The West Side is one of the three major geographical "sides" of the city of Chicago, Illinois, United States. The others are the North Side and South Side. The West Side contains communities that are of historical and cultural importance to the history and development of Chicago. On the flag of Chicago, the West Side is represented by the central white stripe.
The West Side has gone through many transitions in its ethnic and socioeconomic makeup due to its historic role as a gateway for immigrants and migrants as well as its role for funneling poorer African-American residents away from the wealthier lakeside neighborhoods and central business district. Historically the Great Chicago Fire of 1871 started on the West Side before consuming much of the then city, and Jane Addams of Hull House brought international attention to the West Side in the late 1900s and early 20th century. At the same time, some of Chicago's grandest parks and boulevards were laid out on the West Side. Today, the West Side consists of large mixed communities of middle class, working class, and low-income African American, Puerto Rican, and Mexican residents; some small communities of blue-collar, lower middle class and middle class white residents of historically Polish, Italian, Czech, Russian Jewish, and Greek, descent; and newer communities of middle-class, upper-middle class, and wealthy white residents created by gentrification. Major shifts continue to happen due to forces such as rapid gentrification, selective corporate investments, and unequal distribution of city resources.