Minonk is a city in Minonk Township, Woodford County, Illinois, United States. The population was 2,078 at the 2010 census, down from 2,168 in 2000. It is part of the Peoria, Illinois Metropolitan Statistical Area.
Minonk is located at 40°54′8″N 89°2′10″W / 40.90222°N 89.03611°W / 40.90222; -89.03611 (40.902357, -89.035992).
According to the 2010 census, Minonk has a total area of 2.42 square miles (6.27 km), all land.
At the 2000 census, there were 2,168 people, 841 households and 587 families residing in the city. The population density was 1,587.6 per square mile (611.0/km²). There were 885 housing units at an average density of 648.1 per square mile (249.4/km²). The racial makeup of the city was 98.99% White, 0.05% African American, 0.05% Asian, 0.28% from other races, and 0.65% from two or more races. Hispanic or Latino of any race were 1.20% of the population.
There were 841 households of which 31.9% had children under the age of 18 living with them, 57.9% were married couples living together, 9.2% had a female householder with no husband present, and 30.2% were non-families. 26.8% of all households were made up of individuals and 15.6% had someone living alone who was 65 years of age or older. The average household size was 2.50 and the average family size was 3.02.
25.9% of the population were under the age of 18, 6.9% from 18 to 24, 27.5% from 25 to 44, 19.0% from 45 to 64, and 20.8% who were 65 years of age or older. The median age was 39 years. For every 100 females, there were 91.4 males. For every 100 females age 18 and over, there were 86.0 males.
The median household income was $44,028 and the median family income was $50,379. Males had a median income of $35,859 compared with $22,500 for females. The per capita income for the city was $17,688. About 7.0% of families and 8.6% of the population were below the poverty line, including 12.9% of those under age 18 and 7.7% of those age 65 or over.