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/WATERLOO

Waterloo ZIP code, Ohio

The ZIP code for Waterloo, OH is 45688, and its area code is 740.

USPS city name
1 ZIP code
Population
210
Area code
740
State
Ohio

NANPA lists no telephone rate centre for Waterloo itself, so these are the area codes of the nearest one, Oak Hill (10.4 miles). A town on an area-code boundary can differ from its neighbour.

Waterloo in numbers

About 210 people live in Waterloo, in 77 households. The median owner-occupied home is valued at $52,700 (75% below the Ohio median).

Population210Waterloo210
Households77Waterloo77
Median home value$52,700Waterloo$52,700Ohio$214,800US $332,700

U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, for the ZIP code addressed as Waterloo. Survey estimates carry margins of error, wider for small places. Sources and methods.

ZIP codes addressed as Waterloo

ZIP codes with the USPS city name Waterloo
ZIP City Type Population Median income Median home
45688 Waterloo , OH Standard 210 — $52,700

Map of Waterloo ZIP codes

45688

The ZIP codes of Waterloo, 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 Waterloo

The nearest larger towns are Oak Hill (1,545 people, 12 mi), South Webster (873 people, 12 mi) and Rio Grande (739 people, 14 mi).

Towns near Waterloo
TownPopulationDistance
Ironton 10,768 15.5 mi
Wheelersburg 6,313 16.3 mi
Russell, KY 3,676 17.2 mi
Flatwoods, KY 7,269 17.2 mi
Westwood, KY 4,473 18.9 mi
Ashland, KY 21,295 19.6 mi
Gallipolis 3,130 19.9 mi
South Point 3,099 21.4 mi
Portsmouth 17,728 21.9 mi
Burlington 2,807 22.1 mi
Jackson 6,231 22.3 mi
Kenova, WV 2,944 22.8 mi
Huntington, WV 45,787 22.9 mi
Point Pleasant, WV 3,961 23.6 mi

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

Cite this page

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

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