup of the European People's Party (EPP/CD) flag-frIceland
  • OLEYNIKOV, Yury Substitute PolGroupMembers not belonging to a Political Group (NR) flag-frRussian Federation
  • OLLDAG, Kathrine Substitute PolGroupAlliance of Liberals and Democrats for Europe (ALDE) flag-frDenmark
  • OMTZIGT, Pieter Representative PolGroupGroup of the European People's Party (EPP/CD) flag-frNetherlands
  • OOMEN-RUIJTEN, Ria Substitute PolGroupGroup of the European People's Party (EPP/CD) flag-frNetherlands
  • O'REILLY, Joseph Representative PolGroupGroup of the European People's Party (EPP/CD) flag-frIreland
  • ORLANDO, Andrea Representative PolGroupSocialists, Democrats and Greens Group (SOC) flag-frItaly
  • ORTLEB, Josephine Substitute PolGroupSocialists, Democrats and Greens Group (SOC) flag-frGermany
  • ÖZDEMIR, İsmail Substitute PolGroupMembers not belonging to a Political Group (NR) flag-frTurkey