Roanoke is a village in Roanoke Township, Woodford County, Illinois, United States. The population was 2,065 at the 2010 census, up from 1,994 at the 2000 census. It is part of the Peoria, Illinois Metropolitan Statistical Area.
Roanoke is located at 40°47′51″N 89°11′59″W / 40.79750°N 89.19972°W / 40.79750; -89.19972 (40.797421, -89.199784).
According to the 2010 census, Roanoke has a total area of 0.957 square miles (2.48 km), of which 0.92 square miles (2.38 km) (or 96.13%) is land and 0.037 square miles (0.10 km) (or 3.87%) is water.
As of the census of 2000, there were 1,994 people, 765 households, and 559 families residing in the village. The population density was 2,192.0 people per square mile (846.0/km²). There were 809 housing units at an average density of 889.3 per square mile (343.2/km²). The racial makeup of the village was 99.15% White, 0.10% African American, 0.10% Native American, 0.05% Asian, 0.10% from other races, and 0.50% from two or more races. Hispanic or Latino of any race were 0.15% of the population.
There were 765 households out of which 31.5% had children under the age of 18 living with them, 64.6% were married couples living together, 6.4% had a female householder with no husband present, and 26.8% were non-families. 25.0% of all households were made up of individuals and 14.8% had someone living alone who was 65 years of age or older. The average household size was 2.52 and the average family size was 3.00.
In the village, the population was spread out with 24.3% under the age of 18, 7.6% from 18 to 24, 24.8% from 25 to 44, 21.4% from 45 to 64, and 21.9% who were 65 years of age or older. The median age was 40 years. For every 100 females there were 96.1 males. For every 100 females age 18 and over, there were 91.5 males.
The median income for a household in the village was $43,125, and the median income for a family was $54,750. Males had a median income of $38,375 versus $22,614 for females. The per capita income for the village was $24,489. About 2.9% of families and 4.9% of the population were below the poverty line, including 6.3% of those under age 18 and 2.5% of those age 65 or over.