Jenks is a city in Tulsa County, Oklahoma, United States, and a suburb of Tulsa, in the northeastern part of the state. It is situated between the Arkansas River and U.S. Route 75. Jenks is one of the fastest growing cities in Oklahoma. As of the 2000 census, the city population was 9,557, but by 2010, the population was 16,924, an increase of 77.1 percent.