Roanoke is located at 37°16'14" North, 79°56'29" West (37.270556, -79.941389).
According to the United States Census Bureau, the city has a total area of 42.91 mi2 (111.14 km2). 42.88 mi2 (111.07 km2) of it is land and 0.03 mi2 (0.07 km2) of it is covered by water. The total area is 0.06% water.
Roanoke is located in the Eastern Standard Time (EST) timezone, GMT-05:00. It observes Daylight Saving Time (DST).