New Smithville is an unincorporated community in Weisenberg Township in Lehigh County, Pennsylvania, United States. It is located west of the city of Allentown and near the border with Berks County. It is part of the Lehigh Valley, which has a population of 861,899 and is the 68th-most populous metropolitan area in the U.S. as of the 2020 census.

New Smithville, Pennsylvania
Unincorporated community
New Smithville Location of New Smithville in Pennsylvania Show map of Pennsylvania New Smithville New Smithville (the United States) Show map of the United States
Coordinates: 40°34′47″N 75°43′42″W / 40.57972°N 75.72833°W / 40.57972; -75.72833
Country	United States
State	Pennsylvania
County	Lehigh
Township	Weisenberg
Elevation	169 m (554 ft)
Population
• Metro	865,310 (US: 68th)
Time zone	UTC-5 (Eastern (EST))
• Summer (DST)	UTC-4 (EDT)
ZIP Codes	18031, 19530
Area code(s)	610 and 484
GNIS feature ID	1204280[1]

It is located at the intersection of Pennsylvania Route 863 and Interstate 78/U.S. Route 22. It is split between the Breinigsville ZIP code of 18031 and the Kutztown ZIP code of 19530. It is in the Schuylkill watershed and is drained via the Mill Creek and Sacony Creek into the Maiden Creek. The New Smithville telephone exchange uses area code 610.