This map is a snapshot of home addresses, by ZIP code, of Cook County Jail detainees who self-identified as living with mental illness on Jan. 29, 2015. Addresses were provided by detainees and not verified. Also, many inmates could not be mapped either because they were homeless, refused to give an address or gave an address that did not exist.

Map by Christine Wachter and Penny Wang

Notes: The darker the color red on the map, the higher the number of detainees who reported having a mental illness. Some ZIP codes on the edges of Cook County spill into adjacent counties.

Source: Cook County Sheriff’s Office

Deborah is the managing editor at The Chicago Reporter. Email her at and follow her on Twitter @deborahlshelton.

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