Mountain Top is located at 41°10'14" North, 75°52'35" West (41.170833, -75.876389).
According to the United States Census Bureau, the city has a total area of 69.01 mi2 (178.74 km2). 68.17 mi2 (176.56 km2) of it is land and 0.84 mi2 (2.19 km2) of it is covered by water. The total area is 1.22% water.
Mountain Top is located in the Eastern Standard Time (EST) timezone, GMT-05:00. It observes Daylight Saving Time (DST).