Knox County, ME ZIP Codes

Maine (ME)  ·  20 ZIP codes  ·  20 cities
20
ZIP codes
41,084
population (2021)
+3.4%
pop change since 2010
23013
FIPS code
Knox County ZIP code map
About Knox County
Knox County is located in Maine and contains 20 ZIP codes across 20 cities and communities. The county's population was 41,084 as of 2021, an increase of 3.4% from 39,736 in 2010. The timezone is Central Time (observes DST). The Federal Information Processing System (FIPS) code for Knox County is 23013.
Population
2021 population41,084
2010 population39,736
Change+3.4%
County details
StateMaine
FIPS code23013
TimezoneCentral
Daylight savingYes
Cities in Knox County
Camden Cushing Friendship Hope Isle Au Haut Matinicus North Haven Owls Head Port Clyde Rockland Rockport South Thomaston Spruce Head Tenants Harbor Thomaston Union Vinalhaven Warren Washington West Rockport
ZIP codes for Knox County, ME (20)
ZIP code City County Map
04547 Friendship Knox View map
04563 Cushing Knox View map
04574 Washington Knox View map
04645 Isle Au Haut Knox View map
04841 Rockland Knox View map
04843 Camden Knox View map
04847 Hope Knox View map
04851 Matinicus Knox View map
04853 North Haven Knox View map
04854 Owls Head Knox View map
04855 Port Clyde Knox View map
04856 Rockport Knox View map
04858 South Thomaston Knox View map
04859 Spruce Head Knox View map
04860 Tenants Harbor Knox View map
04861 Thomaston Knox View map
04862 Union Knox View map
04863 Vinalhaven Knox View map
04864 Warren Knox View map
04865 West Rockport Knox View map

Demographics & statistics

40,325
Population
48.9
Median age
$71,898
Median household income
$38,604
Per capita income
$305,275
Median home value
$1,041
Median monthly rent
82.7%
Home ownership
8.7%
Poverty rate
2.9%
Unemployment
20,052
Housing units
38.2%
Bachelor's or higher

Age distribution

Male Female
795
Under 5
768
1,007
5–9
972
1,057
10–14
1,021
1,064
15–19
1,028
970
20–24
937
2,116
25–34
2,044
2,286
35–44
2,209
2,621
45–54
2,531
1,298
55–59
1,254
1,949
60–64
1,882
3,171
65–74
3,063
1,668
75–84
1,612
510
85+
492
← Male
Female →

Age summary

GroupCount%
Under 187,04716.7%
18 and over33,27883.3%
65 and over10,51629.7%
Median age48.9 years

Race & ethnicity

White 93.5%
Two or more races 3.2%
Hispanic or Latino 1.5%
Other race 0.8%
Black or African American 0.4%
Asian 0.4%
American Indian / Alaska Native 0.2%
GroupCount%
White38,27993.5%
Two or more races1,3273.2%
Hispanic or Latino6001.5%
Other race3140.8%
Black or African American1570.4%
Asian1460.4%
American Indian / Alaska Native980.2%

Household income

Under $10k 4.3%
$10k–$15k 4.0%
$15k–$25k 6.5%
$25k–$35k 6.3%
$35k–$50k 11.2%
$50k–$75k 18.7%
$75k–$100k 17.0%
$100k–$150k 16.5%
$150k–$200k 7.7%
$200k+ 7.9%
Range% of households
Under $10k4.3%
$10k–$15k4.0%
$15k–$25k6.5%
$25k–$35k6.3%
$35k–$50k11.2%
$50k–$75k18.7%
$75k–$100k17.0%
$100k–$150k16.5%
$150k–$200k7.7%
$200k+7.9%
Median income$71,898

Housing

Home values

Under $50k 3.6%
$50k–$100k 3.5%
$100k–$150k 8.6%
$150k–$200k 13.7%
$200k–$300k 26.1%
$300k–$500k 24.2%
$500k–$1M 15.7%
$1M+ 4.7%

Housing overview

MetricValue
Median home value$305,275
Median rent / month$1,041
Owner occupied82.7%
Renter occupied17.3%
Vacant29.1%
Single-family detached83.2%
Large apartment buildings0.9%
Mobile homes7.0%
Median rooms5.8
Avg household size (owned)2.29

Year built

Era%
2020 or later0.1%
2010–20195.6%
2000–200913.0%
1990–199913.0%
1980–198914.1%
1970–197912.1%
1960–19694.8%
1950–19594.4%
1940–19492.6%
1939 or earlier30.2%

Bedrooms

Size% of units
No bedroom (studio)1.9%
1 bedroom9.0%
2 bedrooms27.3%
3 bedrooms42.4%
4 bedrooms15.0%
5+ bedrooms4.5%

Vehicles per household

Vehicles% of households
No vehicle4.1%
1 vehicle30.1%
2 vehicles45.4%
3 or more20.5%

Heating fuel

Fuel type%
Utility gas0.9%
Electricity7.3%
Propane / LP gas18.2%
Fuel oil60.7%
Wood11.1%
Solar0.5%
No fuel used0.3%

Households & families

Household typeCount%
Married-couple family8,27452.1%
Cohabiting couple1,6688.8%
Male householder, no spouse2,66615.0%
Female householder, no spouse4,92924.2%
Households with children under 183,74121.8%
Households with seniors (65+)7,26044.3%
Average household size2.23

Marital status

StatusMaleFemale
Never married27.0%18.8%
Married55.7%56.4%
Separated0.4%1.5%
Widowed3.5%9.2%
Divorced13.4%14.1%

Education

Less than 9th grade 1.3%
Some HS, no diploma 4.3%
HS graduate 29.7%
Some college, no degree 18.1%
Associate's degree 8.4%
Bachelor's degree 23.7%
Graduate / professional 14.5%
Metric%
HS diploma or higher94.3%
Bachelor's or higher38.2%

School enrollment (ages 3–17)

TypeCount%
Nursery / preschool3194.2%
Kindergarten3395.3%
Elementary school2,93043.8%
High school1,83925.8%
College / grad school1,39920.8%

Employment

Industry of employment

Education & healthcare 22.1%
Retail trade 11.9%
Construction 10.1%
Professional & management 9.8%
Agriculture & mining 9.2%
Arts, food & hospitality 7.6%
Manufacturing 7.6%
Transportation & utilities 5.4%
Other services 5.0%
Finance & real estate 4.6%
Public administration 3.7%
Wholesale trade 1.7%
Information 1.3%

Occupation

Category%
Management, business & arts33.4%
Service16.5%
Sales & office17.9%
Natural resources & construction19.5%
Production & transportation12.8%

Employment type

Type%
Private sector72.5%
Government12.5%
Self-employed14.8%
Unpaid family workers0.1%

Commute

Method%
Drive alone72.8%
Carpool9.0%
Public transit0.1%
Walk4.5%
Other means1.7%
Avg commute (minutes)20.2

Poverty

All people 8.7%
Under 18 years 11.1%
18 and over 8.3%
Married-couple families 2.5%
Female-led households 25.5%

Income support

Source% of households
Social Security44.0%
Retirement income27.3%
Supplemental Security3.7%
Cash public assistance2.0%
Food stamps / SNAP7.0%

Health indicators

Condition%
High blood pressure33.9%
High cholesterol36.6%
Heart disease7.3%
Stroke3.2%
Asthma10.1%
Arthritis28.5%
Kidney disease3.1%
Pulmonary disease8.1%
Cancer8.1%
Behavior / access%
Binge drinking15.3%
No physical activity19.5%
Less than 7 hrs sleep30.7%
Fair or poor health12.2%
Poor mental health13.2%
Poor physical health9.6%
No health insurance12.1%
Visited doctor (checkup)78.0%
Visited dentist70.5%
Cholesterol screening90.7%
Teeth loss14.6%

Veterans & disability

VeteransCount%
Civilian veterans2,8119.4%
Disability%
Any disability12.7%
Under 183.2%
18–64 years10.0%
65 and over23.7%

Health insurance coverage

Type%
Private insurance67.1%
Public insurance44.4%
Uninsured under 196.5%

Language & origin

Language spoken at home (age 5+)

LanguageCount%
English only38,76296.0%
Spanish4640.9%
Other Indo-European2730.6%
Asian & Pacific Islander1670.2%
Other languages240.0%

Place of birth & citizenship

OriginCount%
Native born (US)39,09997.1%
Born in same state38,47895.8%
Born in different state22,28356.4%
Foreign born6211.2%
Naturalized citizen1,2262.9%
Not a US citizen62966.0%

Ancestry

AncestryCount%
French8,64021.4%
Italian5,42413.5%
Arab3,1597.8%
German1,2603.1%
Polish6881.7%
AncestryCount%
English4961.2%
Dutch1320.3%
Irish800.2%
Norwegian440.1%

Technology access

Metric% of households
Computer access44.2%
Internet access94.0%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Explore more Maine ZIP codes
All Maine ZIP codes Camden ZIP codes Cushing ZIP codes Friendship ZIP codes Hope ZIP codes Isle Au Haut ZIP codes Matinicus ZIP codes North Haven ZIP codes Owls Head ZIP codes Port Clyde ZIP codes Rockland ZIP codes
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