04858 ZIP Code — South Thomaston, ME

Knox County, Maine

ZIP code 04858 is located in South Thomaston, Maine, within Knox County. It covers approximately 11.42 square miles and serves a population of 1,371 residents. This is a standard ZIP code in the Eastern (ET) timezone, served by area code 207.

About ZIP code 04858

The housing stock consists of predominantly single-family detached homes. Most homes were built in the pre-1940, giving the area an established character. Median home value is $276,500. Owner-occupancy is high at 89%, well above the national average.

Median household income is $80,658. The poverty rate of 4% is below the national average. 51% of households receive Social Security income, suggesting a notable retiree or disability population.

The dominant occupation class is management, business, and professional, with retail trade as the leading industry. The average commute of 17 minutes is near the national average.

Educational attainment is near the national average, with 43% of residents holding a bachelor's degree or higher.

Notable community characteristics include a notable veteran presence at 11% of civilians, above the national average of 7%.

Overall, ZIP code 04858 reflects a community defined by a strong veteran community, high homeownership, and a significant Social Security-dependent population.

1,371

population

11.42

sq mi land

Standard

ZIP type

Eastern (ET)

timezone

04858 ZIP code map

Cities in ZIP code 04858

Below are the cities the US Postal Service accepts for ZIP code 04858. Using any city not on this list may result in mail delivery delays.

City	Status
South Thomaston	Acceptable
South Thomaston	Preferred

Nearby ZIP codes

04859 Spruce Head (2.4 mi) 04859 Spruce Head (2.4 mi) 04854 Owls Head (2.9 mi) 04861 Thomaston (4.3 mi) 04563 Cushing (5.5 mi) 04841 Rockland (6.2 mi) 04860 Tenants Harbor (6.4 mi) 04547 Friendship (7.8 mi) 04864 Warren (7.8 mi) 04856 Rockport (9.5 mi) 04572 Waldoboro (11.9 mi) 04843 Camden (13.3 mi)

Demographics updated 06/2026

Population
Total population	1,371
Population density	120 / sq mi
State FIPS	23
County FIPS	013

Geography
Land area	11.42 sq mi
Water area	3.23 sq mi
Latitude	44.0365
Longitude	-69.1471
Timezone	Eastern (ET)
Area code	207

Total population by age

Gender

Race & ethnicity

Economics updated 06/2026

Household income

Income range	This ZIP	County avg	State avg
Under $50k	34.1%	42.0%	42.3%
$50k – $100k	40.9%	34.5%	32.3%
$100k – $200k	21.1%	19.0%	20.6%
Over $200k	3.9%	4.6%	4.9%

Demographics & statistics

1,371

Population

120

People per sq mi

48.8

Median age

$80,658

Median household income

$40,274

Per capita income

$276,500

Median home value

$1,163

Median monthly rent

88.9%

Home ownership

4.2%

Poverty rate

0.0%

Unemployment

790

Housing units

43.4%

Bachelor's or higher

Age distribution

Male Female

Under 5

5–9

10–14

15–19

20–24

25–34

35–44

45–54

55–59

60–64

127

65–74

156

75–84

85+

← Male

Female →

Age summary

Group	Count	%
Under 18	201	14.7%
18 and over	1,170	85.3%
65 and over	423	30.9%
Median age	48.8 years

Race & ethnicity

White 97.5%

Two or more races 1.5%

Hispanic or Latino 0.5%

Other race 0.5%

Group	Count	%
White	1,344	97.5%
Two or more races	20	1.5%
Hispanic or Latino	7	0.5%
Other race	7	0.5%

Household income

Income range	This ZIP	County avg	State avg
Under $50k	34.1%	42.0%	42.3%
$50k – $100k	40.9%	34.5%	32.3%
$100k – $200k	21.1%	19.0%	20.6%
Over $200k	3.9%	4.6%	4.9%

Under $10k 2.4%

$10k–$15k 3.1%

$15k–$25k 7.1%

$25k–$35k 5.5%

$35k–$50k 10.0%

$50k–$75k 14.9%

$75k–$100k 23.5%

$100k–$150k 17.1%

$150k–$200k 10.6%

$200k+ 5.7%

Range	% of households
Under $10k	2.4%
$10k–$15k	3.1%
$15k–$25k	7.1%
$25k–$35k	5.5%
$35k–$50k	10.0%
$50k–$75k	14.9%
$75k–$100k	23.5%
$100k–$150k	17.1%
$150k–$200k	10.6%
$200k+	5.7%
Median income	$80,658

Housing

Home values

Under $50k 3.7%

$50k–$100k 4.7%

$100k–$150k 10.7%

$150k–$200k 8.2%

$200k–$300k 27.4%

$300k–$500k 28.4%

$500k–$1M 15.2%

$1M+ 1.8%

Housing overview

Metric	Value
Median home value	$276,500
Median rent / month	$1,163
Owner occupied	88.9%
Renter occupied	11.1%
Vacant	32.3%
Single-family detached	92.9%
Large apartment buildings	0.0%
Mobile homes	5.0%
Median rooms	5.6
Avg household size (owned)	2.46

Year built

Era	%
2020 or later	0.0%
2010–2019	4.8%
2000–2009	17.6%
1990–1999	12.6%
1980–1989	14.2%
1970–1979	17.9%
1960–1969	4.7%
1950–1959	5.4%
1940–1949	2.7%
1939 or earlier	20.1%

Bedrooms

Size	% of units
No bedroom (studio)	0.5%
1 bedroom	9.8%
2 bedrooms	30.4%
3 bedrooms	43.1%
4 bedrooms	13.5%
5+ bedrooms	2.7%

Vehicles per household

Vehicles	% of households
No vehicle	3.6%
1 vehicle	32.2%
2 vehicles	37.9%
3 or more	26.3%

Heating fuel

Fuel type	%
Utility gas	3.1%
Electricity	1.0%
Propane / LP gas	14.0%
Fuel oil	69.2%
Wood	12.6%

Households & families

Household type	Count	%
Married-couple family	334	57.8%
Cohabiting couple	17	2.9%
Male householder, no spouse	101	17.5%
Female householder, no spouse	126	21.8%
Households with children under 18	141	24.4%
Households with seniors (65+)	294	50.9%
Average household size	2.37

Marital status

Status	Male	Female
Never married	20.0%	26.6%
Married	67.6%	55.7%
Separated	0.0%	0.0%
Widowed	3.2%	9.6%
Divorced	9.2%	8.1%

Education

Less than 9th grade 0.5%

Some HS, no diploma 2.7%

HS graduate 33.9%

Some college, no degree 17.1%

Associate's degree 2.4%

Bachelor's degree 29.5%

Graduate / professional 13.9%

Metric	%
HS diploma or higher	96.8%
Bachelor's or higher	43.4%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	8	2.6%
Kindergarten	16	5.2%
Elementary school	71	23.0%
High school	66	21.4%
College / grad school	148	47.9%

Employment

Industry of employment

Retail trade 29.0%

Education & healthcare 19.1%

Professional & management 8.9%

Arts, food & hospitality 8.7%

Manufacturing 7.7%

Construction 7.5%

Transportation & utilities 5.2%

Other services 3.7%

Agriculture & mining 3.0%

Public administration 2.4%

Finance & real estate 2.2%

Information 1.5%

Wholesale trade 1.3%

Occupation

Category	%
Management, business & arts	34.0%
Service	10.0%
Sales & office	33.8%
Natural resources & construction	11.8%
Production & transportation	10.3%

Employment type

Type	%
Private sector	78.1%
Government	14.9%
Self-employed	6.5%
Unpaid family workers	0.4%

Commute

Method	%
Drive alone	85.1%
Carpool	8.0%
Public transit	0.6%
Walk	0.3%
Work from home	4.3%
Other means	1.7%
Avg commute (minutes)	16.9

Poverty

All people 4.2%

Under 18 years 4.7%

18 and over 4.1%

Married-couple families 0.9%

Female-led households 7.4%

Income support

Source	% of households
Social Security	50.9%
Retirement income	40.5%
Supplemental Security	2.6%
Cash public assistance	1.0%
Food stamps / SNAP	7.1%

Health indicators

Condition	%
Obesity	29.2%
High blood pressure	33.0%
High cholesterol	36.2%
Diabetes	9.2%
Heart disease	7.0%
Stroke	3.0%
Asthma	9.8%
Arthritis	27.9%
Kidney disease	2.9%
Pulmonary disease	7.5%
Cancer	8.2%

Behavior / access	%
Smoking	14.9%
Binge drinking	15.6%
No physical activity	18.7%
Less than 7 hrs sleep	30.4%
Depression	21.3%
Fair or poor health	11.1%
Poor mental health	12.8%
Poor physical health	8.9%
No health insurance	11.8%
Visited doctor (checkup)	78.0%
Visited dentist	72.6%
Cholesterol screening	91.1%
Teeth loss	13.4%

Veterans & disability

Veterans	Count	%
Civilian veterans	132	11.3%

Disability	%
Any disability	18.9%
Under 18	0.0%
18–64 years	18.5%
65 and over	28.6%

Health insurance coverage

Type	%
Private insurance	68.4%
Public insurance	43.8%
No insurance	6.1%
Uninsured under 19	9.0%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	1,319	96.2%
Spanish	14	1.1%
Other Indo-European	14	1.1%
Asian & Pacific Islander	0	0.0%
Other languages	0	0.0%

Place of birth & citizenship

Origin	Count	%
Native born (US)	1,358	99.1%
Born in same state	1,343	98.0%
Born in different state	804	58.6%
Foreign born	15	1.1%
Naturalized citizen	13	0.9%
Not a US citizen	13	100.0%

Ancestry

Ancestry	Count	%
French	506	36.9%
Italian	210	15.3%
Arab	102	7.4%
German	55	4%
Polish	29	2.1%

Ancestry	Count	%
English	9	0.7%
Dutch	6	0.4%
Irish	3	0.2%
Norwegian	2	0.1%

Technology access

Metric	% of households
Computer access	42.2%
Internet access	90.7%

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

Frequently asked questions about ZIP code 04858

What city is ZIP code 04858 in?

ZIP code 04858 is primarily assigned to South Thomaston, Maine.

What county is ZIP code 04858 in?

ZIP code 04858 falls within Knox County, Maine.

Does ZIP code 04858 have an older population?

31% of residents in ZIP code 04858 are 65 or older, above the national average of ~17%.

Does ZIP code 04858 have a large retiree population?

51% of households in ZIP code 04858 receive Social Security income, suggesting a significant retiree or disability population.

Is ZIP code 04858 mostly owner-occupied?

89% of occupied units in ZIP code 04858 are owner-occupied, well above the national average.

Does ZIP code 04858 have a large veteran population?

11% of civilians in ZIP code 04858 are veterans, above the national average of ~7%.

What timezone is ZIP code 04858 in?

ZIP code 04858 observes the EST timezone.