Castine vs Southwest Harbor

A side-by-side comparison of Castine and Southwest Harbor: population, income, housing, and more.

Castine and Southwest Harbor are places in Maine. This page compares them across population, income, housing, education, commuting, and how each has changed since 2019.

Castine has the higher population (926 vs 563 in Southwest Harbor). Castine has the higher median household income ($143,229 vs $31,518 in Southwest Harbor). Castine has the higher median home value ($658,200 vs $407,700 in Southwest Harbor).

Population, income & housing

	Castine	Southwest Harbor
Population	926	563
Median age	20.5 yrs	58.1 yrs
Median household income	$143,229	$31,518
Median home value	$658,200	$407,700
Median gross rent	—	$903
Housing units	456	644
Homeownership rate	87.3%	26.1%
Bachelor's degree or higher	86.2%	27.9%
Unemployment rate	2.2%	21.5%

Trends (ACS 5-year, 2019–2023)

	Castine	Southwest Harbor
Population	806 → 926 (+14.9%)	647 → 563 (-13.0%)
Median household income	$138,125 → $143,229 (+3.7%)	$41,646 → $31,518 (-24.3%)
Median home value	$523,800 → $658,200 (+25.7%)	$327,500 → $407,700 (+24.5%)
Median gross rent	$1,125 → $850 (-24.4%)	$413 → $903 (+118.6%)

Castine

Population

806926

Median household income

$138,125$143,229

Median home value

$523,800$658,200

Median gross rent

$1,125$850

Southwest Harbor

Population

647563

Median household income

$41,646$31,518

Median home value

$327,500$407,700

Median gross rent

$413$903

Age & race/ethnicity

Age distribution (share)

	Castine	Southwest Harbor
Under 5	0.0%	4.8%
5 to 17	8.2%	13.9%
18 to 24	57.3%	1.2%
25 to 34	1.4%	13.5%
35 to 44	1.7%	8.2%
45 to 54	5.3%	6.6%
55 to 64	6.7%	11.4%
65 to 74	10.6%	17.2%
75 and over	8.7%	23.3%

Race & ethnicity (share)

	Castine	Southwest Harbor
White (non-Hispanic)	89.6%	97.0%
Black or African American	1.9%	2.1%
American Indian & Alaska Native	0.0%	0.0%
Asian	0.0%	0.0%
Native Hawaiian & Pacific Islander	0.0%	0.0%
Some other race	0.0%	0.0%
Two or more races	4.6%	0.7%
Hispanic or Latino	3.8%	0.2%

Educational attainment (age 25+)

Share of adults 25+

	Castine	Southwest Harbor
No high school diploma	0.0%	1.6%
High school graduate	1.6%	29.5%
Some college or associate's	12.2%	41.0%
Bachelor's degree	28.8%	19.1%
Graduate or professional degree	57.4%	8.9%

Commute to work

How workers get to work (share)

	Castine	Southwest Harbor
Drove alone	29.5%	84.3%
Carpooled	6.0%	0.0%
Public transit	0.0%	0.0%
Walked	52.7%	7.5%
Bicycle	0.0%	4.5%
Worked from home	11.8%	3.7%
Other means	0.0%	0.0%

Housing

Units in structure (share)

	Castine	Southwest Harbor
1-unit, detached	93.4%	54.0%
1-unit, attached	1.3%	0.0%
2 to 4 units	3.3%	16.8%
5 to 19 units	2.0%	14.3%
20 or more units	0.0%	14.9%
Mobile home & other	0.0%	0.0%

Poverty & households

	Castine	Southwest Harbor
Poverty rate	0.8%	12.8%
Average household size	2.28	1.69
Mean commute (minutes)	12	9
Median year structure built	1965	1972