Opened in 1902 as the Powell Street Grounds by Vancouver's second mayor, David Oppenheimer; it was later renamed in honour of the mayor. The park is bounded by Jackson Ave, Dunlevy Ave, Powell St and East Cordova St. Oppenheimer Park's facilities include a softball field, a basketball hoop, a children's playground, and a community centre with bathrooms, meeting space, and public computer access. The park employs two full-time activity coordinators and several part-time staff.
The Asahi baseball team used Oppenheimer Park as its home field prior to World War II, although it is most notable historically as being the site of one of the large demonstrations of striking workers during the events of Bloody Sunday in 1938. The park remained a popular family destination until the late 1980s when crack cocaine trade and abuse began to dominate the park's usage.
Since 2004, initiatives by the Vancouver Police and the Strathcona Business Improvement Association have attempted to return the park to its original image of safe recreation, with some success. The park was upgraded in 2010 with reconfiguration of the pathways, addition of playground, basketball hoop and new field house.
Vancouver's longest running community celebration, the annual Powell Street Festival takes place in and around Oppenheimer Park.