Johnstown is a census-designated place (CDP) in Fremont County, Wyoming, United States. The population was 242 at the 2010 census.
Geography
Johnstown is located at (43.128719, -108.690339).
According to the United States Census Bureau, the CDP has a total area of 32.1 square miles (83.2 km<sup>2</sup>), of which 31.5 square miles (81.5 km<sup>2</sup>) is land and 0.7 square mile (1.8 km<sup>2</sup>) (2.12%) is water.
Demographics
As of the census