Pavillion is a town in Fremont County, Wyoming, United States. The population was 231 at the 2010 census.
In 2010 the United States Environmental Protection Agency opened an investigation into the possible contamination of groundwater approximately five (5) miles east-northeast of Pavillion (not the Town of Pavillion's water supply).
Pavillion is located at 43°14′34″N 108°41′24″W (43.242885, -108.689996).
According to the United States Census Bureau, the town has a total area of 0.21 square miles (0.54 km2), all land.
As of the census of 2010, there were 231 people, 95 households, and 64 families residing in the town. The population density was 1,100.0 inhabitants per square mile (424.7/km2). There were 108 housing units at an average density of 514.3 per square mile (198.6/km2). The racial makeup of the town was 93.1% White, 3.0% Native American, 0.4% Asian, 0.4% from other races, and 3.0% from two or more races. Hispanic or Latino of any race were 5.6% of the population.
There were 95 households, of which 30.5% had children under the age of 18 living with them, 49.5% were married couples living together, 11.6% had a female householder with no husband present, 6.3% had a male householder with no wife present, and 32.6% were non-families. 29.5% of all households were made up of individuals, and 16.8% had someone living alone who was 65 years of age or older. The average household size was 2.43 and the average family size was 3.02.