Home > PA > Columbia County > Mifflinville > Zip 18631

Zip Code 18631 — Mifflinville, PA

18631 is a ZIP Code associated with Mifflinville, PA, located within Columbia. The postal region supports an estimated population of 1,100 residents across Data Pending housing units, with a population density of 298.6 people per square mile.
WorldPlaceData database updated: October 2026

📍 View location on OpenStreetMap (41.030790, -76.302330)

Data MetricLocal Statistic
Postal / Zip Code18631
Primary CityMifflinville
State / ProvincePA
CountyColumbia
Total Population1,100
Median Household IncomeData Pending
Total Housing UnitsData Pending
Population Density298.6 people/sq mi
TimezoneAmerica/New_York

How 18631 Compares

MetricZIP 18631Columbia CountyPA State Average
Population1,10072,58013,018,637
Median IncomeData PendingN/AN/A
Population Density298.6 /sq mi----

Nearby ZIP Codes

ZIP CodeCityDistancePopulationMedian Income
Zip 18603Berwick4.8 mi18,827N/A
Zip 18635Nescopeck5.0 mi3,734N/A
Zip 17815Bloomsburg6.7 mi29,790N/A
Zip 18246Rock Glen7.6 mi84N/A
Zip 17859Orangeville7.7 mi2,701N/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 →