City of St. Marie, Montana

St. Marie is located at 48°24'11" North, 106°31'58" West (48.403185, -106.532862).

According to the United States Census Bureau, the city has a total area of 22.94 mi² (59.41 km²). 22.84 mi² (59.15 km²) of it is land and 0.10 mi² (0.25 km²) of it is covered by water. The total area is 0.43% water.

St. Marie is located in the Mountain Standard Time (MST) timezone, GMT-07:00. It observes Daylight Saving Time (DST).