Saint Jacob is located in Illinois. Saint Jacob, Illinois has a population of 2,609. Saint Jacob is more family-centric than the surrounding county with 40% households with children. The county percentage for households with children is 28%.
The median household income in Saint Jacob, Illinois is $89,914. The median household income for the surrounding county is $63,321 compared to the national median of $66,222. The median age of people living in Saint Jacob is 41.8 years.
The average high temperature in July is 89.07 degrees, with an average low temperature in January of 21.17 degrees. The annual precipitation is 39.19.