Troy is a city in Madison County, Illinois, United States. The population was 10,960 at the 2020 census.
Troy is part of the St. Louis Metropolitan Statistical Area. Its namesake in Lincoln County, Missouri is also part of this MSA, making it (along with the two O'Fallons in Illinois and Missouri) one of the few pairs of like-named municipalities to be part of the same MSA.
History
Troy was platted in 1819. It was incorporated as a town on February 18, 1857, and as a city in 1892.
Geography
Troy is located at (38.729236, -89.891733).
According to the 2010 census, Troy has a total area of , of which (or 98.9%) is land and (or 1.1%) is water.
Demographics
At the 2000 census there were 8,524 people in 3,100 households, including 2,356 families, in the city. The population density was 2,037.6 people per square mile (787.4/km). There were 3,201 housing units at an average density of 765.2 per square mile (295.7/km). The racial makeup of the city was 95.48% White, 1.48% African American, 0.32% Native American, 0.70% Asian, 0.38% from other races, and 1.64% from two or more races. Hispanic or Latino of any race were 1.49%.
Of the 3,100 households 45.2% had children under the age of 18 living with them, 60.1% were married couples living together, 12.5% had a female householder with no husband present, and 24.0% were non-families. 19.5% of households were one person and 6.8% were one person aged 65 or older. The average household size was 2.75 and the average family size was 3.16.
The age distribution was 30.2% under the age of 18, 8.6% from 18 to 24, 34.3% from 25 to 44, 19.2% from 45 to 64, and 7.7% 65 or older. The median age was 33 years. For every 100 females, there were 96.0 males. For every 100 females age 18 and over, there were 91.5 males.
The median household income was $53,720 and the median family income was $59,643. Males had a median income of $41,705 versus $27,542 for females. The per capita income for the city was $21,174. About 2.1% of families and 3.4% of the population were below the poverty line, including 3.4% of those under age 18 and 4.5% of those age 65 or over.
Notable people
Paul Simon, US senator; lived in Troy and was the youngest editor of the town's newspaper (Troy Tribune)
Jesse L. Simpson, Chief Justice of the Illinois Supreme Court; born in Troy
Bob Turley, Cy Young Award-winning pitcher for the St. Louis Browns, Baltimore Orioles, New York Yankees, Los Angeles Angels, and Boston Red Sox; born in Troy
