Deerfield is a village in Lake and Cook counties in the U.S. state of Illinois. A northern suburb of Chicago, Deerfield is located on the North Shore, about 28 miles north of downtown Chicago. The population was 19,196 at the 2020 census. Deerfield is home to the headquarters of Walgreens Boots Alliance, Baxter Healthcare, and Fortune Brands Home& Security. Deerfield is often listed among the wealthiest and highest-earning places in Illinois and the Midwest.