Zip Code 17603 — Lancaster, PA

ZIP Code 17603 is associated with Lancaster, PA, in Lancaster County. The listed population estimate is 67,571; estimated density is 870.0 people per square mile. Among records with population estimates, it ranks #1 of 51 in Lancaster County and #2 of 1,811 in PA.
Page generated: 2026-10-08. This is not the source data release date.

📍 View location on OpenStreetMap (40.012700, -76.352870)

Data MetricLocal Statistic
Postal / Zip Code17603
Primary CityLancaster
State / ProvincePA
CountyLancaster
Total Population67,571
Population Density870.0 people/sq mi
TimezoneAmerica/New_York

How 17603 Compares

MetricZIP 17603Lancaster County recordsPA records
Population estimate67,571558,164 (sum)13,018,637 (sum)
Population Density870.0 /sq mi----
County population rank#1 of 51----
State population rank#2 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 17504Bausman1.5 mi105
ZIP 17551Millersville2.6 mi11,753
ZIP 17554Mountville4.3 mi7,453
ZIP 17601Lancaster4.6 mi56,382
ZIP 17582Washington Boro5.3 mi1,702

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 →