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/MONROE

Monroe ZIP code, Ohio

The ZIP code for Monroe, OH is 45050, and its area code is 513.

USPS city name
1 ZIP code
Overlapping the city
3 more
Population
15,401
Area code
513
State
Ohio

Mail addressed to Monroe uses the ZIP code above. 3 more ZIP codes cover part of the city but are addressed as somewhere else; they are listed separately below.

Monroe in numbers

About 15,401 people live in Monroe, in 5,259 households. The median household income is $105,250 a year, 47% above the Ohio median of $71,389 (US: $80,734). The median owner-occupied home is valued at $282,400 (31% above the Ohio median), and median gross rent is $1,608 a month. The median age is 36.5; 39.4% of adults 25 and over hold a bachelor's degree or higher (31.5% across Ohio); the average commute takes 23 minutes.

Population15,401Monroe15,401
Households5,259Monroe5,259
Median age36.5Monroe36.5Ohio39.7US 38.9
Median household income$105,250Monroe$105,250Ohio$71,389US $80,734
Median home value$282,400Monroe$282,400Ohio$214,800US $332,700
Median gross rent$1,608Monroe$1,608Ohio$1,034US $1,413
Bachelor's degree or higher39.4%Monroe39.4%Ohio31.5%US 35.7%
Mean commute23.1 minMonroe23.1 minOhio23.4 minUS 26.4 min
Population density976 / sq miMonroe976 / sq mi

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

ZIP codes addressed as Monroe

ZIP codes with the USPS city name Monroe
ZIP City Type Population Median income Median home
45050 Monroe , OH Standard 12,248 $104,282 $293,100

Other ZIP codes overlapping Monroe

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

ZIP codes overlapping Monroe
ZIP City Type Population Median income Median home
45011 Hamilton , OH Standard 75,864 $91,873 $293,800
45036 Lebanon , OH Standard 42,204 $99,128 $352,200
45044 Middletown , OH Standard 56,217 $73,732 $241,600

Map of Monroe ZIP codes

45050

The ZIP codes of Monroe, 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 Monroe

The nearest larger towns are Middletown (51,617 people, 3.9 mi), Mason (35,509 people, 7.0 mi) and Lebanon (21,501 people, 8.0 mi).

Towns near Monroe
TownPopulationDistance
Middletown 51,617 3.9 mi
Four Bridges 3,417 4.6 mi
Hunter 3,551 5.4 mi
Trenton 13,583 5.8 mi
Mason 35,509 7.0 mi
Beckett Ridge 9,496 8.0 mi
Lebanon 21,501 8.0 mi
Franklin 11,712 8.4 mi
Carlisle 5,543 9.5 mi
South Lebanon 6,712 9.6 mi
Landen 7,499 10.1 mi
Springboro 19,980 10.7 mi
Hamilton 63,468 11.2 mi
Sharonville 14,030 11.6 mi

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

Cite this page

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

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