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/MN/MIDDLE-RIVER

Middle River ZIP code, Minnesota

The ZIP code for Middle River, MN is 56737, and its area code is 218.

USPS city name
1 ZIP code
Population
319
Area code
218

NANPA lists no telephone rate centre for Middle River itself, so these are the area codes of the nearest one, Strathcona (10.5 miles). A town on an area-code boundary can differ from its neighbour.

Middle River in numbers

About 319 people live in Middle River, in 136 households. The median household income is $76,250 a year, 14% below the Minnesota median of $89,062 (US: $80,734). The median owner-occupied home is valued at $101,900 (69% below the Minnesota median), and median gross rent is $408 a month. The median age is 41.1; 15.1% of adults 25 and over hold a bachelor's degree or higher (39.4% across Minnesota); the average commute takes 25 minutes.

Population319Middle River319
Households136Middle River136
Median age41.1Middle River41.1Minnesota38.8US 38.9
Median household income$76,250Middle River$76,250Minnesota$89,062US $80,734
Median home value$101,900Middle River$101,900Minnesota$329,300US $332,700
Median gross rent$408Middle River$408Minnesota$1,280US $1,413
Bachelor's degree or higher15.1%Middle River15.1%Minnesota39.4%US 35.7%
Mean commute24.9 minMiddle River24.9 minMinnesota22.7 minUS 26.4 min
Population density642 / sq miMiddle River642 / sq mi

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

ZIP codes addressed as Middle River

ZIP codes with the USPS city name Middle River
ZIP City Type Population Median income Median home
56737 Middle River , MN Standard 811 $72,679 $139,700

Map of Middle River ZIP codes

56737

The ZIP codes of Middle River, MN, 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 Middle River

The nearest larger towns are Newfolden (332 people, 9.4 mi), Greenbush (678 people, 18 mi) and Karlstad (622 people, 19 mi).

Towns near Middle River
TownPopulationDistance
Thief River Falls 8,823 22.4 mi

More nearby: every ZIP code in Marshall County · Minnesota ZIP codes

Cite this page

zipcodes.pro. “Middle River, MN ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/mn/middle-river

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