Johnston Square is a neighborhood in the eastern part of Baltimore, Maryland located east of the Fallsway and west of the Oliver neighborhood, bordered by Greenmount Cemetery at the north and Eager Street at the south. The neighborhood contains portions of the Baltimore City Correctional Facilities and its residents are mostly low income African-American families. It is located in a crime prone region of East Baltimore and has been used as a filming location on the HBO drama The Wire.
The neighborhood contains Johnston Square Elementary School and two parks, Johnston Square Park and Ambrose Kennedy Park. It is one of five neighborhoods whose Urban Renewal Plans are included in the East Baltimore Revitalization Plan.