St. jacob is located in Madison county Illinois with a geographic area of 0.8 square miles. The total population in St. jacob is 1,529 with 46.4% male and 53.6% female. Children under age 5 represent 10.5% of the population, under age 18 equal 34.4% of the population and over age 65 is 9.2% of the population. The median household income is $83,750, per capita income is $30,732. There are a total of 530 housing units with 86.2% owner occupied. Education includes 17.4% of residents that are high school graduates and 35.8% with a bachelor's degree or higher. The average temperature in St. jacob in the summer is 74 degrees, and in the winter 27 degrees.
