This study was carried out to evaluate the effect of supplementing diet with different garlic powder concentrations (300 and 600gm/Ton) on performance, carcass characteristics and meat quality (fat %) of Muscovy ducks exposed to different stocking densities; standard stocking density (4 birds/m²) and high stocking density (8 birds/m²). A total number of 180 one -day -old Muscovy ducklings were used in this experiment. Birds were randomly allocated into 18 symmetrical pens classified into 6 treatment groups (3 replicate / treatment). Groups (C, SS+G₃₀₀, SS+G₆₀₀) raised on standard stocking density and fed on basal diet supplemented with (0 , 300 and 600 g. garlic powder,/ton feed ) respectively while groups (HS, HS+G₃₀₀, HS+G₆₀₀) raised on high stocking density and fed on basal diet supplemented with (0 , 300 and 600 g. garlic powder/ton feed) respectively. The data of growth performance indicated that supplementation of garlic (600 gm / ton) significantly (p > 0.05) improved performance (body weight gain and FCR ) of ducks in standard stocking density (SS+G₆₀₀) group and high stocking density  in (HS+G₆₀₀) group. Concerning carcass characteristic and meat quality, results indicated that, garlic supplementation reduced fat % in thigh and breast muscles. It can be concluded that, adding garlic powder to duck ration can effectively compensate the negative effects of the high stocking density in Muscovy ducks.