ZipCrawl

NOTE: Gray indicates insufficient data or a suppressed estimate.

The vast majority of Pennsylvania zip codes report U.S. citizenship rates above 95% among the adult population, with near-universal citizenship across the rural central and northern tiers of the state. Notable exceptions cluster in the Philadelphia metropolitan area in the southeast corner, where several zip codes drop below 80%, and to a lesser extent around the Pittsburgh area in the southwest, reflecting higher concentrations of immigrant populations in the state's two largest urban centers. A scattered band of moderately lower citizenship rates (85–93%) also appears across the south-central region, likely corresponding to agricultural communities and smaller cities such as Reading, Lancaster, and the Lehigh Valley.

Data: U.S. Census Bureau, 2023 ACS