- Nowata is a city located in Nowata County, Oklahoma, United States. It serves as the county seat of Nowata County. The city has a population of around 3,700 people as of the 2010 census. Nowata is located in northeastern Oklahoma, near the Kansas border. It is known for its historical downtown area, which features several buildings dating back to the early 1900s. Additionally, the city is home to several parks, recreational areas, and a local school district.