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Zip Code 51242 — Lester, IA

51242 is a ZIP Code associated with Lester, IA, located within Lyon. 51242 ranks #8 out of 8 ZIP codes in Lyon County by population (and #745 out of 970 in IA). The area supports an estimated population of 379 residents across Data Pending housing units, with a population density of 26.9 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (43.432270, -96.338060)

Data MetricLocal Statistic
Postal / Zip Code51242
Primary CityLester
State / ProvinceIA
CountyLyon
Total Population379
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density26.9 people/sq mi
TimezoneAmerica/Chicago

How 51242 Compares

MetricZIP 51242Lyon CountyIA State Average
Population37912,262 (Total)3,210,984 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density26.9 /sq mi----
County Pop Rank#8 of 8----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 51230Alvord5.3 mi478N/A
Zip 51241Larchwood6.2 mi2,103N/A
Zip 51246Rock Rapids8.7 mi4,041N/A
Zip 51240Inwood10.4 mi1,914N/A
Zip 51235Doon11.3 mi1,007N/A

Data Sources & Methodology: Geographic coordinates and ZIP Code assignments are derived from underlying geographic and postal datasets. Note that ZIP Codes are USPS postal delivery areas, while Census ZCTAs are statistical approximation areas. Read full methodology →