Galveston is located at 29°17'56" North, 94°47'38" West (29.298889, -94.793889).
According to the United States Census Bureau, the city has a total area of 208.35 mi2 (539.61 km2). 46.15 mi2 (119.53 km2) of it is land and 162.19 mi2 (420.08 km2) of it is covered by water. The total area is 77.85% water.
Galveston is located in the Central Standard Time (CST) timezone, GMT-06:00. It observes Daylight Saving Time (DST).