'Mount Gretna' definitions:

Mount Gretna, PA -- U.S. borough in Pennsylvania

From: Gazetteer 2000
Name :
Mount Gretna, PA -- U.S. borough in Pennsylvania
Population (2000) :
242
Housing Units (2000) :
205
Land area (2000) :
0.155374 sq. miles (0.402418 sq. km)
Water area (2000) :
0.000000 sq. miles (0.000000 sq. km)
Total area (2000) :
0.155374 sq. miles (0.402418 sq. km)
FIPS code :
51568
Located within :
Pennsylvania (PA), FIPS 42
Location :
40.246525 N, 76.472899 W
Note :
some ZIP codes may be omitted esp. for suburbs.