Sugar Creek is a city in both Jackson and Clay Counties in Missouri in the United States. The population was 3,271 at the 2020 census. It is par…Sugar Creek is a city in both Jackson and Clay Counties in Missouri in the United States. The population was 3,271 at the 2020 census. It is part of the Kansas City metropolitan area. According to the United States Census Bureau, the city has a total area of 11.33 square miles, of which 10.54 square miles is land and 0.79 square miles is water.