|• Total||0.6 sq mi (1.5 km2)|
|• Land||0.6 sq mi (1.5 km2)|
|• Water||0 sq mi (0 km2)|
|• Density||1,900/sq mi (740/km2)|
|Time zone||Eastern (EST) (UTC-5)|
|• Summer (DST)||EDT (UTC-4)|
|Area code(s)||570 and 272|
Harleigh is located at .
According to the United States Census Bureau, the CDP has a total area of 0.58 square miles (1.5 km2), all of it land. Harleigh is located less than one mile north of the city of Hazleton, along Pennsylvania Route 940, an east-west road. The western terminus of Route 940 is located just west of Harleigh at Pennsylvania Route 309, a north-south highway connecting Hazleton to the south with Mountain Top and Wilkes-Barre to the north.
- "Profile of General Population and Housing Characteristics: 2010 Demographic Profile Data (DP-1): Harleigh CDP, Pennsylvania". U.S. Census Bureau, American Factfinder. Retrieved April 20, 2012.
- "US Gazetteer files: 2010, 2000, and 1990". United States Census Bureau. 2011-02-12. Retrieved 2011-04-23.