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ZIP stands for Zone Improvement Plan. The codes went live on July 1, 1963.The lowest ZIP code is 00501 — the IRS in Holtsville, New York.The highest ZIP code is 99950, in Ketchikan, Alaska.Type 07734 into a calculator and turn it upside down: hELLO. It is Keansburg, New Jersey.12345 belongs to one company: General Electric in Schenectady, New York.The first digit is a region: 0 is New England and New Jersey, 9 is the West Coast, Alaska and Hawaii.Mr. ZIP, the cartoon mailman, was the mascot that sold the idea to America.ZIP+4 arrived in 1983 and can narrow a ZIP down to one side of one block.A ZIP code is a mail route, not a place: plenty of them cross county and even state lines.Play ZIP Hunt: guess the secret ZIP code of the day in six tries.
zipcodes.pro — ZIP/04858

04858

ZIP 04858 is South Thomaston, Maine, in Knox County; area code 207; Eastern time.

Type
Standard
Time zone
America/New_York
County
Knox
Metro area
none
Population
1,378
Coordinates
44.0465, -69.1541
☼ Live from 04858 — South Thomaston, ME

Weather right now

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Local time: —

Where 04858 is

Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.

★ Weird and wonderful facts about 04858
  • 🔢 Type 04858 into a pocket calculator and turn it upside down: BSBhO — not quite a word, sorry.
  • ➕ As a number, 4,858 = 2 × 7 × 347. Its digits add up to 25, a total 2,242 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1001011111010
  • 🏠 Its numerical neighbours: 04856 (Rockport, ME, 9 mi away) and 04859 (Spruce Head, ME, 3 mi away).
  • 🔄 Backwards, 04858 becomes 85840, which is not a ZIP code at all.
  • 👥 20 other ZIP codes are made of exactly the same digits (05488, 05848, 08854, 40588, 40858, 45808, …). The farthest-flung twin is 85048 in Phoenix, AZ, 2,399 miles away.
  • 🧭 Farther north than 87% of all ZIP codes, and farther east than 97%.
  • 🎯1,532 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 04858 and you would come out at 44.05°S, 110.85°E — 879 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 30m of daylight. Shortest: 8h 53m.
  • 📏 At 11.4 square miles of land, 04858 is bigger than 29% of ZIP codes — room for about 8.7 Central Parks.
🌙 The sky over 04858 today
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🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population1,378This ZIP1,378
Households608This ZIP608
Housing units809This ZIP809
Median age54.1This ZIP54.1Maine44.8US 38.9
Median household income$87,059This ZIP$87,059Maine$74,733US $80,734
Median home value$341,300This ZIP$341,300Maine$296,600US $332,700
Median gross rent$925This ZIP$925Maine$1,139US $1,413
Bachelor's degree or higher44.4%This ZIP44.4%
Mean commute15.7 minThis ZIP15.7 min
Population density120.7 / sq miThis ZIP120.7 / sq mi

Business and tax activity

Business establishments41This ZIP41
Employees167This ZIP167
Annual payroll$6,635,000This ZIP$6,635,000
Tax returns filed800This ZIP800
Total adjusted gross income$52,643,000This ZIP$52,643,000

Land area

Land area11.42 sq miThis ZIP11.42 sq mi
Water area3.23 sq miThis ZIP3.23 sq mi

ZIP codes near 04858

ZIPCityDistance
04854 Owls Head, ME 3.1 mi
04859 Spruce Head, ME 3.5 mi
04861 Thomaston, ME 4.3 mi
04563 Cushing, ME 5.7 mi
04841 Rockland, ME 6.1 mi
04864 Warren, ME 7.2 mi
04860 Tenants Harbor, ME 8.3 mi
04856 Rockport, ME 9.4 mi
04547 Friendship, ME 10.0 mi
04865 West Rockport, ME 10.2 mi

Find every ZIP code within 10 miles of 04858 →

Questions about this ZIP code

Where is ZIP code 04858?

04858 is in South Thomaston, Maine, in Knox County. Its published point location is 44.0465, -69.1541.

What county is 04858 in?

04858 lies in Knox County.

What area code is 04858?

South Thomaston uses area code 207, from NANPA's telephone records.

What time zone is 04858 in?

04858 uses America/New_York.

How many people live in 04858?

About 1,378 people live in ZIP code 04858, in 608 households, at 120.7 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.

What is the median household income in 04858?

$87,059 a year, against $74,733 across Maine.

What ZIP codes are near 04858?

The closest are 04854 (3.1 mi), 04859 (3.5 mi), 04861 (4.3 mi), 04563 (5.7 mi) and 04841 (6.1 mi).

Is 04858 a PO Box ZIP code?

04858 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “04858 ZIP Code — South Thomaston, Maine (Knox County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/04858

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