Monmouth is a somewhat small city located in the state of Illinois. With a population of 8,639 people and two associated neighborhoods, Monmouth is the 242nd largest community in Illinois.

Telecommuters are a relatively large percentage of the workforce: 7.51% of people work from home. While this number may seem small overall, as a fraction of the total workforce it is high relative to the nation. These workers are often telecommuters who work in knowledge-based, white-collar professions. For example, Silicon Valley has large numbers of people who telecommute. Other at-home workers may be self-employed people who operate small businesses out of their homes.

Monmouth is also a college town, where lots of students live while attending area colleges. Because of the high percentage of people living in Monmouth enrolled in college, Monmouth has a number of services, amenities and opportunities geared towards the needs and activities of students.

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 15.87 minutes getting to work every day.

The percentage of adults in Monmouth who are college-educated is close to the national average for all communities of 21.84%: 18.28% of the adults in Monmouth have a bachelor's degree or advanced degree.

The per capita income in Monmouth in 2022 was $29,501, which is lower middle income relative to Illinois and the nation. This equates to an annual income of $118,004 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 18.05% of the city’s residents. Important ancestries of people in Monmouth include German, Irish, English, Italian, and Scottish.

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