What kinds of homes are in Swansea, IL?

Name: Types of homes in Swansea, IL, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Swansea, IL has 6,175 (±402) homes (2020–2024 American Community Survey).

That is about 952 homes per square mile of land.

69.7% are detached single-family houses.

4.0% are in buildings of two to four units.

12.1% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 6,175 (±402)
Detached houses: 69.7%
2–4 unit buildings: 4.0%
5+ unit buildings: 12.1%

Homes in Swansea by building size

Housing units by units in structure, 2020–2024
Building type	Swansea	St. Clair County	Illinois	United States
Single-family, detached	69.7% (±4.0 points)	72.1%	58.2%	61.3%
Single-family, attached (townhouse, rowhouse)	4.8% (±2.1 points)	5.2%	6.1%	6.2%
2 units	1.9% (±1.2 points)	3.3%	5.2%	3.4%
3 or 4 units	2.1% (±1.2 points)	4.4%	6.4%	4.3%
5 to 9 units	2.2% (±1.9 points)	5.3%	6.3%	4.5%
10 to 19 units	4.2% (±2.2 points)	2.3%	4.0%	4.3%
20 or more units	5.7% (±3.1 points)	2.9%	11.5%	10.3%
Mobile home	9.4% (±3.0 points)	4.4%	2.3%	5.6%
Boat, RV, van, etc.	0.0% (±0.6 points)	0.0%	0.0%	0.1%

In Swansea, the share of homes in buildings of five or more units is not measurably different from St. Clair County (10.5%).

It is also lower than in Illinois (21.8%).

It is lower than the national figure (19.1%).

Homes in buildings of 5 or more units in places near Swansea

Nearest places with a published estimate, compared with Swansea
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Swansea	—	12.1% (±4.2 points)	—
St. Clair Township	1.3 mi	11.7% (±2.6 points)	Not measurably different
Belleville	2.5 mi	13.5% (±2.5 points)	Not measurably different
Fairview Heights	3.2 mi	13.1% (±3.8 points)	Not measurably different
Shiloh	4.0 mi	16.3% (±5.1 points)	Not measurably different
Caseyville Township	4.8 mi	15.8% (±3.2 points)	Not measurably different
O'Fallon	5.1 mi	16.3% (±3.6 points)	Not measurably different
Caseyville	5.9 mi	9.2% (±5.7 points)	Not measurably different
Stookey Township	6.0 mi	5.9% (±3.2 points)	Lower

Nearby places with a measurably lower figure: Stookey Township, IL (5.9%).

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

Homes in buildings of 5 or more units across St. Clair County, place by place

Rank	Place	Homes in buildings of 5 or more units
7 (tie)	East St. Louis	14.9% (±2.8 points)
7 (tie)	East St. Louis Township	14.9% (±2.8 points)
9	Belleville	13.5% (±2.5 points)
10	Lebanon Township	13.2% (±6.7 points)
11	Fairview Heights	13.1% (±3.8 points)
12	O'Fallon Township	12.5% (±3.2 points)
13	Swansea	12.1% (±4.2 points)
14	St. Clair Township	11.7% (±2.6 points)
15	Dupo	10.4% (±6.7 points)
16	Mascoutah	9.7% (±3.9 points)
17	Caseyville	9.2% (±5.7 points)
18	Mascoutah Township	9.0% (±3.7 points)
19	St. Libory	8.3% (±18.8 points)

Showing 13 of 46 places in St. Clair 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.

What you can do on Seayora in Swansea

One account for renting, owning, managing and fixing homes, with these figures beside you.

Own or manage a rental?

List it, sign the lease and collect rent online, with the figures for Swansea beside you.

Create a landlord account · See what landlords get

Looking for a place to rent?

Browse homes for rent near Swansea, save the ones you like and apply online.

Browse rentals · Create a renter account

Do repairs, renovations or maintenance?

Get found by owners and renters near Swansea, and send estimates and invoices from your phone.

Join as a pro · Find a pro

Questions about Swansea

How many homes are in Swansea?

Swansea, IL has an estimated 6,175 (±402) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Swansea houses or apartments?

69.7% are detached houses and 4.8% attached houses, while 16.1% are in buildings of two or more units.

How many two-family and small multifamily homes are in Swansea?

4.0% of homes in Swansea are in buildings of two to four units, the small rental buildings that are often owner-occupied.

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Swansea village, Illinois

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 Swansea village, Illinois (place:74119, in state:17).

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_0001E, DP04_0001M, DP04_0007PE, DP04_0007PM, DP04_0008PE, DP04_0008PM, DP04_0009PE, DP04_0009PM, DP04_0010PE, DP04_0010PM, DP04_0011PE, DP04_0011PM, DP04_0012PE, DP04_0012PM, DP04_0013PE, DP04_0013PM, DP04_0014PE, DP04_0014PM, DP04_0015PE, DP04_0015PM

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.