Hosensack is an unincorporated community in Lower Milford Township, Lehigh County, Pennsylvania. The Hosensack Creek flows southwest through the village into the Perkiomen Creek in Palm. Zionsville is two miles to the north and Hosensack residents use its zip code of 18092 except for a very small number on Mill Hill who use the East Greenville zip code of 18041.  It is in the Pennsburg telephone exchange and uses area code 215.
During the mid-1730s the Kings Highway was surveyed and settlement began in the Hosensack Valley. A group of German travelers compelled to spend a night in the valley remarked "es war so dunkel wie in einem Hosensack" (it was as dark as in a pants pocket.) The original name of the village was Buckhorn and it was founded in 1759. 
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