Commercial Real Estate Market in Monmouth, IL
Updated monthly: sale, lease, property records, location trend, and more… · Last update: August 31
24 active listings and 569 off-market properties in Monmouth, IL.
Market Trends
Monmouth, IL spans 142.2 square miles in Warren County, Illinois. Figures below refresh monthly; last updated 31 August 2026.
Office
Office vacancy in Monmouth, IL runs 21.3% across the Midwest region in 2025, up from 13.7% in 2019.
Vacancy Rate % in Midwest region
Retail
Retail vacancy in Monmouth, IL runs 6.3% across the Midwest region in 2025, down from 8% in 2020.
Vacancy Rate % in Midwest region
Industrial
Industrial vacancy in Monmouth, IL runs 4.9% across the Midwest region in 2025, up from 4.4% in 2019. Nearly 1.6x the 2022 low of 3.1%.
Vacancy Rate % in Midwest region
Multifamily
Multifamily vacancy in Monmouth, IL runs 8% across the Midwest region in 2025, up from 6.5% in 2022.
Vacancy Rate % in Midwest region
Zoning & Land Use
Land Use Mix share of zoned land by category
- Residential 44.9%
- Commercial 11.3%
- Industrial 10.6%
Largest Zones share of zoned land by district
Public And Semi Public Service
Medium Density Residential
Low Density Residential
Limited Manufacturing
Highway Commercial
Market overview
Demographics & Economy
Monmouth, IL has 10,980 residents in 4,800 households. Density runs 77 people per square mile. Median household income here is $62,190 and median gross rent $657 a month.
10,980
Population
4,800
Households
2.3
Avg Household Size
38
Median Age
21%
College-Educated
83%
High-School Grad
142.2 sq mi
ZIP Area
77
Density / Sq Mi
$62,190
Median Household Income
$33,346
Median Earnings
$657
Median Rent
$100,900
Median Home Value
Tools
Nearby Markets
| Market | Average Sale Price, $/SF | Average Lease Price, $/SF/Yr |
|---|---|---|
| Ormonde | — | — |
| Eleanor | — | — |
| Gerlaw | — | — |
| Kirkwood | — | — |
Commercial property in Monmouth, IL asks $29/SF.
Frequently Asked Questions
What is the average price per square foot for commercial property in Monmouth?
Commercial property in Monmouth, IL asks an average of $29 per square foot.
Where does Realmo's Monmouth market data come from?
Realmo compiles Monmouth, IL figures from 5 recent recorded sales, 22 active sale listings, 2 active lease listings, 569 tracked off-market properties, the current Monmouth zoning release. Sale and lease figures refresh monthly; vacancy annually. Last updated 31 August 2026.
Methodology & data sources
- Asking prices and averages
- Computed from 22 active for-sale and 2 active for-lease listings in Monmouth, IL. These are ASKING figures from live listings, not closed-transaction prices, and a segment carried by a handful of listings reads as indicative rather than an average.
- Vacancy rates
- Published per-sector market series, taken at the metro level where one exists and otherwise at the Census-region level — a chart reading "in <region> region" is a regional number, not this city's.
- Zoning and land use
- The current municipal zoning release: 2,413 zoned acres across 11 districts. Shares are of zoned land, so parcels the release leaves unclassified are excluded from the mix.
- Refresh
- The monthly aggregates close at the end of the previous month, so 31 August 2026 — not today — is the honest last update.
- Known limitations
- office vacancy is reported at Midwest region level, retail vacancy is reported at Midwest region level and industrial vacancy is reported at Midwest region level.
- Coverage
- Metrics below the 10-observation threshold fall back one geographic level. The geography used is named on each figure.
Compiled by the Realmo Data team · reviewed 31 August 2026 · report a data issue
