Humboldt Park, one of 77 designated community areas, is on the West Side of Chicago, Illinois. The Humboldt Park neighborhood is known for its dynamic social and ethnic demographic change over the years. The Puerto Rican community has identified strongly with the area since the 1970s. Humboldt Park is also the alternative name of Alexander Von Park, a 207-acre (0.8 km2) park adjacent to the community area. Boundaries and subsections The official community boundaries established by the City of Chicago include Bloomingdale Ave to the north, the Union Pacific railroad tracks to the south, the train tracks running between Kostner and Cicero to the west, and Humboldt Park proper to the east (to the East side of California Ave). In contrast to the Humboldt Park Official Community Area, the Humboldt Park Neighborhood's borders include Western Avenue to the east, Pulaski Road to the west, North Avenue to the North, and the Union Pacific tracks to the south. The railyards southeast of Grand and Sacramento are also part of the community area. There are two distinct areas of Humboldt Park (the neighborhood): East Humboldt Park (In the West Town Community Area) and West Humboldt Park (In the Humboldt Park Community Area), divided by Sacramento Boulevard. East Humboldt Park/West Town East Humboldt Park is bordered by Sacramento Boulevard, Western Avenue, North Avenue and Division Street. Though it is considered a part of the Humboldt Park neighborhood, it is officially a part of the West Town community area. The area has been known for its working and lower middle class Puerto Rican community from the 1970s to the 2000s. The area has seen a large influx of White middle to upper middle class residents due to the process of gentrification, though parts of the neighborhood are still impoverished and still is known for high crime and gang activity. The area once had the largest middle class Puerto Rican community in the Midwest. The area is home to many social service institutions, bars, restaurants, cafes and shops as well as two sixty-foot Puerto Rican flags on a stretch of Division Street designated Paseo Boricua. Mayor Rahm Emanuel's sweeping school closings closed Von Humboldt Elementary, De Duprey Elementary, and Lafayette Elementary, leaving no neighborhood elementary schools in the area. West Humboldt Park West Humboldt Park is the area west of Sacramento Boulevard. Many residents on this side of Humboldt Park are low-income working class residents.