How many bedrooms do homes in O'Fallon, MO have?

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

In O'Fallon, MO, 5.4% of homes are studios or one-bedrooms and 77.9% have three or more bedrooms (2020–2024 American Community Survey).

The most common size is 3 bedrooms, 43.8% of homes.

Figures last updated on November 12, 2026.

Studio or 1 bedroom: 5.4%
3 or more bedrooms: 77.9% (±3.0 points)
Most common: 3 bedrooms

Homes in O'Fallon by bedroom count

Housing units by bedrooms, 2020–2024
Bedrooms	O'Fallon	St. Charles County	Missouri	United States
No bedroom (studio)	1.5% (±0.8 points)	1.3%	2.0%	2.9%
1 bedroom	3.9% (±1.0 points)	5.6%	9.7%	10.9%
2 bedrooms	16.6% (±1.5 points)	17.5%	26.1%	25.0%
3 bedrooms	43.8% (±2.0 points)	43.4%	41.3%	38.7%
4 bedrooms	27.8% (±1.9 points)	26.6%	16.3%	17.5%
5 or more bedrooms	6.3% (±1.2 points)	5.6%	4.6%	4.9%

In O'Fallon, the share of homes with three or more bedrooms is not measurably different from St. Charles County (75.6%).

It is also higher than in Missouri (62.2%).

It is higher than the national figure (61.1%).

Homes with 3 or more bedrooms in places near O'Fallon

Nearest places with a published estimate, compared with O'Fallon
Place	Distance	Homes with 3 or more bedrooms	Compared with this place
O'Fallon	—	77.9% (±3.0 points)	—
Dardenne Prairie	3.0 mi	89.3% (±8.0 points)	Higher
Lake St. Louis	3.5 mi	66.3% (±6.3 points)	Lower
Cottleville	4.1 mi	79.6% (±10.0 points)	Not measurably different
St. Paul	4.6 mi	92.8% (±15.0 points)	Not measurably different
Josephville	4.8 mi	75.7% (±23.4 points)	Not measurably different
Weldon Spring Heights	5.9 mi	99.9% (±30.8 points)	Not measurably different
St. Peters	6.2 mi	69.2% (±3.4 points)	Lower
Weldon Spring	6.4 mi	76.3% (±12.2 points)	Not measurably different

Nearby places with a measurably lower figure: Lake St. Louis, MO (66.3%), St. Peters, MO (69.2%).

Nearby places with a measurably higher figure: Dardenne Prairie, MO (89.3%).

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

Homes with 3 or more bedrooms across St. Charles County, place by place

Rank	Place	Homes with 3 or more bedrooms
2	St. Paul	92.8% (±15.0 points)
3	Dardenne Prairie	89.3% (±8.0 points)
4	Foristell	88.1% (±28.7 points)
5	Wentzville	81.7% (±4.9 points)
6	Cottleville	79.6% (±10.0 points)
7	New Melle	79.3% (±15.8 points)
8	O'Fallon	77.9% (±3.0 points)
9	Weldon Spring	76.3% (±12.2 points)
10	Josephville	75.7% (±23.4 points)
11 (tie)	Portage Des Sioux	69.2% (±26.0 points)
11 (tie)	St. Peters	69.2% (±3.4 points)
13	Flint Hill	67.7% (±17.9 points)
14	Lake St. Louis	66.3% (±6.3 points)

Showing 13 of 17 places in St. Charles County, ranked from highest to lowest.

Survey years: 2020–2024 (American Community Survey 5-year estimates).

Margins of error are at the 90% confidence level.

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Questions about O'Fallon

What is the most common home size in O'Fallon?

The most common size is 3 bedrooms, 43.8% of homes in O'Fallon, MO.

How many studios and one-bedroom homes are in O'Fallon?

5.4% of homes in O'Fallon have one bedroom or none.

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — O'Fallon city, Missouri

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, Missouri (place:54074, in state:29).

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

The API needs a free key.

Request a Census API key.

DP04_0039PE, DP04_0039PM, DP04_0040PE, DP04_0040PM, DP04_0041PE, DP04_0041PM, DP04_0042PE, DP04_0042PM, DP04_0043PE, DP04_0043PM, DP04_0044PE, DP04_0044PM

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.