Lakehills is located at 29°35'50" North, 98°56'47" West (29.597381, -98.946606).
According to the United States Census Bureau, the city has a total area of 34.37 mi2 (89.03 km2). 30.29 mi2 (78.46 km2) of it is land and 4.08 mi2 (10.57 km2) of it is covered by water. The total area is 11.87% water.
Lakehills is located in the Central Standard Time (CST) timezone, GMT-06:00. It observes Daylight Saving Time (DST).