Harleigh is a census-designated place in Hazle Township, Luzerne County, Pennsylvania, United States, north of the city of Hazleton. The CDP population was 1,104 at the 2010 census.Harleigh is located at 40°59′0″N 75°58′20″W / 40.98333°N 75.97222°W / 40.98333; -75.97222.According to the United States Census Bureau, the CDP has a total area of 0.58 square miles, 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.