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Zip Code 17821 — Danville, PA

17821 is a ZIP Code associated with Danville, PA, located within Montour. The postal region supports an estimated population of 18,613 residents across Data Pending housing units, with a population density of 53.5 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (40.991700, -76.639590)

Data MetricLocal Statistic
Postal / Zip Code17821
Primary CityDanville
State / ProvincePA
CountyMontour
Total Population18,613
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density53.5 people/sq mi
TimezoneAmerica/New_York

How 17821 Compares

MetricZIP 17821Montour CountyPA State Average
Population18,61321,58013,018,637
Median IncomeData PendingN/AN/A
Population Density53.5 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 17822Danville2.5 mi11N/A
Zip 17868Riverside2.6 mi719N/A
Zip 17884Washingtonville4.6 mi263N/A
Zip 17865Potts Grove7.8 mi24N/A
Zip 17857Northumberland8.0 mi7,671N/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 →