New Wilmington
- County:
- Lawrence County
- County Seat:
- No
- Area (mi²):
- 1.054
- State:
- Pennsylvania
New Wilmington is a borough located in Lawrence County, Pennsylvania. New Wilmington has a 2026 population of 2,089. New Wilmington is currently declining at a rate of -0.33% annually and its population has decreased by -0.33% since the most recent census, which recorded a population of 2,096 in 2020.