Johns Creek is a city in Fulton County, Georgia, United States. According to the 2020 census, the population was 82,453. The city is a northea…Johns Creek is a city in Fulton County, Georgia, United States. According to the 2020 census, the population was 82,453. The city is a northeastern suburb of Atlanta. In the early 19th century, the Johns Creek area was dotted with trading posts along the Chattahoochee River in what was then Cherokee territory. The Cherokee Nation at the time was a confederacy of agrarian villages led by a chief. After European settlement, the Cherokee developed an alphabet, and a legislature and judiciary system patterned after the American model.