County · Maine

Sagadahoc County, Maine

Sagadahoc County, Maine. Sagadahoc County had 37,979 residents in 2025 by the Census Bureau's estimate, up 3.5% since 2020, in line with Maine (+3.8%). It holds 13 places (1 city, village or borough, 9 towns and townships and 3 census-designated) and 9 census tracts. GEOID 23023.

Sagadahoc County is one of the 3 counties of the Portland-South Portland, ME metropolitan statistical area (the Census Bureau's July 2023 delineation).

Residents, July 2025 estimate

37,979

Census Bureau estimate (no margin published)
2020 Census count: 36,699 · ACS 2020-2024: 37,285

Median household income

$87,806

±$5,189 (90% margin)
Maine: $74,733

Median home value

$333,300

±$12,584 (90% margin)
Maine: $296,600

Median gross rent

$1,098

±$82 (90% margin)
Maine: $1,139

How many people live in Sagadahoc County, and is it growing?

The 2020 Census counted 36,699 residents in Sagadahoc County. The Census Bureau estimates 37,979 for July 1, 2025, up 3.5% since 2020, in line with Maine (+3.8%). The 2020-2024 American Community Survey puts the population at 37,285 over 254 square miles of land.

July 2020→2021 +447 (37,178)
2021→2022 +245 (37,423)
2022→2023 +153 (37,576)
2023→2024 +118 (37,694)
2024→2025 +285 (37,979)

Sagadahoc County in Maine. Boundaries: Census Bureau 2024.

Counts, ACS 2020-2024 5-year estimates, with the change from 2015-2019
Measure	Sagadahoc County	Maine	Change since 2015-2019
Total population	37,285	1,387,817	+1,833
Households	16,446±370	597,159	no clear change
Average household size	2.25±0.05	2.26	no clear change
Housing units	19,239±42	751,876	+409

Sagadahoc County's population since 2000

From 35,214 in 2000 to 37,979 in 2025: up 7.9%. The 2000, 2010 and 2020 figures are census counts. 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.

2000 Census 35,214
2005 (estimate) 35,813
2010 Census 35,293
2015 (estimate) 35,137
2020 Census 36,699
2025 (estimate) 37,979

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); PEP Vintage 2025 (CO-EST2025); 2020 Census · Check it at data.census.gov

What cities and towns are in Sagadahoc County?

Sagadahoc County holds 13 places: 1 city, village or borough (an incorporated place), 9 towns and townships (county subdivisions with their own government) and 3 census-designated places. The largest is Topsham with 9,982 residents (2025 estimate). Places that cross a county line are listed with the share of their 2020 residents who live in this county.

Places in Sagadahoc County, ACS 2020-2024 5-year estimates. Ring: estimate with a coefficient of variation over 40%.

Topsham	town	9,560	9,706±19	$91,028	$360,800	6.4%	100%
Bath	city	8,766	8,815±16	$69,390	$310,900	12.4%	100%
Topsham CDP	CDP	6,623	7,271±483	$100,024	$388,500	5.7%	100%
Richmond	town	3,522	3,566±15	$65,854	$242,700	12.4%	100%
Bowdoin	town	3,136	3,188±15	$91,239	$292,800	11.0%	100%
Woolwich	town	3,068	3,158±29	$102,175	$254,500	13.3%	100%
Bowdoinham	town	3,047	3,142±22	$108,479	$405,500	13.5%	100%
Phippsburg	town	2,155	2,238±331	$107,833	$335,800	7.5%	100%
West Bath	town	1,910	1,863±275	$103,333	$422,800	3.2%	100%
Richmond CDP	CDP	1,810	2,089±271	$73,014	$221,100	7.1%	100%
Georgetown	town	1,058	1,012±238	$84,250	$427,200	6.3%	100%
Bowdoinham CDPGEOID 2306330	CDP	734	766±324	not published	$419,400	21.8%	100%
Arrowsic	town	477	597±157	$99,107	$584,200	16.1%	100%

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026); 2020 place-by-county parts · Check it at data.census.gov

Who lives in Sagadahoc County?

The median resident of Sagadahoc County is 47.3 years old; 17.6% are under 18 and 24.6% are 65 or older. The largest group is non-Hispanic white residents at 92.0%, then non-Hispanic residents of two or more races at 4.4%. 2.5% of residents were born outside the United States.

Age, origin and education, ACS 2020-2024 5-year estimates. Race groups are non-Hispanic; Hispanic includes any race.
Measure	Sagadahoc County	Maine	Change since 2015-2019
Median age	47.3±0.4	44.8	no clear change
Under 18 years	17.6%±0.2 pts	18.1%	–
65 years and over	24.6%±0.3 pts	22.4%	–
Hispanic or Latino (any race)	2.0%	2.2%	+0.3 pts
White alone, not Hispanic	92.0%±1.0 pts	89.9%	−2.6 pts
Black or African American alone, not Hispanic	0.5%±0.3 pts	1.8%	no clear change
Asian alone, not Hispanic	0.7%±0.3 pts	1.1%	no clear change
American Indian and Alaska Native alone, not Hispanic	0.0%±0.1 pts	0.3%	–
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0.0%±0.1 pts	0.0%	–
Two or more races, not Hispanic	4.4%±1.1 pts	4.2%	–
Some other race alone, not Hispanic	0.4%±0.3 pts	0.4%	–
Born outside the United States	2.5%±0.5 pts	4.1%	−1.5 pts
Speak a language other than English at home (age 5+)	2.8%±0.7 pts	6.0%	–
Civilian veterans (age 18+)	10.7%±1.2 pts	8.4%	–
With a disability	13.7%±1.2 pts	15.8%	–
No health insurance coverage	5.3%±1.2 pts	6.2%	no clear change
High school graduate or higher (age 25+)	95.7%±0.7 pts	94.8%	–
Bachelor's degree or higher (age 25+)	44.2%±2.3 pts	36.2%	+7.8 pts
Graduate or professional degree (age 25+)	17.9%±1.6 pts	13.7%	–
Moved from another state in the past year	4.2%±1.2 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 Sagadahoc County earn?

Half of Sagadahoc County's 16,446 households earn less than $87,806 a year (±$5,189), against $74,733 in Maine. In 2015-2019 the median was $78,388 in 2024 dollars, so it rose by $9,418 after inflation. 10.0% of residents live below the poverty line.

Income and poverty in 2024 dollars, ACS 2020-2024 5-year estimates
Measure	Sagadahoc County	Maine	Change since 2015-2019
Median household income	$87,806±$5,189	$74,733	+$9,418
Mean household income	$107,102±$5,209	$100,102	–
Per capita income	$47,808±$2,315	$43,742	+$5,134
People below the poverty line	10.0%±1.7 pts	10.7%	no clear change
Children under 18 below the poverty line	10.3%±4.5 pts	13.1%	no clear change
Households receiving SNAP	8.7%±1.7 pts	12.0%	–
Households with a broadband subscription	93.9%±1.5 pts	90.3%	–

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 Sagadahoc County?

Owners occupy 77.8% of Sagadahoc County's occupied homes and renters 22.2%. The median owner-occupied home is valued at $333,300 by its owner (±$12,584). The median renter pays $1,098 a month including utilities, and 32.8% of renters pay 35% or more of their income on rent.

Housing, ACS 2020-2024 5-year estimates
Measure	Sagadahoc County	Maine	Change since 2015-2019
Median home value (owner-occupied)	$333,300±$12,584	$296,600	+$70,670
Median gross rent	$1,098±$82	$1,139	no clear change
Renters paying 35% or more of income on rent	32.8%±8.0 pts	37.9%	no clear change
Median monthly owner costs, with a mortgage	$1,817±$60	$1,729	–
Owner-occupied homes	77.8%±1.9 pts	74.3%	+3.3 pts
Housing units	19,239±42	751,876	+409
Homeowner vacancy rate	0.5%±0.7 pts	0.7%	–
Rental vacancy rate	5.5%±3.4 pts	4.2%	–
Single-family detached homes	75.4%±2.0 pts	70.0%	–
Mobile homes	7.7%±1.4 pts	8.2%	–
Built 2020 or later	1.1%±0.6 pts	1.4%	–
Built 1939 or earlier	27.1%±2.2 pts	22.9%	–

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 Sagadahoc County building?

Builders took permits for 258 new housing units across Sagadahoc County in 2025 (136 single-family), 6.8 per 1,000 residents.

2019 105 units
2020 123 units
2021 162 units
2022 180 units
2023 171 units
2024 185 units
2025 258 units

Source: Building Permits Survey, annual county files 2019-2025, U.S. Census Bureau · Census Building Permits Survey

How do people in Sagadahoc County get to work?

71.2% of Sagadahoc County's workers drive alone and 16.9% work from home. The average trip to work takes 25.8 minutes. The unemployment rate in 2020-2024 averaged 4.6%.

Work and commuting, ACS 2020-2024 5-year estimates
Measure	Sagadahoc County	Maine	Change since 2015-2019
In the labor force (age 16+)	62.7%±1.7 pts	61.7%	–
Unemployment rate	4.6%±1.7 pts	3.8%	+2.2 pts
Drove alone to work	71.2%±3.0 pts	70.8%	–
Carpooled	7.6%±2.0 pts	7.9%	–
Public transportation	0.3%±0.4 pts	0.5%	–
Walked	2.8%±0.9 pts	3.4%	–
Worked from home	16.9%±2.5 pts	15.9%	+10.5 pts
Mean travel time to work	25.8 min±1.4	24.6 min	+2.5 min

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 are Sagadahoc County's census tracts?

Sagadahoc County is divided into 9 census tracts. Among those with a reliable estimate, median household income runs from $65,854 (Tract 9701) to $106,852 (Tract 9707).

Census tracts of Sagadahoc County, ACS 2020-2024 5-year estimates; sort by any column

Tract 970123023970100	Richmond (53%)	3,522	3,566±15	$65,854	$242,700	$1,077	12.4%
Tract 970223023970200	Bowdoinham (14%)	6,183	6,330±32	$94,853	$336,900	$914	12.2%
Tract 9703.0123023970301	Topsham (36%)	5,192	4,648±394	$98,627	$347,700	$1,195	6.7%
Tract 9703.0223023970302	Topsham (94%)	4,368	5,058±393	$88,274	$370,300	$1,462	6.2%
Tract 970423023970400	–	4,603	4,767±278	$100,461	$325,700	$1,552	12.2%
Tract 970523023970500	Bath	5,434	5,669±382	$71,711	$311,400	$1,082	10.5%
Tract 970623023970600	Bath	3,332	3,146±384	$67,824	$309,300	$984	15.7%
Tract 970723023970700	–	4,065	4,101±282	$106,852	$369,400	$1,063	5.6%
Tract 990023023990000	–	0	0±11	not published	not published	not published	–

Source: American Community Survey 2020-2024 5-year estimates, U.S. Census Bureau (released January 2026) · Check it at data.census.gov

How does Sagadahoc County compare with Maine's other counties?

Sagadahoc County's rank among Maine's counties with a reliable estimate (1 = highest)
Measure	Rank
Population	12th of 16
Growth 2020-2025	10th of 16
Residents per square mile	4th of 16
Median household income	3rd of 16
Median home value	3rd of 16
Median gross rent	4th of 16
Poverty rate	11th of 16
Bachelor's degree or higher	2nd of 16
Median age	9th of 16

Every county in Maine

Source: PlainCities ranks 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 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 Sagadahoc County 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.