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/60303

60303

ZIP 60303 is in Oak Park, Illinois, in Cook County; area code 708; Central time. Oak Park has 4 ZIP codes; the others are 60301, 60302 and 60304.

Type
No street area
Time zone
America/Chicago
County
Cook
Coordinates
41.8850, -87.7845

The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

This ZIP code has no Census tabulation area of its own. Its point falls inside ZCTA 60302, whose figures describe that area — not this ZIP code.

☼ Live from 60303 — Oak Park, IL

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Where 60303 is

This ZIP code has no Census tabulation area, so there is no boundary to draw — the marker is its published point location.

★ Weird and wonderful facts about 60303
  • 🔢 Type 60303 into a pocket calculator and turn it upside down: EOEOg — not quite a word, sorry.
  • ➕ As a number, 60,303 = 3 × 20101. Its digits add up to 12, a total 940 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1110101110001111
  • 🏠 Its numerical neighbours: 60302 (Oak Park, IL, 1 mi away) and 60304 (Oak Park, IL, 1 mi away).
  • 🔄 Backwards, 60303 becomes 30306 — and that is a real ZIP code: Atlanta, GA, 590 miles away.
  • 👥 16 other ZIP codes are made of exactly the same digits (03036, 03063, 03603, 06033, 06330, 30036, …). The farthest-flung twin is 33060 in Pompano Beach, FL, 1,166 miles away.
  • 🧭 Farther north than 74% of all ZIP codes, and farther west than 50%.
  • 🎯581 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 60303 and you would come out at 41.88°S, 92.22°E — 1,176 miles from Port-aux-Français, French Southern Territories, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 14m of daylight. Shortest: 9h 07m.
🌙 The sky over 60303 today
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🌋 Shake report
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Source: USGS.

Business and tax activity

Business establishments7This ZIP7
Employees20This ZIP20
Annual payroll$1,645,000This ZIP$1,645,000

Land area

ZIP codes near 60303

ZIPCityDistance
60301 Oak Park, IL 0.7 mi
60302 Oak Park, IL 0.7 mi
60304 Oak Park, IL 0.9 mi
60644 Chicago, IL 1.5 mi
60305 River Forest, IL 1.9 mi
60130 Forest Park, IL 2.1 mi
60651 Chicago, IL 2.5 mi
60707 Elmwood Park, IL 2.8 mi
60639 Chicago, IL 2.9 mi
60153 Maywood, IL 3.1 mi

Find every ZIP code within 10 miles of 60303 →

Questions about this ZIP code

Where is ZIP code 60303?

60303 is in Oak Park, Illinois, in Cook County, part of the Chicago-Naperville-Elgin, IL-IN metropolitan area. Its published point location is 41.8850, -87.7845.

What county is 60303 in?

60303 lies in Cook County.

What area code is 60303?

Oak Park uses area code 708, from NANPA's telephone records.

What time zone is 60303 in?

60303 uses America/Chicago.

What ZIP codes are near 60303?

The closest are 60301 (0.7 mi), 60302 (0.7 mi), 60304 (0.9 mi), 60644 (1.5 mi) and 60305 (1.9 mi).

Is 60303 a PO Box ZIP code?

Possibly. The Census map gives this ZIP code no delivery area of its own, which usually means it serves post office boxes, a single organization or a post office rather than streets of homes.

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Cite this page

zipcodes.pro. “60303 ZIP Code — Oak Park, Illinois (Cook County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/60303

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