The present study aimed to assess the household food waste (HFW) as a substituted source of low cost feed for sheep. HFW was freshly collected, weighed, dried, ground and then chemically analyzed. On as-fed basis, HFW was used as an ingredient in the formulating balanced diet for lambs at varying levels of substitution (0 %, 15 % and 30%). On dry matter (DM) basis, HFW contained moderate protein content (14.72%), ether extract (6.96%), non-fibrous carbohydrate (47.39%), and ash (10.98%). The growth performance and feed efficiency of lambs supplemented with 15 and 30% HFW-contained diets were similar to control animals. The effect of HFW on fasted live weight, carcass weight, dressing percentages and meat chemical composition was also within the range of lambs feed on normal diet. Histopathologically, mosaic appearance of glycogen infiltration which may support the fattening effect. Unless, the oval cell proliferation associated with higher serum levels of GGT enzyme in 30% HFW-containing diet, which might be attributed to higher residue levels of iron in HFW. Therefore, HFW might be incorporated in lower concentration in lamb diet.