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/00739

00739

ZIP 00739 is Cidra, Puerto Rico, in Cidra Municipio; area codes 787 and 939; Atlantic time.

Type
Standard
Time zone
America/Puerto_Rico
County
Cidra
Population
34,578
Coordinates
18.1755, -66.1621
☼ Live from 00739 — Cidra, PR

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 00739 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 00739
  • 🔢 Type 00739 into a pocket calculator and turn it upside down: GELOO — not quite a word, sorry.
  • ➕ 00739 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 19, a total 2,454 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1011100011
  • 🏠 Its numerical neighbours: 00738 (Fajardo, PR, 32 mi away) and 00740 (Puerto Real, PR, 36 mi away).
  • 🔄 Backwards, 00739 becomes 93700, which is not a ZIP code at all.
  • 👥 26 other ZIP codes are made of exactly the same digits (00937, 03079, 03907, 07039, 07093, 07930, …). The farthest-flung twin is 09073 in APO AE, a military post office, 4,641 miles away.
  • 🧭 Farther south than 99% of all ZIP codes, and farther east than 98%.
  • 🎯2,442 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 00739 and you would come out at 18.18°S, 113.84°E — 665 miles from Denpasar, Indonesia, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 13m of daylight. Shortest: 11h 02m.
  • 📏 At 30.8 square miles of land, 00739 is bigger than 46% of ZIP codes — room for about 23 Central Parks.
🌙 The sky over 00739 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population34,578This ZIP34,578
Households13,007This ZIP13,007
Housing units14,949This ZIP14,949
Median age43.5This ZIP43.5Puerto Rico44.8US 38.9
Median household income$29,463This ZIP$29,463Puerto Rico$26,297US $80,734
Median home value$154,100This ZIP$154,100Puerto Rico$131,500US $332,700
Median gross rent$555This ZIP$555Puerto Rico$578US $1,413
Bachelor's degree or higher27.6%This ZIP27.6%
Mean commute27.7 minThis ZIP27.7 min
Population density1,123.6 / sq miThis ZIP1,123.6 / sq mi

Land area

Land area30.77 sq miThis ZIP30.77 sq mi
Water area0.43 sq miThis ZIP0.43 sq mi

Other place names in 00739

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

ZIP codes near 00739

ZIPCityDistance
00737 Cayey, PR 4.4 mi
00736 Cayey, PR 5.0 mi
00786 La Plata, PR 5.2 mi
00782 Comerio, PR 5.3 mi
00703 Aguas Buenas, PR 5.4 mi
00727 Caguas, PR 6.3 mi
00705 Aibonito, PR 7.6 mi
00726 Caguas, PR 8.5 mi
00725 Caguas, PR 8.6 mi
00794 Barranquitas, PR 9.8 mi

Find every ZIP code within 10 miles of 00739 →

Questions about this ZIP code

Where is ZIP code 00739?

00739 is in Cidra, Puerto Rico, in Cidra Municipio, part of the San Juan-Bayamón-Caguas, PR metropolitan area. Its published point location is 18.1755, -66.1621.

What county is 00739 in?

00739 lies in Cidra Municipio.

What area code is 00739?

Cidra uses area codes 787 and 939, from NANPA's telephone records.

What time zone is 00739 in?

00739 uses America/Puerto_Rico.

How many people live in 00739?

About 34,578 people live in ZIP code 00739, in 13,007 households, at 1,123.6 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 00739?

$29,463 a year, against $26,297 across Puerto Rico.

What ZIP codes are near 00739?

The closest are 00737 (4.4 mi), 00736 (5 mi), 00786 (5.2 mi), 00782 (5.3 mi) and 00703 (5.4 mi).

Is 00739 a PO Box ZIP code?

00739 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “00739 ZIP Code — Cidra, Puerto Rico (Cidra Municipio).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/00739

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/00739.json

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