Deerfield is a north shore suburb of Chicago in Lake County, Illinois, United States, approximately 25 miles north of Chicago with a small portion extending into Cook County, Illinois. The population was 19,196 at the 2020 census. Deerfield is home to the headquarters of Walgreens Boots Alliance, Baxter Healthcare, Caterpillar Inc., and Fortune Brands Home & Security. Deerfield is often listed among some of the wealthiest and highest earning places in Illinois and the Midwest. The per capita income of the village is $68,101 and the median household income is $143,729.