PlainZIP

South Thomaston, ME · standard

ZIP Code 04858

Knox County, Maine - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

1,533
52/sq mi
$87,059
Median income
$341,300
Median home value
44.4%
Bachelor's or higher

The verdict

South Thomaston pairs an above-median household income with above-median home values, in a rural, homeowner-dominated area.

Top 30%
household income, US ZIPs
Top 28%
home value, US ZIPs
52
people per sq mi
93%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 04858 against every reporting US ZIP.

ZIP code 04858 covers 29.5 square miles in South Thomaston, Knox County, Maine (a standard USPS delivery area), with a modest 1,533 residents on file, a density of 52 people per square mile, in the New York time zone.

ZIP 04858 lands in the middle-income range, with a median household income of $87,059 (18% above the Maine average), while per-capita income is $47,373. Local economic indicators show a 4.2% poverty rate alongside 0.0% unemployment. Housing costs here run $341,300 for a typical home value (20% above the state average), with rent averaging $925 a month; 92.9% of homes are owner-occupied.

A solid share of residents have a four-year degree: 44.4% of adults hold a bachelor's degree or higher, the median age is 54.1, and the average commute is -. Beyond these figures, 9 nearby ZIP codes within about 10 miles are surfaced below, along with 6 more sharing Knox County, letting you compare 04858 to its immediate surroundings rather than a national baseline alone.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 04858

Top 5 sectors by establishment count in South Thomaston, ME

Which industries have the most business establishments in ZIP 04858.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 04858, South Thomaston, ME · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

1,533

Population

29.5

Area (sq mi)

52

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 04858?

54.1

Median Age

45.7%

Male

54.3%

Female

0.3%

Foreign-Born

White 96.9%
African American 0.0%
Asian 0.0%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.4%
Two or More Ethnicities 2.2%
Hispanic or Latino 0.0%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$87,059

Median Household Income

+18% vs state

$47,373

Per Capita Income

4.2%

Poverty Rate

0.0%

Unemployment Rate

How ZIP 04858 ranks nationally

South Thomaston, ME household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$87,059 Top 30% higher than 70% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). This entry sits in this band. $100,000–$120,000: 2,855 US ZIPs (9%). Above this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 80.5%
Bachelor's Degree or Higher 44.4%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

809

Total Housing Units

608

Occupied Units

201

Vacant Units

2.27

Avg Household Size

Occupancy Type

Owner 92.9%
Renter 7.1%

$341,300

Median Home Value

+20% vs state

$925

Median Rent

1981

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What businesses operate in this ZIP?

Census Bureau data shows 41 business establishments in ZIP 04858, employing approximately 167 people with a combined annual payroll of $6,635,000.

41

Businesses

167

Employees

$6.6M

Annual Payroll

4

Industry Sectors

Industry Establishments % of Total
Agriculture, forestry, fishing and hunting 13 31.7%
Construction 6 14.6%
Professional, scientific, and technical services 6 14.6%
Other services (except public administration) 3 7.3%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 04858 vs 04859 →

ZIP 04858 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 04858 ranks #8 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 04858 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 04858 ranks #3 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
04859 Spruce Head, ME 724 4.0 mi
04861 Thomaston, ME 2,781 3.5 mi
04854 Owls Head, ME 1,580 3.3 mi
04841 Rockland, ME 7,297 5.6 mi
04563 Cushing, ME 1,534 5.9 mi
04856 Rockport, ME 3,330 9.2 mi
04860 Tenants Harbor, ME 1,591 6.7 mi
04864 Warren, ME 4,751 7.6 mi
04855 Port Clyde, ME 307 9.5 mi

More ZIP Codes in Knox County

04841 standard
Rockland, ME
Pop: 7,297
04843 standard
Camden, ME
Pop: 4,851
04864 standard
Warren, ME
Pop: 4,751
04862 standard
Union, ME
Pop: 3,592
04856 standard
Rockport, ME
Pop: 3,330
04861 standard
Thomaston, ME
Pop: 2,781

Related Areas

Knox County South Thomaston, ME Maine

Frequently Asked Questions

What county is ZIP code 04858 in? ▼
ZIP code 04858 (South Thomaston) is located in Knox County, Maine. Knox County contains multiple ZIP codes, see the full list at /counties/knox-me.
What is the population of ZIP code 04858? ▼
ZIP code 04858 in South Thomaston, ME has a population of 1,533 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 04858? ▼
The median household income in ZIP 04858 is $87,059, which is 14% above the national average of $76,288.
What is the average home value in ZIP 04858? ▼
The median home value in ZIP 04858 is $341,300, which is 23% above the national average of $278,155.
What is the demographic makeup of ZIP 04858? ▼
The largest racial group in ZIP 04858 is White at 96.9%.
How many businesses are in ZIP code 04858? ▼
ZIP code 04858 has 41 business establishments employing approximately 167 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 04858? ▼
The top industries by establishment count in ZIP 04858 are: Agriculture, forestry, fishing and hunting (13), Construction (6), Professional, scientific, and technical services (6). There are 4 industry sectors represented in total.
What is the education level in ZIP code 04858? ▼
In ZIP code 04858, 80.5% of residents aged 25+ have a high school diploma or higher, and 44.4% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 04858? ▼
In ZIP code 04858, approximately 92.9% of occupied housing units are owner-occupied and 7.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 04858? ▼
The poverty rate in ZIP code 04858 is 4.2% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.