04858 ZIP Code Profile, Map, Data & Demographics

Related Place Profiles:
South Thomaston, ME

ZIP Code 04858: Basic Data & USPS Preferred City Name

Preferred Name, USPS
South Thomaston, ME 04858

Acceptable Alternative
S Thomaston, ME 04858

  • ZIP Code Type: STANDARD
  • County: Knox County
  • Centroid: Latitude 44.04, Longitude -69.147
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 36
  • PO Box Addresses: 257
  • Residential Addresses: 502
    • Multi-Family Addresses: 0
    • Single Family Addresses: 502

The ZIP Code maps and database are updated 4 times per year.
Database updated: July 1, 2023, Maps updated: May 3, 2023.


South Thomaston, ME 04858 Data & Demographics (As of July 1, 2023)


Total Population 1,520 (100%)
Population in Households 1,520 (100.0%)
Population in Families 1,165 (76.6%)
Population in Group Quarters1 0
Population Density 129
Diversity Index2 15


Median Household Income $81,439
Average Household Income $104,869
% of Income for Mortgage4 24%
Per Capita Income $47,950
Wealth Index5 115
Socioeconomic Status Index6 High (69.1)


Total HU (Housing Units) 1,011 (100%)
Owner Occupied HU 610 (60.3%)
Renter Occupied HU 85 ( 8.4%)
Vacant Housing Units 316 (31.3%)
Median Home Value $319,048
Average Home Value $364,590
Housing Affordability Index3 101


Total Households 695
Average Household Size 2.19
Family Households 435
Average Family Size 3.00
  1. Group Quarters - a place where people live or stay in a group living arrangement. Includes college residents halls, nursing facilities, military barracks, and correctional facilities.
  2. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different races or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.
  3. The Housing Affordability Index base is 100 and represents a balance point where a resident with a median household income can normally qualify to purchase a median price home. Values above 100 indicate increased affordability, while values below 100 indicate decreased affordability.
  4. The % of Income for Mortgage quantifies the percentage of median household income dedicated to mortgage payments on a home priced at the median value (assuming a 30-year mortgage and a 20% down payment).
  5. The Wealth Index is based on a number of indicators of affluence including average household income and average net worth, but it also includes the value of material possessions and resources. It represents the wealth of the area relative to the national level. Values above or below 100 represent above-average wealth or below-average wealth compared to the national level.
  6. The Socioeconomic Index ranges from zero (lowest relative status) to 100 (highest relative status). This measure quantifies disparities in social position of an area's inhabitants and is built from a broad range of demographic, housing, and socioeconomic inputs. More information on this measure can be found in Esri's SEI tutorial.


2020-2023 2023-2028
Population 0.00% -0.30%
Households 0.31% 0.03%
Families   -0.14%
Median Household Income   2.03%
Per Capita Income   2.76%
Owner Occupied HU   0.26%

South Thomaston, ME 04858 - Peer Comparisons by Rank and Percentile

The table below compares 04858 to the other 400 ZIP Codes in Maine by rank and percentile using July 1, 2023 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 213 47th
Population Density # 93 77th
Median Household Income # 71 83rd
Housing Affordability Index # 178 45th
Per Capita Income # 87 79th
Diversity Index # 247 38th

Additional comparisons and rankings can be made with a VERY EASY TO USE Maine Census Data Comparison Tool.

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