Jerseyville is a city in Jersey County, Illinois, United States. As of the 2010 U.S. census, the city had a total population of 8,465. It is the county seat of Jersey County, and is the largest city in the county.
Jerseyville is located at 39°7′15″N 90°19′39″W / 39.12083°N 90.32750°W / 39.12083; -90.32750 (39.120789, -90.327545).
According to the 2010 census, Jerseyville has a total area of 5.08 square miles (13.16 km), all land.
As of the census of 2000, there were 7,984 people, 3,260 households, and 2,089 families residing in the city. The population density was 1,817.9 people per square mile (702.2/km²). There were 3,423 housing units at an average density of 779.4 per square mile (301.1/km²). The racial makeup of the city was 98.85% White, 0.09% African American, 0.18% Native American, 0.16% Asian, 0.10% from other races, and 0.63% from two or more races. Hispanic or Latino of any race were 0.54% of the population.
There were 3,260 households, out of which 31.5% had children under the age of 18 living with them, 49.1% were married couples living together, 12.1% had a female householder with no husband present, and 35.9% were non-families. 32.1% of all households were made up of individuals, and 17.7% had someone living alone who was 65 years of age or older. The average household size was 2.35, and the average family size was 2.97.
In the city, the population was spread out with 24.4% under the age of 18, 8.1% from 18 to 24, 27.2% from 25 to 44, 19.9% from 45 to 64, and 20.4% who were 65 years of age or older. The median age was 38 years. For every 100 females, there were 84.6 males. For every 100 females age 18 and over, there were 80.5 males.
The median income for a household in the city was $35,556, and the median income for a family was $46,832. Males had a median income of $37,312 versus $21,282 for females. The per capita income for the city was $20,178. About 5.8% of families and 7.3% of the population were below the poverty line, including 8.5% of those under age 18 and 4.7% of those age 65 or over.
Jerseyville Illinois neighborhoods include: Central Rd, East Fairgrounds, Jerseyville