Owasso is a city in Rogers and Tulsa Counties in the U.S. state of Oklahoma, and the largest northern suburb of Tulsa. The population was 39,328 persons as of the 2022 census estimate, compared to 28,915 at the 2010 census, a gain of 36 percent. Originally settled in 1881 in Indian Territory, the town was incorporated in 1904 just prior to Oklahoma statehood and was chartered as a city in 1972.