What kinds of homes are in Groton, CT?

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

Groton, CT has 18,155 (±543) homes (2020–2024 American Community Survey).

That is about 584 homes per square mile of land.

47.6% are detached single-family houses.

15.1% are in buildings of two to four units.

23.8% are in buildings of five or more units.

Figures last updated on November 12, 2026.

Housing units: 18,155 (±543)
Detached houses: 47.6%
2–4 unit buildings: 15.1%
5+ unit buildings: 23.8%

Homes in Groton by building size

Housing units by units in structure, 2020–2024
Building type	Groton	Southeastern Connecticut Planning Region	Connecticut	United States
Single-family, detached	47.6% (±2.7 points)	61.1%	58.6%	61.3%
Single-family, attached (townhouse, rowhouse)	11.2% (±1.5 points)	5.7%	6.5%	6.2%
2 units	7.1% (±2.0 points)	7.6%	7.5%	3.4%
3 or 4 units	8.0% (±1.6 points)	7.2%	8.1%	4.3%
5 to 9 units	6.8% (±1.5 points)	5.8%	4.9%	4.5%
10 to 19 units	5.2% (±1.7 points)	3.6%	3.5%	4.3%
20 or more units	11.8% (±2.3 points)	6.7%	10.2%	10.3%
Mobile home	2.2% (±0.8 points)	2.3%	0.7%	5.6%
Boat, RV, van, etc.	0.0% (±0.2 points)	0.0%	0.0%	0.1%

In Groton, the share of homes in buildings of five or more units is higher than in Southeastern Connecticut Planning Region (16.1%).

It is also higher than in Connecticut (18.6%).

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

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

Nearest places with a published estimate, compared with Groton
Place	Distance	Homes in buildings of 5 or more units	Compared with this place
Groton	—	23.8% (±3.2 points)	—
New London	3.5 mi	34.2% (±4.2 points)	Higher
Mystic	4.0 mi	15.2% (±4.0 points)	Lower
Waterford (community)	5.1 mi	17.6% (±6.2 points)	Not measurably different
Ledyard	5.8 mi	3.9% (±2.5 points)	Lower
Gales Ferry	5.8 mi	0.0% (±14.2 points)	Lower
Waterford	6.0 mi	7.5% (±2.0 points)	Lower
Stonington	6.3 mi	8.2% (±1.5 points)	Lower
Oxoboxo River	8.3 mi	5.1% (±3.4 points)	Lower

Nearby places with a measurably lower figure: Mystic, CT (15.2%), Ledyard, CT (3.9%), Gales Ferry, CT (0.0%).

Nearby places with a measurably higher figure: New London, CT (34.2%).

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 Southeastern Connecticut Planning Region, place by place

Rank	Place	Homes in buildings of 5 or more units
1	New London	34.2% (±4.2 points)
2	Groton	23.8% (±3.2 points)
3	Norwich	23.3% (±2.6 points)
4	Windham	20.0% (±4.1 points)
5	Griswold	18.2% (±5.1 points)
6	Colchester	11.9% (±3.6 points)
7	East Lyme	11.8% (±2.4 points)
8	Sprague	8.9% (±8.0 points)

Showing 8 of 19 places in Southeastern Connecticut Planning Region, ranked from highest to lowest.

The figures for Groton include the places inside it that have pages of their own: Conning Towers-Nautilus Park, Long Hill (Southeastern Connecticut Planning Region), Noank, Old Mystic, Poquonock Bridge.

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 Groton

How many homes are in Groton?

Groton, CT has an estimated 18,155 (±543) housing units, occupied and vacant (2020–2024 American Community Survey).

Are most homes in Groton houses or apartments?

47.6% are detached houses and 11.2% attached houses, while 38.9% are in buildings of two or more units.

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

15.1% of homes in Groton 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 — Groton town, Southeastern Connecticut Planning Region, Connecticut

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 Groton town, Southeastern Connecticut Planning Region, Connecticut (county subdivision:34250, in state:09 county:180).

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.