Riverwoods is a village in Lake County, Illinois, United States. It was established on the banks of the Des Plaines River in 1959 by local steel magnate Jay Peterson. Per the 2020 census, the population was 3,790. The corporate headquarters of Discover Financial and CCH are located there, as well as Orphans of the Storm, an animal shelter founded in 1928 by famous dancer Irene Castle. The village used to host the annual "Arts & Riverwoods" festival.

Lake County is situated in the northeastern corner of the U.S. state of Illinois, along the shores of Lake Michigan. As of the 2020 census, it has a population of 714,342, making it the third-most populous county in Illinois. Its county seat is Waukegan, the tenth-largest city in Illinois. The county is primarily suburban, with some urban areas and some rural areas. Due to its location, immediately north of Cook County, Lake County is one of the collar counties of the Chicago metropolitan area. Its northern boundary is the Wisconsin state line.