City of St. Jacob, Illinois

St. Jacob is located at 38°43'0" North, 89°46'1" West (38.716897, -89.767122).

According to the United States Census Bureau, the city has a total area of 0.56 mi² (1.45 km²). 0.56 mi² (1.45 km²) of it is land and none of the area is covered by water.

St. Jacob is located in the Central Standard Time (CST) timezone, GMT-06:00. It observes Daylight Saving Time (DST).