Dekalb is located in Dekalb County, IL. The population is 44,778, making Dekalb the largest city in Dekalb County.
There are 10 public schools in Dekalb with an average Homefacts rating of B-. The total crime rate for Dekalb is moderate, and there are 46 registered sex offenders residing in the city. Unemployment in Dekalb is moderate and the median home sales price is $107,500.