CoverFi
Data updated 2026-10-07

ZIP Code 04858 · South Thomaston, ME

Knox County · pop 1,378 · ACS 2020–2024

The median household income in ZIP Code 04858 (South Thomaston, ME) is $87,059, higher than 76% of the other ZIP Codes in Maine.

Its FHFA home price index changed +46.1% over the five years to 2022.

01 — Where it stands

$87,059
Median household income
± $6,554 MOE
$341,300
Median home value
± $37,168 MOE
$925
Median gross rent
4.2%
Poverty rate
Percentiles for ZIP Code 04858 within Knox County, Maine and the U.S.
MeasureValueCounty percentileState percentileU.S. percentile
Median household income$87,059 ± $6,55492nd percentile (14 ZIP Codes compared)76th percentile (270 ZIP Codes compared)67th percentile (22,922 ZIP Codes compared)
Per capita income$47,37346th percentile (14 ZIP Codes compared)76th percentile (270 ZIP Codes compared)74th percentile (22,922 ZIP Codes compared)
Poverty rate4.2%0th percentile (14 ZIP Codes compared)7th percentile (270 ZIP Codes compared)9th percentile (22,922 ZIP Codes compared)
Adults with a bachelor’s degree or higher44.4%69th percentile (14 ZIP Codes compared)84th percentile (270 ZIP Codes compared)80th percentile (22,922 ZIP Codes compared)
Owner-occupied homes92.9%92nd percentile (14 ZIP Codes compared)90th percentile (270 ZIP Codes compared)95th percentile (22,922 ZIP Codes compared)
Housing vacancy rate24.8%53rd percentile (14 ZIP Codes compared)62nd percentile (270 ZIP Codes compared)89th percentile (22,922 ZIP Codes compared)
Median home value$341,300 ± $37,16853rd percentile (14 ZIP Codes compared)75th percentile (270 ZIP Codes compared)67th percentile (22,833 ZIP Codes compared)
Median gross rent$9250th percentile (14 ZIP Codes compared)34th percentile (265 ZIP Codes compared)35th percentile (22,865 ZIP Codes compared)
Income inequality (Gini index)0.40715th percentile (14 ZIP Codes compared)36th percentile (270 ZIP Codes compared)33rd percentile (22,922 ZIP Codes compared)
Average adjusted gross income per return$65,80430th percentile (14 ZIP Codes compared)51st percentile (269 ZIP Codes compared)42nd percentile (22,230 ZIP Codes compared)
Returns with AGI of $200,000 or more5.0%53rd percentile (14 ZIP Codes compared)72nd percentile (269 ZIP Codes compared)60th percentile (22,230 ZIP Codes compared)
Home price index, 5-year change+46.1%33rd percentile (13 ZIP Codes compared)8th percentile (211 ZIP Codes compared)35th percentile (18,843 ZIP Codes compared)
Business establishments per 1,000 residents29.838th percentile (14 ZIP Codes compared)71st percentile (270 ZIP Codes compared)79th percentile (22,700 ZIP Codes compared)
Average annual pay per employee$39,7310th percentile (14 ZIP Codes compared)17th percentile (270 ZIP Codes compared)21st percentile (22,551 ZIP Codes compared)

Percentile groups: Knox County · Maine · U.S. Hover a percentile for the number of ZIP Codes compared. MOE = 90% margin of error.

02 — Home prices

+25.1%
1-year change
2021–2022
+46.1%
5-year change
2017–2022
+77.9%
10-year change
2012–2022

Home price index — ZIP Code 04858

Home price index, ZIP Code 04858, 2001–2022Line chart of the annual home price index: 100.0 in 2001 and 212.2 in 2022. Every value is listed in the data table below the chart.10015020025020012005201020152022212.2

FHFA ZIP Code index (2001 = 100) — annual, developmental, not seasonally adjusted.

Data table
Home price index by year, ZIP Code 04858
YearIndexAnnual change
2001100.0—
2002102.2+2.2%
2003113.4+11.0%
2004124.6+9.9%
2005142.4+14.3%
2006148.0+3.9%
2007146.9−0.7%
2008157.5+7.2%
2009133.4−15.3%
2010136.0+1.9%
2011132.8−2.4%
2012119.3−10.2%
2013123.7+3.7%
2014132.5+7.2%
2015114.0−14.0%
2016124.7+9.3%
2017145.2+16.5%
2018140.3−3.4%
2019144.9+3.3%
2020154.6+6.7%
2021169.5+9.7%
2022212.2+25.1%

03 — Nearby ZIP Codes

ZIP Code 04858 and nearby ZIP Codes
ZIPPlaceDistanceMedian household incomeMedian home valuePoverty rate5-yr HPI change
04858South Thomaston, MEthis ZIP Code$87,059$341,3004.2%+46.1%
04854Owls Head, ME3.1 mi$87,325$413,3005.7%+35.3%
04859Spruce Head, ME3.5 mi$75,341$356,5262.9%+53.6%
04861Thomaston, ME4.3 mi$56,435$271,7006.6%+80.0%
04563Cushing, ME5.7 mi$83,500$409,8007.7%+35.3%
04841Rockland, ME6.1 mi$56,533$245,80010.4%+91.9%
04864Warren, ME7.2 mi$74,616$232,7006.0%+93.5%

Up to six nearest ZIP Code Tabulation Areas within 30 miles, by straight-line distance between Census center points (2024 Gazetteer).

04 — Business mix

41
Establishments
167
Employees
$6.6M
Annual payroll
$39,731
Average pay per employee
Establishments by sector, ZIP Code 04858
SectorEstablishmentsShare of ZIPU.S. shareRelative concentration
Agriculture, forestry, fishing & hunting1331.7%0.2%207.4×
Construction614.6%9.6%1.5×
Professional, scientific & technical services614.6%11.7%1.2×
Other services37.3%9.5%0.8×

Counts are establishments (business locations), not jobs. Relative concentration = the sector’s share of establishments here divided by its share in the U.S. (1.0× = the same share). Average pay is shown only where at least 20 employees are reported. ZIP Code Business Patterns 2023.

05 — About this data

How percentiles are calculated

Percentiles compare this ZIP Code with other ZIP Codes in the same county, the same state and the whole country. Only ZIP Codes with their own American Community Survey estimate, a population of at least 1,000 and a published median household income are compared, and only those with a value for the measure. A percentile of 64th means the value is higher than 64% of the other ZIP Codes in that group (0 is the lowest value, 100 the highest); it describes the size of a number, not a judgment about the area. County and state percentiles are left blank when the group has fewer than 5 ZIP Codes. The number of ZIP Codes compared is shown with each percentile.

Census figures are published for ZIP Code Tabulation Areas, which approximate USPS ZIP Code delivery areas; values shown as — are not published or are suppressed by the source.

Use of this page

Area statistics only. These figures describe a ZIP Code area — not any person or household — and do not rate the area or the people who live there. CoverFi is not a consumer reporting agency; do not use this page to make decisions about credit, insurance, employment or housing.

Sources

  1. U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ZIP Code Tabulation Areas. Estimates are survey-based and have margins of error.
  2. U.S. Census Bureau, ZIP Code Business Patterns 2023 (establishment counts by NAICS sector; employment and payroll totals).
  3. Federal Housing Finance Agency, House Price Index for five-digit ZIP Codes, census tracts and counties — annual, developmental, not seasonally adjusted.
  4. IRS Statistics of Income, Individual Income Tax ZIP Code Data, tax year 2022.
  5. U.S. Census Bureau, 2024 Gazetteer Files (ZCTA locations, used for nearby ZIP Codes).
  6. HUD USPS ZIP Code Crosswalk Files (ZIP-to-tract and ZIP-to-county assignment).

This product uses Census Bureau data but is not endorsed or certified by the Census Bureau. This product uses the HUD User Data API but is not endorsed or certified by HUD User. ZIP Code Tabulation Areas are Census approximations of USPS ZIP Code delivery areas and may not match them exactly. ZIP Code is a trademark of the United States Postal Service.