- Quality Glass Company - [ ] 4115 Edwards Road
- Quality Pharmacy - [pharmacy & gift shop] 4747 Montgomery Road,
in the Quality Inn
- Quality Shoppe - [bookbinders, printers & engravers] 4220 Montgomery Road (1910s)
; 2017 Hopkins Avenue (1920s)
- Quatman Cafe - [restaurant/cafe] 2432-2434 Quatman Ave., 1964-current; previously was
Gribble's Food Shop & Cafe and before that as Won's Delicatessen
- The Queen City Concrete Pipe Company - [conrete pipe manufacturer] 5050 Orchard
- Queen City Fabricating Company - [metal goods manufacturer] 5050 Orchard
- Queen City Food Locker - [frozen food lockers] 2207 Norwood Avenue
- Queen City Furnace & Heating Company - [furnace sales & repair] 4049 Edwards Road
- Queen City Petroleum Products - [gasoline station] s.e.c Montgomery and Williams
- Queen City Surplus Sales Bargain Bazaar - [general merchandise] 4552 Montgomery Road
- Queen City Tattoos - [tattoo parlor] 4929 Montgomery Road
- Quick Market, Inc. - [retail & wholesale grocery store] four locations
- Quick Service Cleaners & Dyers - [dry cleaners] 4754 Montgomery Road
- Quick Service Movers - [moving & transfer] 2111 Maple Avenue
- Thomas H. Quigley Dry Cleaners - [cleaners/tailors] 3839 South Madison Avenue; 2433 Williams Av.
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