- Northmoreland Park
- 280 Markle Road, Apollo, PA, 15613
- Nova Place (Allegheny Center Complex)
- 100 South Commons, Pittsburgh, PA, 15212
- O'Reilly Theater
- 621 Penn Avenue, Pittsburgh, PA, 15222
- Oaks Theater
- 310 Allegheny River Boulevard, Oakmont, PA, 15139
- Off The Wall Theater
- 25 West Main Street, Carnegie, PA, 15108
- Olive Or Twist & Upstairs Lounge
- 140 Sixth Street, Pittsburgh, PA, 15222
- One Oxford Centre
- 301 Grant Street, Pittsburgh, PA, 15219
- Open Up
- 3711 Butler Street, Pittsburgh, PA, 15201
- Original Oyster House
- 20 Market Square, Pittsburgh, PA, 15222
- Ormsby Park & Recreation Center
- 79 South 22nd Street, Pittsburgh, PA, 15203