A native of Monahans in Ward County in West Texas, Casteel graduated in 1961 from Monahans High School.<ref name=lrl>{{cite web|url=http://www.lrl.state.tx.us/scanned/members/bios/TLO/79th_Casteel_Carter.pdf|title=House Membership: Representative Carter Casteel|publisher=Texas Legislative Reference Library|accessdate=July 29, 2020}}</ref> In 1965, Casteel received her Bachelor of Arts from the [[University of Texas at Austin|University of Texas]] at [[Austin]]. She subsequently procured her [[Master of Arts]] in 1971 from Texas State University, then known as Southwest Texas State University in San Marcos (the alma mater of [[Lyndon B. Johnson]]), and her [[Juris Doctor]]ate in 1985 from St. Mary's University School of Law in [[San Antonio]], Texas.<ref name=votesmart>{{cite web|url=http://votesmart.org/candidate/biography/49891/carter-casteel#.UwjHG8uPIfg|title=Carter Casteel's Biography|publisher=votesmart.org|accessdate=July 29, 2020}}</ref> | A native of Monahans in Ward County in West Texas, Casteel graduated in 1961 from Monahans High School.<ref name=lrl>{{cite web|url=http://www.lrl.state.tx.us/scanned/members/bios/TLO/79th_Casteel_Carter.pdf|title=House Membership: Representative Carter Casteel|publisher=Texas Legislative Reference Library|accessdate=July 29, 2020}}</ref> In 1965, Casteel received her Bachelor of Arts from the [[University of Texas at Austin|University of Texas]] at [[Austin]]. She subsequently procured her [[Master of Arts]] in 1971 from Texas State University, then known as Southwest Texas State University in San Marcos (the alma mater of [[Lyndon B. Johnson]]), and her [[Juris Doctor]]ate in 1985 from St. Mary's University School of Law in [[San Antonio]], Texas.<ref name=votesmart>{{cite web|url=http://votesmart.org/candidate/biography/49891/carter-casteel#.UwjHG8uPIfg|title=Carter Casteel's Biography|publisher=votesmart.org|accessdate=July 29, 2020}}</ref> |