ZIP Code 04858 - South Thomaston Maine
Overview
ZIP Code 04858 is located in South Thomaston Maine. Portions of 04858 are also in Thomaston and Thomaston (town) and St. George and Spruce Head. 04858 is entirely within Knox County. Regionally, 04858 is located in the Portland-Auburn Area.
ZIP Code 04858 Quick Stats
| ZIP Code Name | South Thomaston |
| Primary County | Knox County |
| ZIP Code Type | Standard |
| Population (2022) | 1,371 |
| Area Code(s) | 207 |
| Current Time | EDT |
ZIP Code 04858 Map
04858 Demographics
04858 can be classified socioeconomically as Middle Class class compared to other ZIP Codes in Maine based on Median Household Income and Average Adjusted Gross Income. The majority race/ethnicity residing in 04858 is White. The current unemployment level in 04858 is 3.3%.
| Population | 1,371 |
| Population Growth Rate | -5.87% |
| Population Density | 97 People per Square Mile |
| Total Households | 610 |
| Percentage High Income Households | 1.6% |
| Median Household Income (2021) | $76,368 |
| Average Adjusted Gross Income (2021) | $370,180 |
| Current Unemployment Rate (May 2026) | 3.3% |
| Sales Tax Rate (2025) | 5.5% |
| Majority Race/Ethnicity | White - 98.21% |
04858 Race/Ethnicity Breakdown
| Race/Ethnicity | Total | Percentage |
|---|---|---|
| White | 1,318 | 98.21% |
| Black | 0 | 0% |
| Hispanic | 19 | 1.42% |
| Asian | 0 | 0% |
| Native American | 5 | 0.37% |
| Hawaiian/Pac. Islander | 0 | 0% |
04858 Educational Attainment Levels
| Highest Education Level | Total | Percentage |
|---|---|---|
| Less Than 1 Year of College | 44 | 4.37% |
| Bachelor Degree | 189 | 18.79% |
| High School Diploma | 363 | 36.08% |
| No High School Diploma | 0 | 0% |
| GED or Alternate | 89 | 8.85% |
| 1 or More Years of College | 158 | 15.71% |
| Associates Degree | 69 | 6.86% |
| Masters Degree | 72 | 7.16% |
| Professional Degree | 15 | 1.49% |
| Doctorate Degree | 7 | 0.7% |
04858 Geography
| Coordinates | 44.04886627, -69.14887238 |
| Adjacent ZIP Codes | |
| Cities/Towns in 04858 | |
| Region | Portland-Auburn Area |
| Time Zone | Eastern Daylight Time |
| IANA Timezone | America/New_York |
| Area | 14 Square Miles |
04858 Schools
| School Districts in 04858 |
04858 Weather and Climate Data
| Plant Hardiness Zone | Zone 6a: -10F to -5F | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average First Frost Date | October 1 - 10 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Average Last Frost Date | May 1 - 10 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Koppen-Geiger Climate Zone | Dfb - Humid Continental Mild Summer, Wet All Year | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Ecoregion | 82f - Midcoast | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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