St Jacob is located in Illinois. St Jacob, Illinois has a population of 1,538. St Jacob is more family-centric than the surrounding county with 60.56% of the households containing married families with children. The county average for households married with children is 30.51%.
The median household income in St Jacob, Illinois is $89,571. The median household income for the surrounding county is $66,882 compared to the national median of $69,021. The median age of people living in St Jacob is 33.2 years.
The average high temperature in July is 89.2 degrees, with an average low temperature in January of 21.9 degrees. The average rainfall is approximately 43.6 inches per year, with 11.5 inches of snow per year.
