Farmington is a city in Fulton County, Illinois, United States. It is north of Canton, west of Peoria, southeast of Galesburg, and northeast of Macomb. The population was 2,448 at the 2010 census, down from 2,601 at the 2000 census. The public school system is Farmington Central Community Unit School District 265, which includes Farmington Central High School. Because it is in Fulton County, it is a part of the Canton Micropolitan Area and the wider Peoria Consolidated Statistical Area.
Farmington is located in the northeast corner of Fulton County at 40°41′56″N 90°0′13″W / 40.69889°N 90.00361°W / 40.69889; -90.00361 (40.698855, -90.003673). Illinois Routes 78 and 116 pass through the center of the city. IL 116 enters from the north as North Main Street, and IL 78 enters from the south as South Main Street. The two highways leave the city to the east on East Fort Street. IL 78 leads north 42 miles (68 km) to Kewanee and south 10 miles (16 km) to Canton, the largest city in Fulton County, while IL 116 leads east 22 miles (35 km) to Peoria and west 22 miles to St. Augustine.
According to the 2010 census, Farmington has a total area of 1.45 square miles (3.76 km), all land.
As of the census of 2000, there were 2,601 people, 1,035 households, and 710 families residing in the city. The population density was 2,095.1 people per square mile (809.9/km²). There were 1,114 housing units at an average density of 897.3 per square mile (346.9/km²). The racial makeup of the city was 98.62% White, 0.12% African American, 0.35% Native American, 0.15% Asian, 0.19% from other races, and 0.58% from two or more races. Hispanic or Latino of any race were 0.96% of the population.
There were 1,035 households out of which 29.7% had children under the age of 18 living with them, 57.2% were married couples living together, 7.9% had a female householder with no husband present, and 31.4% were non-families. 29.2% of all households were made up of individuals and 16.4% 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 2.97.
In the city the population was spread out with 23.0% under the age of 18, 8.5% from 18 to 24, 26.1% from 25 to 44, 20.5% from 45 to 64, and 21.8% who were 65 years of age or older. The median age was 40 years. For every 100 females, there were 88.6 males. For every 100 females age 18 and over, there were 86.6 males.
The median income for a household in the city was $35,893, and the median income for a family was $49,167. Males had a median income of $34,500 versus $25,590 for females. The per capita income for the city was $19,336. About 4.2% of families and 7.0% of the population were below the poverty line, including 6.3% of those under age 18 and 6.4% of those age 65 or over.