Marysvale is located at 38°26'57" North, 112°13'45" West (38.449167, -112.229444).
According to the United States Census Bureau, the town has a total area of 15.11 mi2 (39.15 km2). 15.10 mi2 (39.11 km2) of it is land and 0.01 mi2 (0.04 km2) of it is covered by water. The total area is 0.09% water.
Marysvale is located in the Mountain Standard Time (MST) timezone, GMT-07:00. It observes Daylight Saving Time (DST).