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Zip Code 66543 — Vassar, KS

66543 is a ZIP Code associated with Vassar, KS, located within Osage. The postal region supports an estimated population of 980 residents across Data Pending housing units, with a population density of 42.7 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (38.641750, -95.600290)

Data MetricLocal Statistic
Postal / Zip Code66543
Primary CityVassar
State / ProvinceKS
CountyOsage
Total Population980
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density42.7 people/sq mi
TimezoneAmerica/Chicago

How 66543 Compares

MetricZIP 66543Osage CountyKS State Average
Population98016,0662,947,026
Median IncomeData PendingN/AN/A
Population Density42.7 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 66451Lyndon4.5 mi1,671N/A
Zip 66528Quenemo4.7 mi761N/A
Zip 66076Pomona8.7 mi2,416N/A
Zip 66537Scranton10.0 mi1,475N/A
Zip 66510Melvern10.3 mi684N/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 →