Winnetka is a village in Cook County, Illinois, United States, located 16 miles (26 km) north of downtown Chicago. The population was 12,475 as of the 2020 census. The village is one of the wealthiest places in the United States in terms of household income. It was the second-ranked Illinois community on Bloomberg's 2019 Richest Places Annual Index.

The North Shore consists of many affluent suburbs north of Chicago, Illinois, bordering the shores of Lake Michigan. These communities fall within suburban Cook County and Lake County. The North Shore's membership is often a topic of debate, and it includes some Chicago suburbs which do not border Lake Michigan. However, Lake Bluff, Lake Forest, Highwood, Highland Park, Deerfield, Glencoe, Northbrook, Northfield, Winnetka, Kenilworth, Wilmette, Golf, Glenview, Niles, Morton Grove, Skokie, and Evanston, are generally considered to be the main constituents of the North Shore. The North Shore is known for its affluence, high level of education, proximity to Chicago, and top-rated public schools.