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Monmouth
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About Monmouth
Monmouth is located in Warren county Illinois with a geographic area of 4.2 square miles. The total population in Monmouth is 8,837 with 47.5% male and 52.5% female. Children under age 5 represent 5.0% of the population, under age 18 equal 22.1% of the population and over age 65 is 17.0% of the population. The median household income is $50,740, per capita income is $23,687. There are a total of 3,408 housing units with 66.8% owner occupied. Education includes 31.1% of residents that are high school graduates and 21.8% with a bachelor's degree or higher. The average temperature in Monmouth in the summer is 73 degrees, and in the winter 27 degrees.