Parsons is a city in Decatur County, Tennessee, United States. The population was 2,373 at the 2010 census. Parsons is the largest city …Parsons is a city in Decatur County, Tennessee, United States. The population was 2,373 at the 2010 census. Parsons is the largest city by population in Decatur County. Created around 1889 by the Tennessee Midland Railroad Company, the city of Parsons was founded by Henry Myracle as he deeded 1431⁄3 acres to the TMRC to start a town on his land. The railroad established Parsons Improvement Co. and Myracle maintained the town. The rail depot was located where the present day BP One Stop is located. A commercial lot, which was used as a tie yard was at present location of CB&S Bank. A storage lot and livestock pens were located where Townsend Chevrolet is presently located. There was a large water tank beside the depot and two packing houses nearby for farmers' produce. There was also a town pump and a small park near the water tank.