Dekalb is located in Illinois. Dekalb, Illinois has a population of 43,196. Dekalb is less family-centric than the surrounding county with 25% households with children. The county percentage for households with children is 29%.
The median household income in Dekalb, Illinois is $49,389. The median household income for the surrounding county is $64,842 compared to the national median of $66,222. The median age of people living in Dekalb is 24.5 years.
The average high temperature in July is 83.6 degrees, with an average low temperature in January of 10.3 degrees. The annual precipitation is 37.38.