Summerfield is located at 36°12'29" North, 79°54'16" West (36.208333, -79.904722).
According to the United States Census Bureau, the town has a total area of 27.28 mi2 (70.65 km2). 27.11 mi2 (70.22 km2) of it is land and 0.17 mi2 (0.43 km2) of it is covered by water. The total area is 0.61% water.
Summerfield is located in the Eastern Standard Time (EST) timezone, GMT-05:00. It observes Daylight Saving Time (DST).