Neighborhoods
Chicago is partitioned into four main sections: Downtown (which contains the Loop), the North Side, the South Side, and the West Side. In the late 1920s sociologists at the University of Chicago subdivided the city into 77 distinct community areas. The boundaries of these areas are more clearly defined than those of the over 210 neighborhoods throughout the city, allowing for better year-by-year comparisons.
 
Downtown and The Loop
Main article: Chicago Loop
The downtown area, lying somewhat roughly between Division Street on the north, Lake Michigan on the east, Roosevelt Road on the south and DesPlaines Avenue on the west, serves as the city's commercial hub. The area known as The Loop, is a portion of downtown named for it once having been located within a circuit of cable cars. Today the name reflects the elevated train Loop, which connects — either directly or indirectly — to every line in the CTA rapid transit system. Some of downtown's commercial, cultural, and financial institutions are located in the Loop.
 
North Side
The city's North Side (extending north of downtown along the lakefront) is the most densely populated residential section of the city. It contains public parkland and beaches stretching for miles along Lake Michigan to the city's northern border. Much of the North Side has benefited from an economic boom which began in the 1990s. For example, the River North area, located just north of the Chicago River and the Loop, has undergone a transition from a warehouse district to an active commercial, residential, and entertainment hub, featuring the city's largest concentration of contemporary art galleries. Just west of River North's galleries and bistros, demolition of the CHA's Cabrini-Green housing project began in 2003, being replaced by upscale townhomes.19
 
South Side
The South Side (extending south of downtown along Lake Michigan) is the largest section of the city, encompassing roughly 60% of the city's land area. The section along the lake is marked with public parkland and beaches. The South Side has a higher ratio of single-family homes and also contains most of the city's industry.
 
Along with being the largest section of the city in terms of geography, the South Side is also home to two of the city's largest parades: the annual Bud Billiken Day parade, which is held during the second weekend of August and celebrates children returning to school, and the South Side Irish Parade, which is always held the Sunday prior to Saint Patrick's Day, unless the holiday falls on a Sunday in which case the parade is held that day.
 
The South Side has two of Chicago's largest public parks. Jackson Park, which hosted the World's Columbian Exposition in 1893, is currently the site of the Museum of Science and Industry. The park stretches along the lakefront, linking the neighborhoods of Hyde Park and South Shore. Washington Park, which is connected to Jackson Park by the Midway Plaisance, is currently being considered as the primary site of the Olympic Stadium for the 2016 Summer Olympics if Chicago wins the bid.
 
West Side
The West Side (extending west of downtown) is made up of neighborhoods such as Austin, Lawndale, Garfield Park, West Town, and Humboldt Park among others. Some neighborhoods, particularly Garfield Park and Lawndale, have socio-economic problems including urban decay and crime. Other West Side neighborhoods, especially those closer to downtown, have been experiencing a rise in property value.
 
Major parks on the West Side include Douglas Park, Garfield Park, and Humboldt Park. Garfield Park Conservatory houses one of the largest collections of tropical plants of any U.S. city. Cultural attractions on the West Side include Humboldt Park's Puerto Rican Day festival, and the National Museum of Mexican Art in Pilsen.