Ada is a city in and the county seat of Pontotoc County, Oklahoma. The population was 16,008 at the 2000 census. Incorporated in 1901, the town grew rapidly with the arrival of the St. Louis and San Francisco Railway line. Ada was named for the daughter of a native Texan who helped found the town.
Ada is home to a world-class United States Environmental Protection Agency water laboratory. It is the headquarters of the Chickasaw Nation Indian tribe, and its corporation Chickasaw Enterprises is a major Ada-area employer. (Read more...)