Douglas is a city in Converse County, Wyoming, United States. The population was 6,120 at the 2010 census. It is the county seat of Converse County and the home of the Wyoming State Fair.
Its former railroad passenger depot is listed on the National Register of Historic Places.
Douglas was platted in 1886 when the Wyoming Central Railway (later the Chicago and North Western Transportation Company) established a railway station; the settlement had been in existence since 1867 when Fort Fetterman was built and was first known as "Tent City" before it was officially named "Douglas", after Senator Stephen A. Douglas. It served as a supply point, warehousing and retail, for surrounding cattle ranches, as well as servicing railway crews, cowboys and the troops of the U.S. Army stationed at Fort Fetterman.
Douglas was the home of a World War II internment camp.
Douglas is located at 42°45′22″N 105°23′4″W (42.756008, -105.384555).
According to the United States Census Bureau, the city has a total area of 4.76 square miles (12.33 km2), of which 4.58 square miles (11.86 km2) is land and 0.18 square miles (0.47 km2) is water.
Douglas has a semi-arid climate (Köppen climate classification BSk).
As of the census of 2010, there were 6,120 people, 2,546 households, and 1,613 families residing in the city. The population density was 1,336.2 inhabitants per square mile (515.9/km2).