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/00637

00637

ZIP 00637 is Sabana Grande, Puerto Rico, mostly in Sabana Grande Municipio; area code 787; Atlantic time.

Type
Standard
Time zone
America/Puerto_Rico
County
Sabana Grande +2 more
Metro area
Mayagüez, PR
Population
22,909
Coordinates
18.0801, -66.9480
☼ Live from 00637 — Sabana Grande, PR

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 00637 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 00637
  • 🔢 Type 00637 into a pocket calculator and turn it upside down: LEgOO — not quite a word, sorry.
  • ➕ As a number, 637 = 7 × 7 × 13. Its digits add up to 16, a total 1,922 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1001111101
  • 🏠 Its numerical neighbours: 00636 (Rosario, PR, 10 mi away) and 00638 (Ciales, PR, 32 mi away).
  • 🔄 Backwards, 00637 becomes 73600, which is not a ZIP code at all.
  • 👥 27 other ZIP codes are made of exactly the same digits (00736, 03076, 03607, 06037, 06073, 06370, …). The farthest-flung twin is 67003 in Anthony, KS, 2,297 miles away.
  • 🧭 Farther south than 99% of all ZIP codes, and farther east than 98%.
  • 🎯2,410 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 00637 and you would come out at 18.08°S, 113.05°E — 668 miles from Denpasar, Indonesia, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 13m of daylight. Shortest: 11h 03m.
  • 📏 At 35.2 square miles of land, 00637 is bigger than 50% of ZIP codes — room for about 27 Central Parks.
🌙 The sky over 00637 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population22,909This ZIP22,909
Households8,236This ZIP8,236
Housing units11,601This ZIP11,601
Median age45.6This ZIP45.6Puerto Rico44.8US 38.9
Median household income$21,987This ZIP$21,987Puerto Rico$26,297US $80,734
Median home value$100,200This ZIP$100,200Puerto Rico$131,500US $332,700
Median gross rent$465This ZIP$465Puerto Rico$578US $1,413
Bachelor's degree or higher28.4%This ZIP28.4%
Mean commute27.1 minThis ZIP27.1 min
Population density651.5 / sq miThis ZIP651.5 / sq mi

Land area

Land area35.16 sq miThis ZIP35.16 sq mi
Water area0.01 sq miThis ZIP0.01 sq mi

Counties 00637 spans

A ZIP code is a mail route and ignores county lines. Shares are by overlapping land area.

CountyShare of this ZIP
Sabana Grande Municipio 94.0%
San Germán Municipio 4.2%
Lajas Municipio 1.8%

Other place names in 00637

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

ZIP codes near 00637

ZIPCityDistance
00606 Maricao, PR 5.5 mi
00683 San German, PR 6.2 mi
00698 Yauco, PR 6.4 mi
00653 Guanica, PR 7.0 mi
00667 Lajas, PR 7.8 mi
00647 Ensenada, PR 8.0 mi
00636 Rosario, PR 10.4 mi
00631 Castaner, PR 10.5 mi
00656 Guayanilla, PR 10.8 mi
00670 Las Marias, PR 10.9 mi

Find every ZIP code within 10 miles of 00637 →

Questions about this ZIP code

Where is ZIP code 00637?

00637 is in Sabana Grande, Puerto Rico, in Sabana Grande Municipio, part of the Mayagüez, PR metropolitan area. Its published point location is 18.0801, -66.9480.

What county is 00637 in?

00637 spans 3 counties: Sabana Grande Municipio, San Germán Municipio and Lajas Municipio. Most of it falls in Sabana Grande Municipio, measured by overlapping land area — the county holding the most land in a ZIP code is not always the one holding the most residents.

What area code is 00637?

Sabana Grande uses area code 787, from NANPA's telephone records.

What time zone is 00637 in?

00637 uses America/Puerto_Rico.

How many people live in 00637?

About 22,909 people live in ZIP code 00637, in 8,236 households, at 651.5 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 00637?

$21,987 a year, against $26,297 across Puerto Rico.

What ZIP codes are near 00637?

The closest are 00606 (5.5 mi), 00683 (6.2 mi), 00698 (6.4 mi), 00653 (7 mi) and 00667 (7.8 mi).

Is 00637 a PO Box ZIP code?

00637 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “00637 ZIP Code — Sabana Grande, Puerto Rico (Sabana Grande Municipio).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/00637

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/00637.json

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