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/LESTER

Lester ZIP code, Iowa

The ZIP code for Lester, IA is 51242, and its area code is 712.

USPS city name
1 ZIP code
Population
340
Area code
712
State
Iowa

Lester in numbers

About 340 people live in Lester, in 114 households. The median household income is $99,063 a year, 32% above the Iowa median of $75,059 (US: $80,734). The median owner-occupied home is valued at $190,900 (8% below the Iowa median). The median age is 38.8; 17.2% of adults 25 and over hold a bachelor's degree or higher (31.4% across Iowa); the average commute takes 19 minutes.

Population340Lester340
Households114Lester114
Median age38.8Lester38.8Iowa38.6US 38.9
Median household income$99,063Lester$99,063Iowa$75,059US $80,734
Median home value$190,900Lester$190,900Iowa$208,000US $332,700
Bachelor's degree or higher17.2%Lester17.2%Iowa31.4%US 35.7%
Mean commute18.6 minLester18.6 minIowa19.8 minUS 26.4 min
Population density186 / sq miLester186 / sq mi

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

ZIP codes addressed as Lester

ZIP codes with the USPS city name Lester
ZIP City Type Population Median income Median home
51242 Lester , IA Standard 379 $95,625 $190,900

Map of Lester ZIP codes

51242

The ZIP codes of Lester, 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 Lester

The nearest larger towns are Larchwood (1,136 people, 5.4 mi), Hills, MN (748 people, 6.2 mi) and Rock Rapids (2,661 people, 8.3 mi).

Towns near Lester
TownPopulationDistance
Rock Rapids 2,661 8.3 mi
Luverne, MN 4,925 15.9 mi
Canton, SD 3,033 15.9 mi
Brandon, SD 10,996 16.5 mi
Rock Valley 4,059 16.6 mi
Harrisburg, SD 8,519 19.1 mi
Sioux Falls, SD 201,469 21.2 mi
Tea, SD 6,786 24.7 mi
Sioux Center 8,454 26.5 mi
Sibley 2,803 29.6 mi

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

Cite this page

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

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