A post office called Troy Grove has been in operation since 1837. The community took its name from a nearby grove, which was named for an early settler.
Geography
Troy Grove is located in northwestern LaSalle County at . U.S. Route 52 passes through the north side of the village as North 37th Road; it leads northwest to Mendota and east to Joliet. Interstate 39 passes east of the village, with access from Exit 66. I-39 leads north to Rockford and south to Interstate 80 at LaSalle. Troy Grove was formerly known as Homer. According to the 2010 census, Troy Grove has a total area of, all recorded as land. The Little Vermilion River, a south-flowing tributary of the Illinois River, passes through the southeast corner of the village.
Demographics
As of the census of 2000, there were 305 people, 103 households, and 77 families residing in the village. The population density was 444.2 people per square mile. There were 108 housing units at an average density of 157.3 per square mile. The racial makeup of the village was 95.41% White, 1.97% Asian, 0.33% Pacific Islander, 1.31% from other races, and 0.98% from two or more races. Hispanic or Latino of any race were 5.57% of the population. There were 103 households out of which 44.7% had children under the age of 18 living with them, 60.2% were married couplesliving together, 8.7% had a female householder with no husband present, and 24.3% were non-families. 17.5% of all households were made up of individuals and 4.9% had someone living alone who was 65 years of age or older. The average household size was 2.96 and the average family size was 3.45. In the village, the population was spread out with 33.1% under the age of 18, 10.5% from 18 to 24, 27.2% from 25 to 44, 20.3% from 45 to 64, and 8.9% who were 65 years of age or older. The median age was 33 years. For every 100 females, there were 86.0 males. For every 100 females age 18 and over, there were 92.5 males. The median income for a household in the village was $55,682, and the median income for a family was $56,591. Males had a median income of $40,417 versus $23,250 for females. The per capita income for the village was $16,595. About 6.6% of families and 4.5% of the population were below the poverty line, including 5.8% of those under the age of eighteen and none of those sixty five or over.
