Mechanicsville is a city in Cedar County, Iowa, United States. The population was 1,020 at the time of the 2020 census. Mechanicsville …Mechanicsville is a city in Cedar County, Iowa, United States. The population was 1,020 at the time of the 2020 census. Mechanicsville was platted in 1855 by Daniel A. Comstock. It was so named from the fact several of its first settlers were mechanics. A fire in 1883 destroyed the south side of the business district.