What is the rental vacancy rate in O'Fallon, IL?

Name: Vacancy rate in O'Fallon, IL, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

The rental vacancy rate in O'Fallon, IL is 3.5% (±2.4 points) (2020–2024 American Community Survey).

The homeowner vacancy rate is 1.8% (±1.5 points).

714 (±302) homes, 5.3% of all housing units, were vacant, a count that includes seasonal homes and homes being sold or rented.

In O'Fallon, the rental vacancy rate went from 3.1% in 2015–2019 to 3.5% in 2020–2024 (+0.4 percentage points), not a measurable change.

Figures last updated on November 12, 2026.

Rental vacancy rate: 3.5% (±2.4 points)
Homeowner vacancy rate: 1.8% (±1.5 points)
Vacant homes: 714 (±302)

Vacancy in O'Fallon against St. Clair County, its state and the nation

Estimate (90% margin of error)
	O'Fallon	St. Clair County	Illinois	United States
Rental vacancy rate	3.5% (±2.4 points)	4.7% (±1.2 points)	5.0% (±0.2 points)	5.5%
Homeowner vacancy rate	1.8% (±1.5 points)	1.1% (±0.4 points)	1.0% (±0.1 points)	0.9%
Vacant housing units	714 (±302)	14,784 (±1,032)	421,003 (±7,877)	14,547,859

The rental vacancy rate is the share of rental homes that are vacant and for rent; it leaves out homes already rented but not yet moved into, and seasonal homes.

In O'Fallon, the rental vacancy rate is not measurably different from St. Clair County (4.7%).

It is not measurably different from Illinois (5.0%).

It is not measurably different from the national figure (5.5%).

Rental vacancy rate in places near O'Fallon

Nearest places with a published estimate, compared with O'Fallon
Place	Distance	Rental vacancy rate	Compared with this place
O'Fallon	—	3.5% (±2.4 points)	—
O'Fallon Township	2.9 mi	5.0% (±3.4 points)	Not measurably different
Shiloh	3.5 mi	0.0% (±1.7 points)	Lower
Caseyville Township	3.6 mi	8.7% (±4.5 points)	Higher
Fairview Heights	4.8 mi	12.7% (±6.7 points)	Higher
Swansea	5.1 mi	9.9% (±7.8 points)	Not measurably different
Scott AFB	5.2 mi	0.0% (±2.9 points)	Not measurably different
Shiloh Valley Township	5.4 mi	0.0% (±1.6 points)	Lower
Lebanon	5.7 mi	4.3% (±5.6 points)	Not measurably different

Nearby places with a measurably lower figure: Shiloh, IL (0.0%), Shiloh Valley Township, IL (0.0%).

Nearby places with a measurably higher figure: Caseyville Township, IL (8.7%), Fairview Heights, IL (12.7%).

Distance is measured in a straight line between the Census Bureau’s internal points for each place.

Rental vacancy rate across St. Clair County, place by place

Rank	Place	Rental vacancy rate
8 (tie)	East St. Louis Township	5.2% (±2.9 points)
10	O'Fallon Township	5.0% (±3.4 points)
11	Lebanon	4.3% (±5.6 points)
12 (tie)	Brooklyn	3.8% (±6.4 points)
12 (tie)	Lebanon Township	3.8% (±6.3 points)
12 (tie)	Stites Township	3.8% (±6.4 points)
15	O'Fallon	3.5% (±2.4 points)
16	Centreville Township	3.1% (±2.6 points)
17	St. Clair Township	2.7% (±2.8 points)
18	Mascoutah	2.5% (±5.3 points)
19	Mascoutah Township	2.4% (±5.1 points)
20 (tie)	Caseyville	0.0% (±7.8 points)
20 (tie)	Dupo	0.0% (±6.6 points)

Showing 13 of 45 places in St. Clair County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates), compared with 2015–2019.

Margins of error are at the 90% confidence level.

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Questions about O'Fallon

Is it hard to find a rental in O'Fallon?

The rental vacancy rate in O'Fallon, IL is 3.5% (±2.4 points); a low rate means few rental homes stand empty and for rent at any time, which usually means more competition for each one.

Is the rental market in O'Fallon tighter than it was?

In O'Fallon, the rental vacancy rate went from 3.1% in 2015–2019 to 3.5% in 2020–2024 (+0.4 percentage points), not a measurable change.

How many homes are vacant in O'Fallon?

An estimated 714 (±302) housing units, 5.3% of the total, including seasonal homes and homes waiting to be sold or rented.

Sources

To check these figures in the Census Bureau’s own API, request the variables below from the 2024 ACS 5-year data profile (acs/acs5/profile) for O'Fallon city, Illinois (place:55249, in state:17).

Each estimate (E or PE) has a margin of error beside it (M or PM).

The 2015–2019 figures are DP04_0005E, DP04_0005M from the 2019 release.

The API needs a free key.

Request a Census API key.

DP04_0005E, DP04_0005M, DP04_0004E, DP04_0004M, DP04_0003E, DP04_0003M, DP04_0003PE, DP04_0003PM

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.

Figures are published by the US Census Bureau, HUD, the Bureau of Labor Statistics and the FBI; Seayora reproduces them and does not adjust them, except where a sentence says it compares dollar figures after inflation. They describe the whole place, not any one building or street, and are not an appraisal, a rent determination, a tax bill, a safety rating or legal advice.