Leetsdale is located at 40°33'47" North, 80°12'29" West (40.563056, -80.208333).
According to the United States Census Bureau, the borough has a total area of 1.15 mi2 (2.98 km2). 0.99 mi2 (2.56 km2) of it is land and 0.16 mi2 (0.42 km2) of it is covered by water. The total area is 14.18% water.
Leetsdale is located in the Eastern Standard Time (EST) timezone, GMT-05:00. It observes Daylight Saving Time (DST).