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Data on this report is based on areas within the legal city boundary, outlined in black on the map. Any additional neighborhoods shown on the map are associated with the city by name and are included for reference only.

Monmouth, IL
Real Estate & Demographic Data






Monmouth profile


Living in Monmouth



Monmouth is a somewhat small city located in the state of Illinois. With a population of 8,650 people and two associated neighborhoods, Monmouth is the 242nd largest community in Illinois. Monmouth has a large stock of pre-World War II architecture, making it one of the older and more historic cities in the country.

Because there are quite a few people attending college in Monmouth, it is thought of as a college town. To the benefit of the many students in the area, Monmouth provides a number of services, amenities and opportunities geared towards their needs and activities.

Residents of the city have the good fortune of having one of the shortest daily commutes compared to the rest of the country. On average, they spend only 14.79 minutes getting to work every day.

The education level of Monmouth citizens, measured as those with bachelor's degrees or advanced degrees, is similar to the national average for all American cities and towns. 19.47% of adults 25 and older in Monmouth have a college degree.

The per capita income in Monmouth in 2022 was $27,553, which is lower middle income relative to Illinois and the nation. This equates to an annual income of $110,212 for a family of four. However, Monmouth contains both very wealthy and poor people as well.

Monmouth is a very ethnically-diverse city. The people who call Monmouth home describe themselves as belonging to a variety of racial and ethnic groups. The greatest number of Monmouth residents report their race to be White, followed by Black or African-American. Monmouth also has a sizeable Hispanic population (people of Hispanic origin can be of any race). People of Hispanic or Latino origin account for 18.18% of the city’s residents. Important ancestries of people in Monmouth include German, Irish, English, French, and Swedish.

The most common language spoken in Monmouth is English. Other important languages spoken here include Spanish and French.


Real Estate in Popular Monmouth Neighborhoods

Zip Codes in Monmouth, IL