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/33503

33503

ZIP 33503 is Balm, Florida, in Hillsborough County; area codes 813 and 656; Eastern time.

Type
Standard
Time zone
America/New_York
County
Hillsborough
Population
891
Coordinates
27.7638, -82.2762
☼ Live from 33503 — Balm, FL

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 33503 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 33503
  • 🔢 Type 33503 into a pocket calculator and turn it upside down: EOSEE — not quite a word, sorry.
  • ➕ 33503 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: 1000001011011111
  • 🏠 Its numerical neighbours: 33499 (Boca Raton, FL, 166 mi away) and 33508 (Brandon, FL, 12 mi away).
  • 🔄 Backwards, 33503 becomes 30533 — and that is a real ZIP code: Dahlonega, GA, 481 miles away.
  • 👥 8 other ZIP codes are made of exactly the same digits (30353, 30533, 33035, 33305, 33530, 35033, …). The farthest-flung twin is 50333 in Des Moines, IA, 1,153 miles away.
  • 🧭 Farther south than 97% of all ZIP codes, and farther east than 66%.
  • 🎯1,250 miles southeast of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 33503 and you would come out at 27.76°S, 97.72°E — 1,080 miles from West Island, Cocos Islands, the nearest big city to that spot.
  • ☀Longest day of the year: 13h 54m of daylight. Shortest: 10h 23m.
  • 📏 At 0.609 square miles of land, 33503 is bigger than 6% of ZIP codes — about 295 football fields.
🌙 The sky over 33503 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population891This ZIP891
Households184This ZIP184
Housing units184This ZIP184
Median age37.6This ZIP37.6Florida42.6US 38.9
Median household income$138,553This ZIP$138,553Florida$74,568US $80,734
Median home value$352,900This ZIP$352,900Florida$359,000US $332,700
Bachelor's degree or higher2.1%This ZIP2.1%
Population density1,463.1 / sq miThis ZIP1,463.1 / sq mi

Business and tax activity

Business establishments7This ZIP7
Employees20This ZIP20
Annual payroll$1,302,000This ZIP$1,302,000

Land area

Land area0.61 sq miThis ZIP0.61 sq mi
Water area0.00 sq miThis ZIP0.00 sq mi

Other place names in 33503

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

ZIP codes near 33503

ZIPCityDistance
33579 Riverview, FL 2.4 mi
33598 Wimauma, FL 4.9 mi
33569 Riverview, FL 6.0 mi
33573 Sun City Center, FL 6.0 mi
33534 Gibsonton, FL 7.0 mi
33572 Apollo Beach, FL 7.6 mi
33578 Riverview, FL 8.3 mi
33547 Lithia, FL 8.8 mi
33596 Valrico, FL 9.1 mi
33575 Ruskin, FL 10.0 mi

Find every ZIP code within 10 miles of 33503 →

Questions about this ZIP code

Where is ZIP code 33503?

33503 is in Balm, Florida, in Hillsborough County, part of the Tampa-St. Petersburg-Clearwater, FL metropolitan area. Its published point location is 27.7638, -82.2762.

What county is 33503 in?

33503 lies in Hillsborough County.

What area code is 33503?

Balm uses area codes 813 and 656, from NANPA's telephone records.

What time zone is 33503 in?

33503 uses America/New_York.

How many people live in 33503?

About 891 people live in ZIP code 33503, in 184 households, at 1,463.1 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 33503?

$138,553 a year, against $74,568 across Florida.

What ZIP codes are near 33503?

The closest are 33579 (2.4 mi), 33598 (4.9 mi), 33569 (6 mi), 33573 (6 mi) and 33534 (7 mi).

Is 33503 a PO Box ZIP code?

33503 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “33503 ZIP Code — Balm, Florida (Hillsborough County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/33503

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/33503.json

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