04645 ZIP Code — Isle Au Haut, ME

Knox County, Maine

ZIP code 04645 is located in Isle Au Haut, Maine, within Knox County. It covers approximately 12.52 square miles and serves a population of 43 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 207.

population

12.52

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

04645 ZIP code map

Cities in ZIP code 04645

Below are the cities the US Postal Service accepts for ZIP code 04645. Using any city not on this list may result in mail delivery delays.

City	Status
Isle Au Haut	Acceptable

Demographics updated 05/2026

Population
Total population	43
Population density	3 / sq mi
State FIPS	23
County FIPS	013

Geography
Land area	12.52 sq mi
Water area	28.27 sq mi
Latitude	44.0482
Longitude	-68.6302
Timezone	Eastern (ET)
Area code	207

Total population by age

Gender

Race & ethnicity

Economics updated 05/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	63.2%	42.0%	42.3%
$50k – $100k	0.0%	34.5%	32.3%
$100k – $200k	21.1%	19.0%	20.6%
Over $200k	15.8%	4.6%	4.9%

Demographics & statistics

Population

People per sq mi

71.3

Median age

Median household income

$140,688

Per capita income

$687,500

Median home value

Median monthly rent

80.6%

Home ownership

4.7%

Poverty rate

0.0%

Unemployment

128

Housing units

65.1%

Bachelor's or higher

Age distribution

Male Female

25–34

65–74

75–84

← Male

Female →

Age summary

Group	Count	%
Under 18	0	0.0%
18 and over	43	100.0%
65 and over	40	93.0%
Median age	71.3 years

Race & ethnicity

White 100%

Group	Count	%
White	43	100%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	63.2%	42.0%	42.3%
$50k – $100k	0.0%	34.5%	32.3%
$100k – $200k	21.1%	19.0%	20.6%
Over $200k	15.8%	4.6%	4.9%

$25k–$35k 41.9%

$35k–$50k 6.5%

$75k–$100k 9.7%

$100k–$150k 22.6%

$200k+ 19.4%

Range	% of households
$25k–$35k	41.9%
$35k–$50k	6.5%
$75k–$100k	9.7%
$100k–$150k	22.6%
$200k+	19.4%
Median income	$0

Housing

Home values

$100k–$150k 12.0%

$200k–$300k 8.0%

$500k–$1M 64.0%

$1M+ 16.0%

Housing overview

Metric	Value
Median home value	$687,500
Median rent / month	$0
Owner occupied	80.6%
Renter occupied	19.4%
Vacant	76.9%
Single-family detached	100.0%
Large apartment buildings	0.0%
Mobile homes	0.0%
Median rooms	5.1
Avg household size (owned)	1.36

Year built

Era	%
2020 or later	0.0%
2010–2019	0.0%
2000–2009	5.2%
1990–1999	20.9%
1980–1989	12.7%
1970–1979	7.5%
1960–1969	0.0%
1950–1959	4.5%
1940–1949	3.7%
1939 or earlier	45.5%

Bedrooms

Size	% of units
No bedroom (studio)	6.0%
1 bedroom	17.2%
2 bedrooms	20.9%
3 bedrooms	29.1%
4 bedrooms	16.4%
5+ bedrooms	10.4%

Vehicles per household

Vehicles	% of households
No vehicle	0.0%
1 vehicle	19.4%
2 vehicles	35.5%
3 or more	45.2%

Heating fuel

Fuel type	%
Propane / LP gas	22.6%
Fuel oil	6.5%
Wood	61.3%
No fuel used	9.7%

Households & families

Household type	Count	%
Married-couple family	13	41.9%
Cohabiting couple	2	6.5%
Male householder, no spouse	16	51.6%
Female householder, no spouse	0	0.0%
Households with children under 18	0	0.0%
Households with seniors (65+)	28	90.3%
Average household size	1.39

Marital status

Status	Male	Female
Never married	10.7%	0.0%
Married	35.7%	86.7%
Separated	0.0%	0.0%
Widowed	0.0%	0.0%
Divorced	53.6%	13.3%

Education

Less than 9th grade 0.0%

Some HS, no diploma 0.0%

HS graduate 34.9%

Some college, no degree 0.0%

Associate's degree 0.0%

Bachelor's degree 25.6%

Graduate / professional 39.5%

Metric	%
HS diploma or higher	100.0%
Bachelor's or higher	65.1%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	0	0.0%
Kindergarten	0	0.0%
Elementary school	0	0.0%
High school	0	0.0%
College / grad school	0	0.0%

Employment

Industry of employment

Agriculture & mining 35.7%

Construction 28.6%

Public administration 28.6%

Education & healthcare 7.1%

Occupation

Category	%
Management, business & arts	42.9%
Service	0.0%
Sales & office	0.0%
Natural resources & construction	57.1%
Production & transportation	0.0%

Employment type

Type	%
Private sector	25.0%
Government	28.6%
Self-employed	46.4%
Unpaid family workers	0.0%

Commute

Method	%
Drive alone	21.4%
Carpool	0.0%
Public transit	0.0%
Walk	42.9%
Work from home	25.0%
Other means	10.7%
Avg commute (minutes)	0.0

Poverty

All people 4.7%

Under 18 years 0.0%

18 and over 4.7%

Married-couple families 0.0%

Female-led households 0.0%

Income support

Source	% of households
Social Security	90.3%
Retirement income	58.1%
Supplemental Security	0.0%
Cash public assistance	0.0%
Food stamps / SNAP	0.0%

Health indicators

Condition	%
Obesity	30.8%
High blood pressure	36.5%
High cholesterol	38.1%
Diabetes	10.7%
Heart disease	8.4%
Stroke	3.5%
Asthma	9.7%
Arthritis	29.9%
Kidney disease	3.4%
Pulmonary disease	8.2%
Cancer	8.7%

Behavior / access	%
Smoking	15.1%
Binge drinking	15.4%
No physical activity	19.3%
Less than 7 hrs sleep	30.7%
Depression	20.2%
Fair or poor health	12.4%
Poor mental health	12.1%
Poor physical health	9.8%
No health insurance	11.4%
Visited doctor (checkup)	78.8%
Visited dentist	71.0%
Cholesterol screening	92.0%
Teeth loss	14.5%

Veterans & disability

Veterans	Count	%
Civilian veterans	4	9.3%

Disability	%
Any disability	11.6%
Under 18	0.0%
18–64 years	0.0%
65 and over	12.5%

Health insurance coverage

Type	%
Private insurance	60.5%
Public insurance	93.0%
No insurance	0.0%
Uninsured under 19	0.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	43	100.0%
Spanish	0	0.0%
Other Indo-European	0	0.0%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	43	100.0%
Born in same state	43	100.0%
Born in different state	10	23.3%
Foreign born	0	0.0%
Naturalized citizen	0	0.0%
Not a US citizen	0	0.0%

Ancestry

Ancestry	Count	%
French	21	48.8%
Polish	6	14%

Ancestry	Count	%
Italian	5	11.6%

Technology access

Metric	% of households
Computer access	72.1%
Internet access	67.7%

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

Frequently asked questions about ZIP code 04645

What city is ZIP code 04645 in?

ZIP code 04645 is primarily assigned to Isle Au Haut, Maine.

What county is ZIP code 04645 in?

ZIP code 04645 falls within Knox County, Maine.

Does ZIP code 04645 have an older population?

93% of residents in ZIP code 04645 are 65 or older, above the national average of ~17%.

Does ZIP code 04645 have a large retiree population?

90% of households in ZIP code 04645 receive Social Security income, suggesting a significant retiree or disability population.

How educated is the population of ZIP code 04645?

65% of residents hold a bachelor's degree or higher — well above the national average of ~33%, reflecting a highly educated population.

Is ZIP code 04645 mostly owner-occupied?

81% of occupied units in ZIP code 04645 are owner-occupied, well above the national average.

What timezone is ZIP code 04645 in?

ZIP code 04645 observes the EST timezone.