Every ZIP code in the United States, with weather, radar, trivia and the numbers behind it. Five digits since 1963!

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/01373

01373

ZIP 01373 is South Deerfield, Massachusetts, in Franklin County; area code 413; Eastern time.

Type
Standard
Time zone
America/New_York
County
Franklin
Metro area
Greenfield, MA
Population
4,860
Coordinates
42.4755, -72.6154
☼ Live from 01373 — South Deerfield, MA

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 01373 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 01373
  • 🔢 Type 01373 into a pocket calculator and turn it upside down: ELEIO — not quite a word, sorry.
  • ➕ 01373 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 14, a total 1,416 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 10101011101
  • 🏠 Its numerical neighbours: 01370 (Shelburne Falls, MA, 10 mi away) and 01375 (Sunderland, MA, 4 mi away).
  • 🔄 Backwards, 01373 becomes 37310 — and that is a real ZIP code: Charleston, TN, 819 miles away.
  • 👥 33 other ZIP codes are made of exactly the same digits (01337, 13037, 13073, 13730, 17033, 17303, …). The farthest-flung twin is 73301 in Austin, TX, 1,622 miles away.
  • 🧭 Farther north than 79% of all ZIP codes, and farther east than 94%.
  • 🎯1,358 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 01373 and you would come out at 42.48°S, 107.38°E — 863 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 18m of daylight. Shortest: 9h 04m.
  • 📏 At 23.1 square miles of land, 01373 is bigger than 40% of ZIP codes — room for about 18 Central Parks.
🌙 The sky over 01373 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population4,860This ZIP4,860
Households2,342This ZIP2,342
Housing units2,397This ZIP2,397
Median age53.3This ZIP53.3Massachusetts40.0US 38.9
Median household income$106,413This ZIP$106,413Massachusetts$103,960US $80,734
Median home value$413,500This ZIP$413,500Massachusetts$562,100US $332,700
Median gross rent$1,224This ZIP$1,224Massachusetts$1,762US $1,413
Bachelor's degree or higher37.7%This ZIP37.7%
Mean commute17.8 minThis ZIP17.8 min
Population density210.7 / sq miThis ZIP210.7 / sq mi

Business and tax activity

Business establishments148This ZIP148
Employees3,151This ZIP3,151
Annual payroll$147,785,000This ZIP$147,785,000
Tax returns filed2,540This ZIP2,540
Total adjusted gross income$231,009,000This ZIP$231,009,000

Land area

Land area23.07 sq miThis ZIP23.07 sq mi
Water area0.54 sq miThis ZIP0.54 sq mi

Other place names in 01373

Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.

ZIP codes near 01373

ZIPCityDistance
01093 Whately, MA 2.6 mi
01302 Greenfield, MA 3.3 mi
01375 Sunderland, MA 3.6 mi
01066 North Hatfield, MA 4.3 mi
01342 Deerfield, MA 4.7 mi
01341 Conway, MA 4.9 mi
01039 Haydenville, MA 5.9 mi
01059 North Amherst, MA 6.2 mi
01351 Montague, MA 6.5 mi
01088 West Hatfield, MA 6.5 mi

Find every ZIP code within 10 miles of 01373 →

Questions about this ZIP code

Where is ZIP code 01373?

01373 is in South Deerfield, Massachusetts, in Franklin County, part of the Greenfield, MA micropolitan area. Its published point location is 42.4755, -72.6154.

What county is 01373 in?

01373 lies in Franklin County.

What area code is 01373?

South Deerfield uses area code 413, from NANPA's telephone records.

What time zone is 01373 in?

01373 uses America/New_York.

How many people live in 01373?

About 4,860 people live in ZIP code 01373, in 2,342 households, at 210.7 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 01373?

$106,413 a year, against $103,960 across Massachusetts.

What ZIP codes are near 01373?

The closest are 01093 (2.6 mi), 01302 (3.3 mi), 01375 (3.6 mi), 01066 (4.3 mi) and 01342 (4.7 mi).

Is 01373 a PO Box ZIP code?

01373 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “01373 ZIP Code — South Deerfield, Massachusetts (Franklin County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/01373

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/01373.json

Underlying data is public domain or openly licensed — sources, vintages and licences.