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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/45504

45504

ZIP 45504 is in Springfield, Ohio, in Clark County; area codes 937 and 326; Eastern time. Springfield has 6 ZIP codes; the others are 45501, 45502, 45503, 45505 and 45506.

Type
Standard
Time zone
America/New_York
County
Clark
Metro area
Springfield, OH
Population
16,363
Coordinates
39.9470, -83.8649
☼ Live from 45504 — Springfield, OH

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Local time: —

Where 45504 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 45504
  • 🔢 Type 45504 into a pocket calculator and turn it upside down: hOSSh — not quite a word, sorry.
  • ➕ As a number, 45,504 = 2 × 2 × 2 × 2 × 2 × 2 × 3 × 3 × 79. Its digits add up to 18, a total 2,332 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1011000111000000
  • 🏠 Its numerical neighbours: 45503 (Springfield, OH, 5 mi away) and 45505 (Springfield, OH, 6 mi away).
  • 🔄 Backwards, 45504 becomes 40554, which is not a ZIP code at all.
  • 👥 17 other ZIP codes are made of exactly the same digits (04455, 04554, 05445, 05454, 05544, 44055, …). The farthest-flung twin is 04455 in Lee, ME, 873 miles away.
  • 🧭 Farther north than 56% of all ZIP codes, and farther east than 60%.
  • 🎯779 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 45504 and you would come out at 39.95°S, 96.14°E — 1,230 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 15h 01m of daylight. Shortest: 9h 20m.
  • 📏 At 22.0 square miles of land, 45504 is bigger than 39% of ZIP codes — room for about 17 Central Parks.
🌙 The sky over 45504 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population16,363This ZIP16,363
Households6,500This ZIP6,500
Housing units7,167This ZIP7,167
Median age40.1This ZIP40.1Ohio39.7US 38.9
Median household income$69,960This ZIP$69,960Ohio$71,389US $80,734
Median home value$180,600This ZIP$180,600Ohio$214,800US $332,700
Median gross rent$944This ZIP$944Ohio$1,034US $1,413
Bachelor's degree or higher27.1%This ZIP27.1%
Mean commute20.3 minThis ZIP20.3 min
Population density745.3 / sq miThis ZIP745.3 / sq mi

Business and tax activity

Business establishments450This ZIP450
Employees10,048This ZIP10,048
Annual payroll$459,860,000This ZIP$459,860,000
Tax returns filed7,700This ZIP7,700
Total adjusted gross income$548,409,000This ZIP$548,409,000

Land area

Land area21.95 sq miThis ZIP21.95 sq mi
Water area0.15 sq miThis ZIP0.15 sq mi

Other place names in 45504

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

ZIP codes near 45504

ZIPCityDistance
45506 Springfield, OH 3.1 mi
45501 Springfield, OH 3.4 mi
45502 Springfield, OH 4.2 mi
45319 Donnelsville, OH 4.7 mi
45372 Tremont City, OH 4.8 mi
45349 North Hampton, OH 5.0 mi
45503 Springfield, OH 5.3 mi
45505 Springfield, OH 6.5 mi
45323 Enon, OH 7.4 mi
45344 New Carlisle, OH 7.7 mi

Find every ZIP code within 10 miles of 45504 →

Questions about this ZIP code

Where is ZIP code 45504?

45504 is in Springfield, Ohio, in Clark County, part of the Springfield, OH metropolitan area. Its published point location is 39.9470, -83.8649.

What county is 45504 in?

45504 lies in Clark County.

What area code is 45504?

Springfield uses area codes 937 and 326, from NANPA's telephone records.

What time zone is 45504 in?

45504 uses America/New_York.

How many people live in 45504?

About 16,363 people live in ZIP code 45504, in 6,500 households, at 745.3 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 45504?

$69,960 a year, against $71,389 across Ohio.

What ZIP codes are near 45504?

The closest are 45506 (3.1 mi), 45501 (3.4 mi), 45502 (4.2 mi), 45319 (4.7 mi) and 45372 (4.8 mi).

Is 45504 a PO Box ZIP code?

45504 is a standard ZIP code. A normal ZIP code with street delivery.

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Cite this page

zipcodes.pro. “45504 ZIP Code — Springfield, Ohio (Clark County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/45504

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