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/IA/PORTSMOUTH

Portsmouth ZIP code, Iowa

The ZIP code for Portsmouth, IA is 51565, and its area code is 712.

USPS city name
1 ZIP code
Population
204
Area code
712
State
Iowa

Portsmouth in numbers

About 204 people live in Portsmouth, in 103 households. The median household income is $80,781 a year, 8% above the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $125,000 (40% below the Iowa median), and median gross rent is $769 a month. The median age is 47.3; 10.4% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 23 minutes.

Population204Portsmouth204
Households103Portsmouth103
Median age47.3Portsmouth47.3Iowa38.6US 38.9
Median household income$80,781Portsmouth$80,781Iowa$75,059US $80,734
Median home value$125,000Portsmouth$125,000Iowa$208,000US $332,700
Median gross rent$769Portsmouth$769Iowa$972US $1,413
Bachelor's degree or higher10.4%Portsmouth10.4%Iowa31.4%US 35.7%
Mean commute22.8 minPortsmouth22.8 minIowa19.8 minUS 26.4 min
Population density664 / sq miPortsmouth664 / sq mi

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

ZIP codes addressed as Portsmouth

ZIP codes with the USPS city name Portsmouth
ZIP City Type Population Median income Median home
51565 Portsmouth , IA Standard 516 $103,257 $182,100

Map of Portsmouth ZIP codes

51565

The ZIP codes of Portsmouth, IA, 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 Portsmouth

The nearest larger towns are Persia (294 people, 5.6 mi), Panama (245 people, 5.7 mi) and Harlan (4,891 people, 9.9 mi).

Towns near Portsmouth
TownPopulationDistance
Harlan 4,891 9.9 mi
Missouri Valley 2,666 20.8 mi
Denison 8,260 26.7 mi

More nearby: every ZIP code in Shelby County · Iowa ZIP codes

Cite this page

zipcodes.pro. “Portsmouth, IA ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/city/ia/portsmouth

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