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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/04978

04978

ZIP 04978 is Smithfield, Maine, in Somerset County; area code 207; Eastern time.

Type
Standard
Time zone
America/New_York
County
Somerset
Metro area
none
Population
856
Coordinates
44.6418, -69.7999
☼ Live from 04978 — Smithfield, ME

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Local time: —

Where 04978 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 04978
  • 🔢 Type 04978 into a pocket calculator and turn it upside down: BLGhO — not quite a word, sorry.
  • ➕ As a number, 4,978 = 2 × 19 × 131. Its digits add up to 28, a total 1,520 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1001101110010
  • 🏠 Its numerical neighbours: 04976 (Skowhegan, ME, 12 mi away) and 04979 (Solon, ME, 21 mi away).
  • 🔄 Backwards, 04978 becomes 87940 — and that is a real ZIP code: Rincon, NM, 2,149 miles away.
  • 👥 43 other ZIP codes are made of exactly the same digits (04987, 07849, 09847, 09874, 47809, 47980, …). The farthest-flung twin is 09874 in APO AA, a military post office, 6,199 miles away.
  • 🧭 Farther north than 90% of all ZIP codes, and farther east than 97%.
  • 🎯1,501 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 04978 and you would come out at 44.64°S, 110.20°E — 928 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 34m of daylight. Shortest: 8h 48m.
  • 📏 At 19.9 square miles of land, 04978 is bigger than 37% of ZIP codes — room for about 15 Central Parks.
🌙 The sky over 04978 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population856This ZIP856
Households413This ZIP413
Housing units683This ZIP683
Median age55.8This ZIP55.8Maine44.8US 38.9
Median household income$107,917This ZIP$107,917Maine$74,733US $80,734
Median home value$242,800This ZIP$242,800Maine$296,600US $332,700
Median gross rent$1,109This ZIP$1,109Maine$1,139US $1,413
Bachelor's degree or higher34.7%This ZIP34.7%
Mean commute32.5 minThis ZIP32.5 min
Population density43.0 / sq miThis ZIP43.0 / sq mi

Business and tax activity

Business establishments19This ZIP19
Employees188This ZIP188
Annual payroll$9,643,000This ZIP$9,643,000
Tax returns filed510This ZIP510
Total adjusted gross income$38,349,000This ZIP$38,349,000

Land area

Land area19.90 sq miThis ZIP19.90 sq mi
Water area4.86 sq miThis ZIP4.86 sq mi

ZIP codes near 04978

ZIPCityDistance
04963 Oakland, ME 5.6 mi
04957 Norridgewock, ME 5.9 mi
04937 Fairfield, ME 6.8 mi
04918 Belgrade Lakes, ME 7.1 mi
04903 Waterville, ME 7.7 mi
04944 Hinckley, ME 8.3 mi
04955 New Sharon, ME 9.5 mi
04975 Shawmut, ME 10.5 mi
04917 Belgrade, ME 10.8 mi
04360 Vienna, ME 11.5 mi

Find every ZIP code within 10 miles of 04978 →

Questions about this ZIP code

Where is ZIP code 04978?

04978 is in Smithfield, Maine, in Somerset County. Its published point location is 44.6418, -69.7999.

What county is 04978 in?

04978 lies in Somerset County.

What area code is 04978?

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

What time zone is 04978 in?

04978 uses America/New_York.

How many people live in 04978?

About 856 people live in ZIP code 04978, in 413 households, at 43.0 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 04978?

$107,917 a year, against $74,733 across Maine.

What ZIP codes are near 04978?

The closest are 04963 (5.6 mi), 04957 (5.9 mi), 04937 (6.8 mi), 04918 (7.1 mi) and 04903 (7.7 mi).

Is 04978 a PO Box ZIP code?

04978 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “04978 ZIP Code — Smithfield, Maine (Somerset County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/04978

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