Marquette Heights is a city in Tazewell County, Illinois, United States. The population was 2,824 at the 2010 census. Marquette Heights is a suburb of Peoria and is part of the Peoria, Illinois Metropolitan Statistical Area. Marquette Heights is located at 40°37′02″N 89°36′14″W.According to the 2010 census, Marquette Heights has a total area of 0.99 square miles (2.56 km2), all land.As of the census of 2000, there were 2,794 people, 982 households, and 815 families residing in the city. The population density was 1,702.7 people per square mile (657.8/km2). There were 1,006 housing units at an average density of 613.1 per square mile (236.8/km2).
The racial makeup of the city was 98.21% White, 0.39% African American, 0.07% Native American, 0.25% Asian, 0.39% from other races, and 0.68% from two or more races. Hispanic or Latino of any race were 1.32% of the population. There were 982 households, out of which 38.9% had children under the age of 18 living with them, 68.1% were married couples living together, 9.8% had a female householder with no husband present, and 17.0% were non-families. 14.1% of all households were made up of individuals, and 4.4% had someone living alone who was 65 years of age or older. The average household size was 2.85 and the average family size was 3.08.
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