How are homes heated in Old Greenwich, CT?

Name: Heating fuel in Old Greenwich, CT, 2020–2024
Creator: US Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

Utility gas is the most common heating fuel in Old Greenwich, used by 78.5% (±5.6 points) of occupied homes (2020–2024 American Community Survey).

14.9% heat with electricity.

4.0% heat with fuel oil or kerosene.

Figures last updated on November 12, 2026.

Utility gas: 78.5% (±5.6 points)
Electricity: 14.9%
Fuel oil, kerosene: 4.0%

Heating fuel in Old Greenwich

Occupied housing units by house heating fuel, 2020–2024
Fuel used most	Old Greenwich	Western Connecticut Planning Region	Connecticut	United States
Utility gas	78.5% (±5.6 points)	31.4%	36.3%	46.5%
Fuel oil, kerosene, etc.	4.0% (±2.0 points)	36.0%	36.3%	3.9%
Electricity	14.9% (±5.1 points)	23.0%	18.4%	41.3%
Bottled or tank gas (propane)	1.8% (±1.3 points)	7.1%	5.8%	4.9%
Wood	0.0% (±1.8 points)	0.8%	1.4%	1.4%
Solar energy	0.0% (±1.8 points)	0.2%	0.2%	0.3%
Coal or coke	0.0% (±1.8 points)	0.0%	0.0%	0.1%
Other fuel	0.8% (±0.9 points)	1.0%	1.0%	0.5%
No fuel used	0.0% (±1.8 points)	0.4%	0.5%	1.2%

The survey asks which fuel is used most to heat the home, so a home with a heat pump and an oil backup is counted once, under the one it uses most.

In Old Greenwich, the share of homes heating with fuel oil is lower than in Western Connecticut Planning Region (36.0%).

It is also lower than in Connecticut (36.3%).

It is not measurably different from the national figure (3.9%).

In Old Greenwich, the share of homes heating with electricity is lower than in Western Connecticut Planning Region (23.0%).

It is not measurably different from Connecticut (18.4%).

It is lower than the national figure (41.3%).

Homes heated by electricity in places near Old Greenwich

Nearest places with a published estimate, compared with Old Greenwich
Place	Distance	Homes heated by electricity	Compared with this place
Old Greenwich	—	14.9% (±5.1 points)	—
Riverside	1.1 mi	11.1% (±3.8 points)	Not measurably different
Cos Cob	2.3 mi	6.6% (±3.3 points)	Lower
Greenwich (community)	3.1 mi	22.7% (±4.4 points)	Higher
Stamford	4.3 mi	33.4% (±1.7 points)	Higher
Pemberwick	4.6 mi	14.1% (±8.4 points)	Not measurably different
Byram	4.7 mi	8.4% (±4.3 points)	Not measurably different
Noroton	4.8 mi	8.7% (±4.5 points)	Not measurably different
Darien	5.1 mi	10.8% (±2.8 points)	Not measurably different

Nearby places with a measurably lower figure: Cos Cob, CT (6.6%).

Nearby places with a measurably higher figure: Greenwich (community), CT (22.7%), Stamford, CT (33.4%).

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

Homes heated by fuel oil across Western Connecticut Planning Region, place by place

Rank	Place	Homes heated by fuel oil
27	Cos Cob	17.1% (±5.8 points)
28	Route 7 Gateway	14.1% (±8.9 points)
29	Byram	11.8% (±6.9 points)
30	Pemberwick	8.2% (±6.8 points)
31	Riverside	6.7% (±3.2 points)
32	Greenwich (community)	6.1% (±2.2 points)
33	Old Greenwich	4.0% (±2.0 points)

Showing 7 of 33 places in Western Connecticut Planning Region, ranked from highest to lowest.

Old Greenwich is a census-designated place: an unincorporated community the Census Bureau draws for statistics, with no municipal government of its own.

It lies inside Greenwich, whose figures include it.

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 Old Greenwich

What is the most common way to heat a home in Old Greenwich?

Utility gas is the most common heating fuel in Old Greenwich, used by 78.5% of occupied homes (2020–2024 American Community Survey).

How many homes in Old Greenwich heat with oil?

4.0% (±2.0 points) of occupied homes in Old Greenwich use fuel oil or kerosene as their main heating fuel.

How many homes in Old Greenwich have electric heat?

14.9% (±5.1 points) of occupied homes in Old Greenwich heat mainly with electricity, which includes heat pumps.

Sources

Selected Housing Characteristics (DP04), 2020–2024 ACS 5-year estimates — Old Greenwich CDP, 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 Old Greenwich CDP, Connecticut (place:56900, in state:09).

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_0063PE, DP04_0063PM, DP04_0066PE, DP04_0066PM, DP04_0065PE, DP04_0065PM, DP04_0064PE, DP04_0064PM, DP04_0068PE, DP04_0068PM, DP04_0069PE, DP04_0069PM, DP04_0067PE, DP04_0067PM, DP04_0070PE, DP04_0070PM, DP04_0071PE, DP04_0071PM

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.