Modesto is located at 37°38'21" North, 120°59'44" West (37.639167, -120.995833).
According to the United States Census Bureau, the city has a total area of 35.96 mi2 (93.14 km2). 35.79 mi2 (92.69 km2) of it is land and 0.17 mi2 (0.45 km2) of it is covered by water. The total area is 0.49% water.
Modesto is located in the Pacific Standard Time (PST) timezone, GMT-08:00. It observes Daylight Saving Time (DST).