Zip Code 18421 — Forest City, PA

ZIP Code 18421 is associated with Forest City, PA, in Susquehanna County. The listed population estimate is 4,603; estimated density is 47.7 people per square mile. Among records with population estimates, it ranks #3 of 26 in Susquehanna County and #661 of 1,811 in PA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (41.663370, -75.469100)

Data MetricLocal Statistic
Postal / Zip Code18421
Primary CityForest City
State / ProvincePA
CountySusquehanna
Total Population4,603
Population Density47.7 people/sq mi
TimezoneAmerica/New_York

How 18421 Compares

MetricZIP 18421Susquehanna County recordsPA records
Population estimate4,60344,079 (sum)13,018,637 (sum)
Population Density47.7 /sq mi----
County population rank#3 of 26----
State population rank#661 of 1,811----

Regional sums combine the population estimates in the listed ZIP records; they are not official county or state population totals.

Explore More ZIP Codes

Nearby ZIP Codes in PA

ZIP CodeCityDistancePopulation estimate
ZIP 18413Clifford3.5 mi81
ZIP 18407Carbondale5.4 mi14,445
ZIP 18430Herrick Center5.5 mi57
ZIP 18470Union Dale5.8 mi2,139
ZIP 18472Waymart6.3 mi6,601

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 →