Notable people
Bill Anoatubby – Governor of the Chickasaw Nation since 1987
Vaughn Ary – Staff Judge Advocate to the Commandant of the United States Marine Corps
Nick Blackburn – former Minnesota Twins starting pitcher
Harry Brecheen – former Major League Baseball All Star pitcher; graduated from Ada High School; buried at Ada's Rosedale Cemetery
Josh Brecheen – U.S. representative for Oklahoma
Orel Busby – attorney, lived in Ada from 1912 until appointed Associate Justice of Oklahoma Supreme Court; returned to Ada after retiring from the court in 1937
Jeff Carpenter, musician and songwriter with the all Native American orchestral rock band Injunuity
Dan Cody – Baltimore Ravens linebacker; born in Ada
Johnson T. Crawford – Nuremberg trial judge
John Daversa – Grammy Award-winning jazz trumpeter, composer/arranger, bandleader, and educator
Denver Davison – attorney, lived in Ada from 1927 until appointed Associate Justice of Oklahoma Supreme Court in 1937; returned to Ada after retiring from the court in 1958
Douglas Edwards – first television network anchor
Lee Erwin – television writer
Josh Fields – former Major League Baseball infielder; born in Ada
Mark Gastineau – National Football League star, ECU graduate
Monte Hale – Western-genre film star; born in Ada
Johny Hendricks – UFC Welterweight Champion
Anthony Armstrong Jones – country music singer
David West Keirsey (1921–2013) – psychologist, developed the Keirsey Temperament Sorter; born in Ada
Robert S. Kerr – former Oklahoma Governor and long-time U.S. Senator; born in Ada
Steven Lawayne Nelson – American convicted murderer; born in Ada
Louise S. Robbins – Wisconsin Librarian of the Year (2001); named one of Oklahoma's 100 Library Legends; director of the School of Library and Information Studies at University of Wisconsin–Madison; author of two award-winning books; longtime resident of Ada and first woman city council member and mayor
Oral Roberts – evangelist, founder of Oral Roberts University; born near Ada.
Blaine Saunders – actress, The Middle
Blake Shelton – country music singer with multiple No. 1 hit songs, coach on The Voice
Jeremy Shockey – former NFL tight end; born and grew up in Ada
Leon Polk Smith – abstract artist known for his work with geometric painting; graduate of East Central University
Jerry Walker – major league pitcher and front office executive
Ron Williamson – minor league baseball player wrongly convicted and sentenced to death in 1988 in Ada for rape and murder but eventually exonerated. Subject of The Innocent Man by John Grisham.