Powhattan is a city in Brown County, Kansas, United States. As of the 2020 census, the population of the city was 69. Powhattan was found…Powhattan is a city in Brown County, Kansas, United States. As of the 2020 census, the population of the city was 69. Powhattan was founded circa 1877. The city was named for the father of Pocahontas, who resided in Jamestown, Virginia. It was originally a stagecoach station named Locknane.