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 Moderate-density area
- $87,059
- Median income Above-median income area
- $341,300
- Median home value Above-median home value
- 44.4%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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 average Maine ZIP), while per-capita income is $47,373. Both reported hardship measures are comparatively low in absolute terms: poverty is 4.2% and unemployment is 0.0%. Housing is both higher-cost and owner-heavy: median home value is $341,300 (20% above the average Maine ZIP), while 92.9% of occupied homes are owner-occupied and median rent is $925.
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 -. The page also surfaces 9 ZIP codes within roughly 10 miles and 6 more in Knox County, so 04858 can be compared with both its immediate and county-level context.
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.
- Agriculture, forestry, fishing and hunting
Agriculture, forestry, fishing and hunting
13 establishments
- Construction
Construction
6 establishments
- Professional, scientific, and technical services
Professional, scientific, and technical services
6 establishments
- Other services (except public administration) 3
Other services (except public administration)
3 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, 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
Who lives in ZIP 04858?
54.1
Median Age
45.7%
Male
54.3%
Female
0.3%
Foreign-Born
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 ZIP avg
$47,373
Per Capita Income
4.2%
Poverty Rate
0.0%
Unemployment Rate
How ZIP 04858 ranks among Maine ZIPs
South Thomaston, ME household income vs. every Maine ZIP code
Median household income among 395 reporting Maine ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$87,059 Top 22% higher than 78% of 395 Maine ZIPs
Each bar is a $20K-wide band; taller bars hold more Maine 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
809housing units
809
Total Housing Units
608
Occupied Units
201
Vacant Units
2.27
Avg Household Size
Occupancy Type
$341,300
Median Home Value
+20% vs state ZIP avg
$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.
- 04841
Rockland (04841)
7,297 residents
- 04864
Warren (04864)
4,751 residents
- 04856
Rockport (04856)
3,330 residents
- 04861 2,781
Thomaston (04861)
2,781 residents
- 04860 1,591
Tenants Harbor (04860)
1,591 residents
- 04854 1,580
Owls Head (04854)
1,580 residents
- 04563 1,534
Cushing (04563)
1,534 residents
- 04858 1,533
South Thomaston (04858)
1,533 residents
- 04859 724
Spruce Head (04859)
724 residents
What this shows Among its immediate neighbors, ZIP 04858 ranks #8 by population - useful context the national average alone can't give.
ZIP 04858 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 04855
Port Clyde (04855)
$250,000 median income
- 04854 $87,325
Owls Head (04854)
$87,325 median income
- 04858 $87,059
South Thomaston (04858)
$87,059 median income
- 04856 $86,979
Rockport (04856)
$86,979 median income
- 04860 $86,833
Tenants Harbor (04860)
$86,833 median income
- 04563 $83,500
Cushing (04563)
$83,500 median income
- 04859 $75,341
Spruce Head (04859)
$75,341 median income
- 04864 $74,616
Warren (04864)
$74,616 median income
- 04841 $56,533
Rockland (04841)
$56,533 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 04858, both outside ME so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (1,533 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Knox County
Related Areas
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.
Related
Take this with you
What to do with ZIP 04858's numbers, next.
- See how ZIP 04858 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where South Thomaston, ME ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.