Joy is a village in Mercer County, Illinois. The population was 417 in the 2010 census.
The origin of the name: "Joy" was named when founded in 1869 after the president of the CB&Q Railroad, J.F. Joy.
Joy is located at 41°11′49″N 90°52′47″W (41.196923, -90.879702).
According to the 2010 census, Joy has a total area of 0.43 square miles (1.11 km2), all land.
At the 2000 census, there were 373 people, 156 households and 104 families residing in the village. The population density was 888.3 per square mile (342.9/km2). There were 167 housing units at an average density of 397.7 per square mile (153.5/km2). The racial makeup of the village was 99.46% White, and 0.54% from two or more races. Hispanic or Latino of any race were 1.07% of the population.
There were 156 households, of which 32.1% had children under the age of 18 living with them, 54.5% were married couples living together, 9.6% had a female householder with no husband present, and 33.3% were non-families. 29.5% of all households were made up of individuals, and 13.5% had someone living alone who was 65 years of age or older. The average household size was 2.39 and the average family size was 2.96.