Demographics of Old Lyme town, Connecticut

Old Lyme town, Connecticut had 7,702 people on July 1, 2025, by the Census Bureau’s estimate: +110 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Old Lyme town, in four figures

7,702
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 7,679 ±18.; +1.4%
Change since July 2020: +110 people.; 50.6 ±3.3
Median age: ACS 2020–⁠2024.; $131,899 ±$11,250
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a town, so the change is the difference between one July estimate and the next.

Old Lyme town, Connecticut's population grew 1.4% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Old Lyme town, Connecticut's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Old Lyme town, Connecticut's population grew 1.4% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Old Lyme town, Connecticut's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	7,592	100.0	100.0
2021	7,653	100.8	100.2
2022	7,671	101.0	100.7
2023	7,679	101.1	101.6
2024	7,683	101.2	102.5
2025	7,702	101.4	103.1

Population of Old Lyme town, Connecticut on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	7,592	—
2021	7,653	+61
2022	7,671	+18
2023	7,679	+8
2024	7,683	+4
2025	7,702	+19

Age, 2020–2024

The median age is 50.6 ±3.3: for men 49.7 ±3.5 and for women 51.4 ±3.6. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Old Lyme town by age, ACS 2020–2024
Age	People	Share	Connecticut	United States
Under 5	452 ±148	5.9% ±1.9	5.0% ±<0.1	5.6% ±<0.1
5 to 17	1,107 ±183	14.4% ±2.4	15.2% ±0.1	16.3% ±<0.1
18 to 24	381 ±121	5.0% ±1.6	9.3% ±0.1	9.1% ±<0.1
25 to 44	1,255 ±219	16.3% ±2.9	25.3% ±0.1	26.9% ±<0.1
45 to 64	2,460 ±306	32.0% ±4.0	26.7% ±0.1	24.8% ±<0.1
65 and over	2,024 ±239	26.4% ±3.1	18.5% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $131,899 ±$11,250, and income per person $83,426 ±$13,345, in 2024 dollars. The median is $95,781 ±$732 in Connecticut and $80,734 ±$166 in the United States.

Households by income

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Households in Old Lyme town by income, ACS 2020–2024
Household income	Households	Share	Connecticut	United States
Under $25,000	215 ±98	6.8% ±3.0	12.9% ±0.3	14.6% ±<0.1
$25,000 to $49,999	238 ±87	7.5% ±2.7	13.7% ±0.3	16.7% ±<0.1
$50,000 to $74,999	272 ±100	8.5% ±3.1	13.3% ±0.3	15.5% ±<0.1
$75,000 to $99,999	435 ±120	13.7% ±3.7	11.9% ±0.3	12.6% ±<0.1
$100,000 to $149,999	654 ±165	20.5% ±5.0	17.7% ±0.3	17.5% ±<0.1
$150,000 to $199,999	388 ±119	12.2% ±3.7	11.3% ±0.2	9.6% ±<0.1
$200,000 or more	983 ±174	30.9% ±5.1	19.2% ±0.3	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Old Lyme town by age, ACS 2020–2024
Age	Below poverty	Rate	Connecticut	United States
All ages	221 ±88	2.9% ±1.2	10.0% ±0.2	12.5% ±0.1
Under 18	0 to 42	0% to 2.8%	13.0% ±0.5	16.1% ±0.1
18 to 59	9 to 125	0.3% to 3.7%	9.4% ±0.3	11.6% ±0.1
60 and over	138 ±65	5.1% ±2.3	8.9% ±0.3	11.0% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Housing, 2020–2024

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Housing in Old Lyme town, ACS 2020–2024
Measure	Old Lyme town	Connecticut	United States
Housing units	4,598 ±269	1,541,822 ±276	143,775,355 ±10,234
Occupied	69.3% ±1.6	93.0% ±0.2	89.9% ±0.1
Vacant	30.7% ±4.3	7.0% ±0.2	10.1% ±0.1
Owner occupied	88.8% ±2.0	66.5% ±0.4	65.2% ±0.3
Renter occupied	11.2% ±3.1	33.5% ±0.3	34.8% ±0.1
Median home value	$484,200 ±$21,146	$366,900 ±$1,621	$332,700 ±$236
Median gross rent	$2,238 ±$295	$1,488 ±$10	$1,413 ±$2
Median year built	1965 ±3	1967 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Old Lyme town by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Connecticut	United States
Hispanic or Latino	206 to 640	2.7% to 8.3%	18.3% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	6,724 ±298	87.6% ±3.9	61.9% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	4 to 58	0.1% to 0.8%	9.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	53 to 315	0.7% to 4.1%	4.7% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 19	0% to 0.2%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 19	0% to 0.2%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	0 to 15	0% to 0.2%	0.9% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	119 to 503	1.5% to 6.6%	4.3% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Old Lyme town by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Connecticut	United States
Born in the state	4,121 ±343	53.7% ±4.5	53.3% ±0.3	57.3% ±<0.1
Born in another state	2,766 ±326	36.0% ±4.2	27.1% ±0.2	26.9% ±<0.1
Born a citizen outside the states	123 ±60	1.6% ±0.8	3.9% ±0.1	1.7% ±<0.1
Born abroad	669 ±201	8.7% ±2.6	15.7% ±0.2	14.1% ±<0.1
Naturalized citizens	372 ±123	4.8% ±1.6	8.7% ±0.1	7.4% ±<0.1
Not citizens	120 to 474	1.6% to 6.2%	7.1% ±0.2	6.8% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Old Lyme town among the places and towns of Connecticut

131st of 168 places and towns of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the Connecticut page.

Places of Connecticut near Old Lyme town in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Litchfield town	8,260 ±48
New Milford CDP	8,188 ±1,057
Southwood Acres CDP	8,115 ±716
Thompsonville CDP	7,927 ±960
Middlebury town	7,807 ±43
Old Lyme town	7,679 ±18
Easton town	7,670 ±31
Cos Cob CDP	7,546 ±960
Thomaston town	7,492 ±27
Staples CDP	7,340 ±695
Glastonbury Center CDP	7,266 ±930

Rankings this appears in

No. 3 Places in Connecticut by median age
No. 3 Places in Connecticut by median rent
No. 6 Places in Connecticut by homeownership rate
No. 12 Places in Connecticut by per capita income
No. 20 Places in Connecticut by median household income
No. 26 Places in Connecticut by median home value

Sources

Census Bureau population estimates — incorporated places and New England towns — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — incorporated places and New England towns and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026