| Edward J. Oettel December 2003 Mariam M. Ogundipe March 2000 Elizabeth M. Oguntayo July 2002 John Ogwyn June 2005 Armstrong Okafor November 2000 |
Joseph A. Orie April 2004 Alma O. Osborne December 1995 Maria E. Ostrom November 2005 Darrel S. Overcast May 2005 Frank R. Overton March 2001 |
| Eric O. Okinyi October 2003 Bart Oliver March 2005 Carol A. Olmstead June 2004 Julia Hansen O’Neil November 2006 Jack R. Opel June 2006 |
David O. Owak May 2006 Don Owens 2004 Eunice Owino September 1999 Joann Ownby May 2001 |