Hadzi may refer to:

• Dimitri Hadzi, an American abstract sculptor
• Hajji, a Muslim honorary title

• Gallinaceous
• Gallinaceous birds
• Gallinago delicata
• Gallinago hardwickii
• Gallinago imperialis
• Gallinago jamesoni
• Gallinago macrodactyla
• Gallinago megala
• Gallinago nemoricola
• Gallinago nigripennis
• Gallinago nobilis
• Gallinago solitaria
• Gallinago stricklandii
• Gallinago undulata
• Gallinaro
• Gallinas Valley, California
• Gall-inducing insect
• Gallin-Kuppentin
• Gallinstan
• Gallinula angulata
• Gallinula comeri
• Gallinula melanops
• Gallinula mortierii
• Gallinula nesiotis
• Gallinula pacifica