Charleston is located at 32°46'35" North, 79°55'51" West (32.776389, -79.931111).
According to the United States Census Bureau, the city has a total area of 114.10 mi2 (295.52 km2). 96.99 mi2 (251.21 km2) of it is land and 17.11 mi2 (44.31 km2) of it is covered by water. The total area is 14.99% water.
Charleston is located in the Eastern Standard Time (EST) timezone, GMT-05:00. It observes Daylight Saving Time (DST).