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/HARLAN

Harlan ZIP codes, Iowa

Harlan, IA has 2 ZIP codes (51537 and 51593) and area code 712. The largest is 51537.

USPS city name
2 ZIP codes
Population
4,891
Area code
712
State
Iowa

Harlan in numbers

About 4,891 people live in Harlan, in 2,017 households. The median household income is $57,488 a year, 23% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $152,500 (27% below the Iowa median), and median gross rent is $783 a month. The median age is 44.6; 22.1% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 14 minutes.

Population4,891Harlan4,891
Households2,017Harlan2,017
Median age44.6Harlan44.6Iowa38.6US 38.9
Median household income$57,488Harlan$57,488Iowa$75,059US $80,734
Median home value$152,500Harlan$152,500Iowa$208,000US $332,700
Median gross rent$783Harlan$783Iowa$972US $1,413
Bachelor's degree or higher22.1%Harlan22.1%Iowa31.4%US 35.7%
Mean commute13.7 minHarlan13.7 minIowa19.8 minUS 26.4 min
Population density1,107 / sq miHarlan1,107 / sq mi

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

ZIP codes addressed as Harlan

ZIP codes with the USPS city name Harlan
ZIP City Type Population Median income Median home
51537 Harlan , IA Standard 6,382 $65,000 $166,800
51593 Harlan , IA No street area — — —

Map of Harlan ZIP codes

5153751593

The ZIP codes of Harlan, 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 Harlan

The nearest larger towns are Atlantic (6,763 people, 24 mi), Denison (8,260 people, 25 mi) and Carroll (10,208 people, 38 mi).

Towns near Harlan
TownPopulationDistance
Atlantic 6,763 23.7 mi
Denison 8,260 25.3 mi

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

Cite this page

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

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