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Zip Code 66780 — Walnut, KS

66780 is a ZIP Code associated with Walnut, KS, located within Crawford. 66780 ranks #9 out of 13 ZIP codes in Crawford County by population (and #406 out of 704 in KS). The area supports an estimated population of 674 residents across Data Pending housing units, with a population density of 2.5 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (37.608950, -95.058810)

Data MetricLocal Statistic
Postal / Zip Code66780
Primary CityWalnut
State / ProvinceKS
CountyCrawford
Total Population674
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density2.5 people/sq mi
TimezoneAmerica/Chicago

How 66780 Compares

MetricZIP 66780Crawford CountyKS State Average
Population67439,692 (Total)2,947,026 (Total)
Average ZIP IncomeData PendingN/AN/A
Population Density2.5 /sq mi----
County Pop Rank#9 of 13----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 66746Hepler7.2 mi247N/A
Zip 66775Stark8.0 mi224N/A
Zip 66771Saint Paul9.5 mi1,074N/A
Zip 66733Erie10.7 mi2,012N/A
Zip 66743Girard11.8 mi4,313N/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 →