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/45121

45121

ZIP 45121 is Georgetown, Ohio, mostly in Brown County; area codes 937 and 326; Eastern time.

Type
Standard
Time zone
America/New_York
County
Brown +1 more
Population
9,030
Coordinates
38.8669, -83.9083
☼ Live from 45121 — Georgetown, OH

Weather right now

Asking the National Weather Service…

NEXRAD radar
Finding the nearest radar…
Local time: —

Where 45121 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 45121
  • 🔢 Type 45121 into a pocket calculator and turn it upside down: IZISh — not quite a word, sorry.
  • ➕ 45121 is a prime number. It cannot be divided by anything except 1 and itself. Its digits add up to 13, a total 1,179 other ZIP codes share.
  • 💾In binary, the way a computer stores it: 1011000001000001
  • 🏠 Its numerical neighbours: 45120 (Felicity, OH, 10 mi away) and 45122 (Goshen, OH, 27 mi away).
  • 🔄 Backwards, 45121 becomes 12154 — and that is a real ZIP code: Schaghticoke, NY, 607 miles away.
  • 👥 33 other ZIP codes are made of exactly the same digits (11245, 11425, 11542, 12154, 12451, 12514, …). The farthest-flung twin is 51241 in Larchwood, IA, 725 miles away.
  • 🧭 Farther south than 52% of all ZIP codes, and farther east than 60%.
  • 🎯786 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
  • 🌏 Dig straight through the Earth from 45121 and you would come out at 38.87°S, 96.09°E — 1,208 miles from Perth, Australia, the nearest big city to that spot.
  • ☀Longest day of the year: 14h 54m of daylight. Shortest: 9h 26m.
  • 📏 At 106.8 square miles of land, 45121 is bigger than 79% of ZIP codes — room for about 81 Central Parks.
🌙 The sky over 45121 today
  • Working out the sun…
🌋 Shake report
  • Checking the USGS…

Source: USGS.

People and housing

Population9,030This ZIP9,030
Households3,687This ZIP3,687
Housing units4,044This ZIP4,044
Median age43.2This ZIP43.2Ohio39.7US 38.9
Median household income$60,188This ZIP$60,188Ohio$71,389US $80,734
Median home value$164,600This ZIP$164,600Ohio$214,800US $332,700
Median gross rent$700This ZIP$700Ohio$1,034US $1,413
Bachelor's degree or higher18.4%This ZIP18.4%
Mean commute34.4 minThis ZIP34.4 min
Population density84.5 / sq miThis ZIP84.5 / sq mi

Business and tax activity

Business establishments146This ZIP146
Employees1,794This ZIP1,794
Annual payroll$75,891,000This ZIP$75,891,000
Tax returns filed3,800This ZIP3,800
Total adjusted gross income$225,383,000This ZIP$225,383,000

Land area

Land area106.82 sq miThis ZIP106.82 sq mi
Water area1.62 sq miThis ZIP1.62 sq mi

Counties 45121 spans

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

CountyShare of this ZIP
Brown County 95.7%
Clermont County 4.3%

Other place names in 45121

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

ZIP codes near 45121

ZIPCityDistance
45119 Feesburg, OH 5.0 mi
45130 Hamersville, OH 5.7 mi
45131 Higginsport, OH 6.2 mi
45168 Russellville, OH 7.5 mi
45167 Ripley, OH 8.7 mi
41002 Augusta, KY 9.3 mi
45106 Bethel, OH 10.0 mi
45120 Felicity, OH 10.1 mi
41062 Minerva, KY 11.2 mi
45115 Decatur, OH 11.6 mi

Find every ZIP code within 10 miles of 45121 →

Questions about this ZIP code

Where is ZIP code 45121?

45121 is in Georgetown, Ohio, in Brown County, part of the Cincinnati, OH-KY-IN metropolitan area. Its published point location is 38.8669, -83.9083.

What county is 45121 in?

45121 spans 2 counties: Brown County and Clermont County. Most of it falls in Brown County, 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 45121?

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

What time zone is 45121 in?

45121 uses America/New_York.

How many people live in 45121?

About 9,030 people live in ZIP code 45121, in 3,687 households, at 84.5 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 45121?

$60,188 a year, against $71,389 across Ohio.

What ZIP codes are near 45121?

The closest are 45119 (5 mi), 45130 (5.7 mi), 45131 (6.2 mi), 45168 (7.5 mi) and 45167 (8.7 mi).

Is 45121 a PO Box ZIP code?

45121 is a standard ZIP code. A normal ZIP code with street delivery.

Download or cite

Cite this page

zipcodes.pro. “45121 ZIP Code — Georgetown, Ohio (Brown County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/45121

Machine-readable version of these facts:

curl https://zipcodes.pro/zip/45121.json

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