Lancaster is located at 34°41'52" North, 118°8'8" West (34.697778, -118.135833).
According to the United States Census Bureau, the city has a total area of 94.18 mi2 (243.92 km2). 94.00 mi2 (243.46 km2) of it is land and 0.18 mi2 (0.46 km2) of it is covered by water. The total area is 0.19% water.
Lancaster is located in the Pacific Standard Time (PST) timezone, GMT-08:00. It observes Daylight Saving Time (DST).