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 — CITY/OH/FAIRFIELD

Fairfield ZIP codes, Ohio

Fairfield, OH has 2 ZIP codes: 45014 and 45018. The largest is 45014.

USPS city name
2 ZIP codes
Overlapping the city
2 more
Population
44,828
State
Ohio

Mail addressed to Fairfield uses the ZIP codes above. 2 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Fairfield in numbers

About 44,828 people live in Fairfield, in 18,428 households, the 25th-largest of Ohio's 1,264 census places. The median household income is $77,937 a year, 9% above the Ohio median of $71,389 (US: $80,734). The median owner-occupied home is valued at $234,500 (9% above the Ohio median), and median gross rent is $1,242 a month. The median age is 38.1; 30.7% of adults 25 and over hold a bachelor's degree or higher (31.5% across Ohio); the average commute takes 24 minutes.

Population44,828Fairfield44,828
Households18,428Fairfield18,428
Median age38.1Fairfield38.1Ohio39.7US 38.9
Median household income$77,937Fairfield$77,937Ohio$71,389US $80,734
Median home value$234,500Fairfield$234,500Ohio$214,800US $332,700
Median gross rent$1,242Fairfield$1,242Ohio$1,034US $1,413
Bachelor's degree or higher30.7%Fairfield30.7%Ohio31.5%US 35.7%
Mean commute23.8 minFairfield23.8 minOhio23.4 minUS 26.4 min
Population density2,152 / sq miFairfield2,152 / sq mi

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the census place Fairfield city. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Fairfield

ZIP codes with the USPS city name Fairfield
ZIP City Type Population Median income Median home
45014 Fairfield , OH Standard 45,773 $75,661 $232,400
45018 Fairfield , OH No street area — — —

Other ZIP codes overlapping Fairfield

These ZIP codes cover part of Fairfield but are addressed as somewhere else.

ZIP codes overlapping Fairfield
ZIP City Type Population Median income Median home
45011 Hamilton , OH Standard 75,864 $91,873 $293,800
45240 Cincinnati , OH Standard 29,600 $71,947 $203,700

Map of Fairfield ZIP codes

4501445018

The ZIP codes of Fairfield, OH, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.

Towns near Fairfield

The nearest larger towns are Hamilton (63,468 people, 4.5 mi), Cincinnati (311,224 people, 13 mi) and Middletown (51,617 people, 15 mi).

Towns near Fairfield
TownPopulationDistance
Pleasant Run Farm 4,524 2.1 mi
Pleasant Run 5,629 3.2 mi
Forest Park 20,025 3.2 mi
Mount Healthy Heights 3,263 4.4 mi
Hamilton 63,468 4.5 mi
Springdale 11,033 4.6 mi
New Burlington 5,426 4.6 mi
Greenhills 3,702 4.6 mi
Beckett Ridge 9,496 5.7 mi
Northgate 6,723 6.0 mi
Northbrook 10,742 6.2 mi
Ross 2,601 6.4 mi
Woodlawn 3,894 6.5 mi
Mount Healthy 6,919 6.8 mi

More nearby: every ZIP code in Butler County · Ohio ZIP codes

Cite this page

zipcodes.pro. “Fairfield, OH ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/oh/fairfield

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