Census-designated place · Connecticut
Old Mystic, Connecticut
Old Mystic, census-designated place, in Southeastern Connecticut Planning Region, Connecticut. Old Mystic had 3,493 residents in the 2020 Census, a full count; the ACS 2020-2024 5-year estimates put it at 3,340 (±451). GEOID 0957180.
Residents, 2020 Census
3,493
Census count or controlled total
ACS 2020-2024 estimate: 3,340 ±451
Median household income
$130,903
±$17,373 (90% margin)
Connecticut: $95,781
Median home value
$342,500
±$15,838 (90% margin)
Connecticut: $366,900
Median gross rent
$1,602
±$668 (90% margin)
Connecticut: $1,488
Where is Old Mystic and what county is it in?
Old Mystic is a census-designated place: an unincorporated community the Census Bureau draws for counting, with no city government of its own, in Southeastern Connecticut Planning Region, Connecticut. It covers 4.3 square miles of land, 814 residents per square mile in 2020.
Old Mystic is in the Norwich-New London-Willimantic, CT metropolitan statistical area (Census Bureau delineation, July 2023).
Old Mystic lies entirely within Groton, a town with its own local government (2020 census blocks).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Old Mystic, and is it growing?
The 2020 Census counted 3,493 residents in Old Mystic, a full count rather than a sample. The 2020-2024 American Community Survey, a sample, estimates 3,340 (±451).
The Census Bureau publishes yearly population estimates for incorporated places only; Old Mystic is a census-designated place, so its figures come from the ACS and the 2020 Census.
| Measure | Old Mystic | Southeastern Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Total population | 3,340 ±451 | 279,971 | no clear change |
| Households | 1,263 ±149 | 115,768 | no clear change |
| Average household size | 2.64 ±0.27 | 2.32 | no clear change |
| Housing units | 1,390 ±149 | 126,425 | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); Census PEP Vintage 2025 (SUB-EST2025, CO-EST2025); 2020 Census P.L. 94-171 · Check it at data.census.gov
Who lives in Old Mystic?
The median resident of Old Mystic is 46.3 years old; 20.1% are under 18 and 20.7% are 65 or older. The largest group is non-Hispanic white residents at 84.6%, then Hispanic or Latino residents (of any race) at 6.6%. 10.8% of residents were born outside the United States.
| Measure | Old Mystic | Southeastern Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median age | 46.3 ±6.4 | 41.1 | no clear change |
| Under 18 years | 20.1% ±3.7 pts | 19.3% | – |
| 65 years and over | 20.7% ±3.9 pts | 19.5% | – |
| Male | 50.3% ±4.1 pts | 50.0% | – |
| Hispanic or Latino (any race) | 6.6% ±4.8 pts | 15.0% | – |
| White alone, not Hispanic | 84.6% ±6.5 pts | 70.6% | no clear change |
| Black or African American alone, not Hispanic | 1.9% ±1.6 pts | 4.9% | – |
| Asian alone, not Hispanic | 4.8% ±3.9 pts | 3.7% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0% ±1.3 pts | 0.3% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0% ±1.3 pts | 0.0% | – |
| Two or more races, not Hispanic | 2.0% ±2.1 pts | 4.8% | – |
| Some other race alone, not Hispanic | 0.0% ±1.3 pts | 0.6% | – |
| Born outside the United States | 10.8% ±4.8 pts | 8.8% | no clear change |
| Speak a language other than English at home (age 5+) | 7.7% ±4.7 pts | 15.3% | – |
| Civilian veterans (age 18+) | 11.2% ±3.6 pts | 8.0% | – |
| With a disability | 16.7% ±4.1 pts | 14.8% | – |
| No health insurance coverage | 7.2% ±4.5 pts | 4.7% | – |
| High school graduate or higher (age 25+) | 95.9% ±2.2 pts | 92.8% | – |
| Bachelor's degree or higher (age 25+) | 40.2% ±7.0 pts | 35.8% | no clear change |
| Graduate or professional degree (age 25+) | 18.5% ±5.2 pts | 16.0% | – |
| Lived in the same house a year earlier | 89.4% ±5.7 pts | 88.1% | – |
| Moved from another state in the past year | 3.8% ±2.4 pts | 3.3% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profiles DP02, DP05) · Check it at data.census.gov
What do households in Old Mystic earn?
Half of Old Mystic's 1,263 households earn less than $130,903 a year (±$17,373), against $86,586 in Southeastern Connecticut Planning Region and $95,781 in Connecticut. In 2015-2019 the median was $103,029 in 2024 dollars, so it rose by $27,874 after inflation.
| Measure | Old Mystic | Southeastern Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $130,903 ±$17,373 | $86,586 | +$27,874 |
| Mean household income | $149,355 ±$18,790 | $111,769 | – |
| Per capita income | $56,218 ±$8,893 | $47,133 | no clear change |
| People below the poverty line | 5.3% ±3.7 pts | 10.7% | – |
| Children under 18 below the poverty line | 4.2% ±6.5 pts | 15.1% | – |
| Households receiving SNAP | 6.9% ±4.7 pts | 12.4% | – |
| Households with a computer | 94.6% ±4.7 pts | 95.2% | – |
| Households with a broadband subscription | 94.0% ±4.8 pts | 91.6% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What does housing cost in Old Mystic?
Owners occupy 90.3% of Old Mystic's occupied homes and renters 9.7%. The median owner-occupied home is valued at $342,500 by its owner (±$15,838). The median renter pays $1,602 a month including utilities.
| Measure | Old Mystic | Southeastern Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $342,500 ±$15,838 | $323,400 | +$49,103 |
| Median gross rent | $1,602 ±$668 | $1,365 | no clear change |
| Renters paying 35% or more of income on rent | 6.2% ±10.8 pts | 40.7% | – |
| Median monthly owner costs, with a mortgage | $2,148 ±$269 | $2,140 | – |
| Owner-occupied homes | 90.3% ±5.6 pts | 65.1% | no clear change |
| Renter-occupied homes | 9.7% ±5.6 pts | 34.9% | – |
| Housing units | 1,390 ±149 | 126,425 | no clear change |
| Homeowner vacancy rate | 1.3% ±2.5 pts | 0.6% | – |
| Rental vacancy rate | 16.8% ±24.8 pts | 4.4% | – |
| Single-family detached homes | 88.3% ±5.8 pts | 61.1% | – |
| Mobile homes | 0.0% ±3.0 pts | 2.3% | – |
| Built 2020 or later | 1.3% ±1.5 pts | 0.8% | – |
| Built 2010 to 2019 | 1.2% ±1.4 pts | 4.0% | – |
| Built 1939 or earlier | 2.2% ±2.0 pts | 23.6% | – |
| Households with no vehicle | 5.4% ±4.1 pts | 7.4% | – |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP04) · Check it at data.census.gov
How do people in Old Mystic work and get to work?
83.2% of Old Mystic's workers drive alone and 14.1% work from home. The average trip to work takes 25.9 minutes.
| Measure | Old Mystic | Southeastern Connecticut Planning Region | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 60.6% ±6.2 pts | 64.0% | – |
| Unemployment rate | 3.2% ±2.5 pts | 5.0% | – |
| Drove alone to work | 83.2% ±6.2 pts | 75.5% | – |
| Carpooled | 1.5% ±1.7 pts | 7.0% | – |
| Public transportation | 0.0% ±2.7 pts | 1.4% | – |
| Walked | 1.0% ±1.4 pts | 2.9% | – |
| Worked from home | 14.1% ±5.6 pts | 11.7% | – |
| Mean travel time to work | 25.9 min ±4.0 | 23.9 min | no clear change |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) (Data Profile DP03) · Check it at data.census.gov
What census tracts are in Old Mystic?
1 census tract lies mostly in Old Mystic (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 7021Southeastern Connecticut Planning Region | 4,575 | $128,750 |
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 block assignment files (tract share = share of the tract's census blocks in Old Mystic) · Census block assignment files
How does Old Mystic compare with other places in Connecticut?
Old Mystic ranks 87th of 294 places in Connecticut with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population (ACS 2020-2024) | 208th | 303 |
| Residents per square mile | 155th | 303 |
| Median household income | 87th | 294 |
| Per capita income | 163rd | 303 |
| Median home value | 183rd | 300 |
| Median gross rent | 109th | 266 |
| Bachelor's degree or higher | 193rd | 297 |
| Median age | 115th | 301 |
| Owner-occupied share | 53rd | 300 |
| Work from home | 187th | 279 |
| Travel time to work | 175th | 302 |
Old Mystic's figures with every place in Connecticut (CSV)
Every place in Connecticut, sortable · Compare Old Mystic with other places
Source: PlainCities ranks computed from the American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) and PEP Vintage 2025 · How ranks are computed
How reliable are the figures for Old Mystic?
22 of the 57 figures for Old Mystic on this page carry a coefficient of variation over 40% and are marked with a ring: they come from a small sample, so read them as rough.
The American Community Survey samples about one household in eight over five years, so every figure is an estimate with a 90% margin of error (shown under each value). A ring marks an estimate whose coefficient of variation is over 40%. A change is called only when the gap between the two periods is larger than their combined 90% margin (the square root of the sum of the two squared margins), the Census Bureau's test. How to read a margin of error.
Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026): margins of error as published · ACS technical documentation
How these figures are made: methodology and release checks · reading a margin of error · every state · corrections
Not on this page: crime, weather and schools for Old Mystic are other agencies' records. Crime: the FBI's Crime Data Explorer · climate: NOAA's U.S. Climate Normals · schools: the National Center for Education Statistics' school search.