Monmouth, Warren County, Illinois
City in Warren County, Illinois · ZIP 61462
- Warren County
- Within Monmouth Township
- Census data · ACS 2019-2023
- 4 public schools
- 8,639 (2024 estimate)Population
- 3,317Households
- $59,690Median household income
- $88,100Median home value
- 4Public schools
- 1ZIP codes
About Monmouth
This page shows only what has been published about Monmouth: Census facts with their sources first, then its businesses, jobs, events, people in public roles, housing and questions as they are added. Nothing here is written by the town government.
Town intelligenceOfficial sources, refreshed yearly
| Census | Population |
|---|---|
| 2000 | 9,841 |
| 2010 | 9,444 |
| 2020 | 8,902 |
As counted at each census, within the boundaries the area had then; the current estimate is in the glance card.
Sources: Census 2000 Summary File 1: total population, place level, state 17, retrieved November 14, 2026; Census 2010 Summary File 1: total population, place level, state 17, retrieved November 14, 2026; Census 2020 Redistricting Data (P.L. 94-171): total population, place level, state 17, retrieved November 14, 2026.
Median household income $59,690 · Share of households by income, American Community Survey 5-year 2019-2023, table S1901.
Source: American Community Survey 5-year subject table S1901 (household income) 2019–2023, place level, state 17, retrieved November 14, 2026.
- Owner occupied
- 2,369 units
- Renter occupied
- 948 units
- Vacancy rate
- 12.8%
Occupied housing units by tenure and the share of all units vacant, American Community Survey 5-year 2019-2023, table DP04.
Source: American Community Survey 5-year data profile 2019–2023, place level, state 17, retrieved November 14, 2026.
| Measure | Monmouth | Warren County | Illinois |
|---|---|---|---|
| Population | 8,794 | 16,576 | 12,692,653 |
| Median household income | $59,690 | $64,650 | $81,702 |
| Median age | 35.0 | 38.7 | 38.9 |
| Median home value | $88,100 | $101,300 | $250,500 |
| Bachelor’s degree or higher | 18.7% | 22.0% | 37.2% |
| Foreign-born residents | 10.6% | 6.2% | 14.4% |
| Owner-occupied homes | 71.4% | 78.1% | 66.8% |
| Mean commute to work | 16.1 minutes | 19.4 minutes | 28.1 minutes |
Source: American Community Survey 5-year data profile 2019–2023, place level, state 17, retrieved November 14, 2026.
CommunityRules and moderation
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Events in MonmouthAll events
No upcoming event is listed in Monmouth yet. Members and businesses add events from the Events page; each is screened before it shows.
Schools
| School | Type | Grades | District |
|---|---|---|---|
| Harding Primary School | Public | 2–3 | Monmouth-Roseville CUSD 238 |
| Lincoln Early Childhood School | Public | Pre-K–1 | Monmouth-Roseville CUSD 238 |
| Central Intermediate School | Public | 4–6 | Monmouth-Roseville CUSD 238 |
| Monmouth-Roseville High Sch | Public | 9–12 | Monmouth-Roseville CUSD 238 |
Open public schools in the NCES directory for 2023–2024, placed by their listed location; private schools are not in the source. Enrollment and ratings are not shown.
Sources: NCES Common Core of Data, public school directory 2023–2024, retrieved November 14, 2026; NCES EDGE public school geocodes 2024–2025, retrieved November 14, 2026.
Legislative districts
| Chamber | District |
|---|---|
| U.S. House of Representatives | Congressional District 17 (IL-17) |
| State legislature, lower chamber | State House District 71 |
| State legislature, upper chamber | State Senate District 36 |
Boundaries from the Census Bureau’s TIGER/Line district files, matched to Monmouth’s own boundary. Who holds each seat appears on the People page once the official records are approved.
Sources: Census cartographic boundaries 2025: congressional districts, 119th Congress, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, upper chamber, state 17, retrieved November 14, 2026; Census cartographic boundaries 2025: state legislative districts, lower chamber, state 17, retrieved November 14, 2026.
Frequently asked about MonmouthPromoted from questions people asked
No question about Monmouth has been asked often enough to publish an answer yet. Ask Monmouth and the answer, once a person checks it, appears here.
Nearby towns
- Monmouth TownshipTownship
- Lenox TownshipTownship
- Hale TownshipTownship
- Tompkins TownshipTownship
- KirkwoodVillage
- CameronCensus designated place
- Spring Grove TownshipTownship
- Coldbrook TownshipTownship
- Little YorkVillage
- Sumner TownshipTownship
Other towns in Warren County
- AlexisVillage
- Berwick TownshipTownship
- CameronCensus designated place
- Coldbrook TownshipTownship
- Ellison TownshipTownship
- Floyd TownshipTownship
- Greenbush TownshipTownship
- Hale TownshipTownship
- Kelly TownshipTownship
- KirkwoodVillage
Other places named Monmouth in Illinois
- Monmouth TownshipTownship