About 18331 - Gilbert, Pennsylvania
Located in Pennsylvania, the United States is home to the small community of Gilbert, served by ZIP code 18331. It sits within Gilbert County County.
Gilbert has a reported population of 3,624. That's below the Pennsylvania average of about 22,902 people per ZIP code.
Median household income is about $85,400 (above the Pennsylvania average).
This ZIP code sits alongside neighboring areas like New Castle, Philadelphia, Clearfield within Pennsylvania.