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/OLIN

Olin ZIP code, Iowa

The ZIP code for Olin, IA is 52320, and its area code is 319.

USPS city name
1 ZIP code
Population
830
Area code
319
State
Iowa

Olin in numbers

About 830 people live in Olin, in 287 households. The median household income is $51,932 a year, 31% below the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $108,500 (48% below the Iowa median), and median gross rent is $788 a month. The median age is 32.6; 7.4% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 38 minutes.

Population830Olin830
Households287Olin287
Median age32.6Olin32.6Iowa38.6US 38.9
Median household income$51,932Olin$51,932Iowa$75,059US $80,734
Median home value$108,500Olin$108,500Iowa$208,000US $332,700
Median gross rent$788Olin$788Iowa$972US $1,413
Bachelor's degree or higher7.4%Olin7.4%Iowa31.4%US 35.7%
Mean commute38.2 minOlin38.2 minIowa19.8 minUS 26.4 min
Population density812 / sq miOlin812 / sq mi

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

ZIP codes addressed as Olin

ZIP codes with the USPS city name Olin
ZIP City Type Population Median income Median home
52320 Olin , IA Standard 1,425 $62,222 $131,300

Map of Olin ZIP codes

52320

The ZIP codes of Olin, 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 Olin

The nearest larger towns are Mechanicsville (964 people, 8.6 mi), Clarence (1,166 people, 8.8 mi) and Anamosa (5,629 people, 10 mi).

Towns near Olin
TownPopulationDistance
Anamosa 5,629 10.3 mi
Mount Vernon 4,513 15.5 mi
Tipton 3,106 15.7 mi
Monticello 4,071 16.3 mi
Solon 3,152 22.6 mi
Marion 41,896 23.1 mi
Maquoketa 6,075 24.9 mi
West Branch 2,594 25.2 mi
Cedar Rapids 137,264 27.7 mi
Robins 3,332 27.9 mi
Hiawatha 7,206 28.5 mi
Wilton 2,920 28.8 mi
North Liberty 21,125 29.9 mi
West Liberty 3,776 30.0 mi

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

Cite this page

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

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