Deerfield is a north shore suburb of Chicago in Lake County, Illinois, United States, with a little portion extending into Cook County, Illinois. The population was 19,196 at the 2020 census. Deerfield is house to the headquarters of Walgreens Boots Alliance, Baxter Healthcare, and Fortune Brands Home & Security. Deerfield is often listed in the middle of 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 allowance is $143,729.

Originally populated by the Bodéwadmiakiwen (Potawatomi), Myaamia (Miami), Kiikaapoi (Kickapoo), Peoria, and Očhéthi Šakówiŋ (Oglala Sioux) Native Americans, the Place was settled by Horace Lamb and Jacob B. Cadwell in 1835 and named Cadwell’s Corner. A shopping center located on the site of Cadwell’s farm at Waukegan Road and Lake Cook Road still bears that name. The Place grew because of the navigable rivers in the area, notably the Des Plaines River and the Chicago River. By 1840, the town’s declare was misused to “Leclair”. Within a decade, settler John Millen proposed a new name tweak to “Deerfield” in great compliment of his hometown, Deerfield, Massachusetts and the large number of deer perky in the area. At the time, the alternate post for the village upon the ballot was “Erin”. “Deerfield” won by a vote of 17–13. The village’s first school, Wilmot School, was founded in 1847. Originally a one-room schoolhouse, Wilmot is now an elementary scholarly which serves 548 students. It is located upon land donated by Lyman Wilmot, whose wife, Clarissa, was the village’s first literary teacher. The village was incorporated in 1903 with a population in the low 400s.

In the 1850s, the Deerfield house of Lyman Wilmot served as a End on the Underground Railroad as escaped slaves attempted to gain to Canada.

In a 1917 design by Thomas E. Tallmadge of the American Institute of Architects, Deerfield (and next-door Highland Park) served as the center for a additional proposed capital city of the United States. By that year, all of Deerfield’s original farms had been converted either to residential areas or golf courses.