Town · Maine
Castine, Maine
Castine, town, in Hancock County, Maine. Castine had 1,310 residents on July 1, 2025 by the Census Bureau's estimate, down 0.7% since 2020; the 2020 Census counted 1,320 and the ACS 2020-2024 5-year estimates put it at 1,362 (±167). GEOID 2300911265.
Residents, July 2025 estimate
1,310
Census Bureau estimate (no margin published)
2020 Census count: 1,320 · ACS 2020-2024: 1,362 ±167
Median household income
$113,750
±$26,100 (90% margin)
Maine: $74,733
Median home value
$603,500
±$114,039 (90% margin)
Maine: $296,600
Median gross rent
$1,105
±$104 (90% margin)
Maine: $1,139
Where is Castine and what county is it in?
Castine is a town in Hancock County, Maine. It covers 7.8 square miles of land, 170 residents per square mile in 2020.
One place lies inside Castine: Castine (CDP, 1,014 in 2020).
Source: 2024 Gazetteer and 2020 place-by-county files, U.S. Census Bureau · Census reference files
How many people live in Castine, and is it growing?
The Census Bureau estimates that 1,310 people lived in Castine on July 1, 2025, down 0.7% since 2020, while Maine grew 3.8%. The 2020 Census counted 1,320 residents. The 2020-2024 American Community Survey, a five-year sample, puts the population at 1,362 (±167).
| Measure | Castine | Hancock County | Change since 2015-2019 |
|---|---|---|---|
| Total population | 1,362±167 | 56,460 | no clear change |
| Households | 352±71 | 25,572 | +127 |
| Average household size | 2.22±0.24 | 2.14 | no clear change |
| Housing units | 720±91 | 40,765 | no clear change |
Castine's population since 2000
From 1,343 in 2000 to 1,310 in 2025: down 2.5%. The 2000, 2010 and 2020 figures are census counts, each for Castine as it was drawn that year: a place that annexed land, or a community that has since incorporated, covered a different area then. The 2005 figure is the Census Bureau's intercensal estimate, revised to fit the 2000 and 2010 counts and drawn on 2010 boundaries; 2015 and 2025 are July 1 estimates made from the census before them.
Source: The 2000, 2010 and 2020 Census counts and the Census Bureau's population estimates (intercensal 2000-2010, Vintage 2020, Vintage 2025) · Census population estimates
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 Castine?
The median resident of Castine is 21.2 years old; 9.5% are under 18 and 19.9% are 65 or older. The largest group is non-Hispanic white residents at 84.4%, then non-Hispanic residents of two or more races at 6.9%. 6.1% of residents were born outside the United States.
| Measure | Castine | Hancock County | Change since 2015-2019 |
|---|---|---|---|
| Median age | 21.2±0.7 | 49.0 | no clear change |
| Under 18 years | 9.5%±4.5 pts | 16.2% | – |
| 65 years and over | 19.9%±4.4 pts | 26.6% | – |
| Male | 62.2%±6.7 pts | 48.9% | – |
| Hispanic or Latino (any race) | 5.0%±2.8 pts | 1.9% | – |
| White alone, not Hispanic | 84.4%±6.4 pts | 92.6% | −11.4 pts |
| Black or African American alone, not Hispanic | 3.7%±3.5 pts | 1.0% | – |
| Asian alone, not Hispanic | 0.0%±2.0 pts | 1.0% | – |
| American Indian and Alaska Native alone, not Hispanic | 0.0%±2.0 pts | 0.4% | – |
| Native Hawaiian and Other Pacific Islander alone, not Hispanic | 0.0%±2.0 pts | 0.0% | – |
| Two or more races, not Hispanic | 6.9%±4.2 pts | 2.8% | – |
| Some other race alone, not Hispanic | 0.0%±2.0 pts | 0.4% | – |
| Born outside the United States | 6.1%±3.4 pts | 3.3% | – |
| Speak a language other than English at home (age 5+) | 7.8%±7.6 pts | 3.3% | – |
| Civilian veterans (age 18+) | 5.5%±2.9 pts | 8.0% | – |
| With a disability | 12.9%±6.3 pts | 15.1% | – |
| No health insurance coverage | 2.6%±2.6 pts | 9.6% | – |
| High school graduate or higher (age 25+) | 99.8%±0.5 pts | 95.6% | – |
| Bachelor's degree or higher (age 25+) | 74.5%±8.1 pts | 40.1% | +22.0 pts |
| Graduate or professional degree (age 25+) | 43.4%±9.0 pts | 15.2% | – |
| Lived in the same house a year earlier | 79.8%±8.7 pts | 89.2% | – |
| Moved from another state in the past year | 5.9%±6.7 pts | 2.7% | – |
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 Castine earn?
Half of Castine's 352 households earn less than $113,750 a year (±$26,100), against $72,744 in Hancock County and $74,733 in Maine. In 2015-2019 the median was $76,662 in 2024 dollars, so it rose by $37,088 after inflation. 14.1% of residents live below the poverty line.
| Measure | Castine | Hancock County | Change since 2015-2019 |
|---|---|---|---|
| Median household income | $113,750±$26,100 | $72,744 | +$37,088 |
| Mean household income | $131,597±$24,368 | $97,122 | – |
| Per capita income | $39,304±$6,839 | $44,241 | +$15,264 |
| People below the poverty line | 14.1%±9.2 pts | 9.9% | no clear change |
| Children under 18 below the poverty line | 20.2%±21.6 pts | 11.4% | – |
| Households receiving SNAP | 7.1%±5.9 pts | 8.4% | – |
| Households with a computer | 99.4%±0.8 pts | 93.9% | – |
| Households with a broadband subscription | 96.3%±3.9 pts | 91.2% | – |
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 Castine?
Owners occupy 80.4% of Castine's occupied homes and renters 19.6%. The median owner-occupied home is valued at $603,500 by its owner (±$114,039). The median renter pays $1,105 a month including utilities, and 60.3% of renters pay 35% or more of their income on rent.
| Measure | Castine | Hancock County | Change since 2015-2019 |
|---|---|---|---|
| Median home value (owner-occupied) | $603,500±$114,039 | $310,400 | +$190,602 |
| Median gross rent | $1,105±$104 | $1,061 | no clear change |
| Renters paying 35% or more of income on rent | 60.3%±37.6 pts | 39.3% | no clear change |
| Median monthly owner costs, with a mortgage | $2,045±$370 | $1,673 | – |
| Owner-occupied homes | 80.4%±10.5 pts | 78.5% | +22.6 pts |
| Renter-occupied homes | 19.6%±10.5 pts | 21.5% | – |
| Housing units | 720±91 | 40,765 | no clear change |
| Homeowner vacancy rate | 5.9%±6.6 pts | 1.3% | – |
| Rental vacancy rate | 0.0%±31.7 pts | 6.7% | – |
| Single-family detached homes | 86.9%±5.7 pts | 80.9% | – |
| Mobile homes | 6.9%±5.5 pts | 7.4% | – |
| Built 2020 or later | 0.0%±3.7 pts | 1.2% | – |
| Built 2010 to 2019 | 3.1%±2.7 pts | 8.7% | – |
| Built 1939 or earlier | 31.0%±7.2 pts | 22.1% | – |
| Households with no vehicle | 6.5%±5.5 pts | 6.2% | – |
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 many new homes is Castine building?
Builders took permits for 1 new housing units in Castine in 2025 (1 in single-family houses), 0.8 per 1,000 residents against 4.9 across Maine.
Counts of units in permits a local office issued; not every permitted unit is built. A year marked with months was reported for part of the year.
Source: Building Permits Survey, annual place files 2019-2025, U.S. Census Bureau · Census Building Permits Survey
How do people in Castine work and get to work?
46.3% of Castine's workers drive alone. The average trip to work takes 14.2 minutes.
| Measure | Castine | Hancock County | Change since 2015-2019 |
|---|---|---|---|
| In the labor force (age 16+) | 52.1%±11.5 pts | 60.0% | – |
| Unemployment rate | 2.7%±4.1 pts | 4.6% | – |
| Drove alone to work | 46.3%±16.6 pts | 68.2% | – |
| Carpooled | 8.6%±8.9 pts | 11.9% | – |
| Public transportation | 0.0%±4.3 pts | 0.5% | – |
| Walked | 32.2%±9.4 pts | 4.3% | – |
| Worked from home | 11.7%±11.0 pts | 13.7% | – |
| Mean travel time to work | 14.2 min±2.7 | 25.4 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 Castine?
No census tract lies mostly in Castine; 1 tract reaches into it (2020 census blocks).
| Tract | Residents, 2020-2024 | Median household income |
|---|---|---|
| Tract 9664Hancock County | 2,516 | $74,050 |
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 Castine) · Census block assignment files
How does Castine compare with other places in Maine?
By the Census Bureau's July 2025 estimates, Castine is the 6,496th-most populous of the 16,079 U.S. towns and townships that have one and the 209th-most populous of 454 in Maine.
Castine ranks 16th of 349 places in Maine with 1,000 or more residents and a reliable estimate, by median household income.
| Measure | Rank | Of |
|---|---|---|
| Population, July 2025 estimate | 209th | 454 |
| Growth 2020-2025 (PEP) | 256th | 273 |
| Residents per square mile | 136th | 353 |
| Median household income | 16th | 349 |
| Per capita income | 183rd | 353 |
| Median home value | 16th | 352 |
| Median gross rent | 124th | 301 |
| Poverty rate | 93rd | 277 |
| Bachelor's degree or higher | 4th | 352 |
| Median age | 352nd | 353 |
| Owner-occupied share | 193rd | 353 |
| Travel time to work | 336th | 352 |
Castine's figures with every place in Maine (CSV)
Every place in Maine, sortable · Compare Castine 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 Castine?
20 of the 57 figures for Castine 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 Castine 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.