Quadra may refer to:
Quadra, São Paulo, a municipality in Brazil
Quadra Island, British Columbia, Canada
Vancouver Quadra, a federal electoral district in British Columbia, Canada
, a Royal Canadian Navy cadet training center in Comox, British Columbia
Macintosh Quadra, a line of computers made by Apple Computer
Quadra, Telecine introduced by Broadcast Television Systems Inc. in 1993
Quadra, a group of four psychological types in the theory of socionics
Quadra (album), by Brazilian heavy metal band Sepultura
Quadra Blu, a character from Max Rep comics by illustrator Lyman Dally
The fighting style of several characters in the anime manga and light novel Aria the Scarlet Ammo