The purpose of the investigation was to determine how adding coriander seed powder affected the broiler chicks' physiological status, blood parameters, microbiological properties, and growth performance as well as carcass characteristics of broiler chickens. A total of 120 One-day-old Avian 48 broiler chickens were divided into four treatment groups, each of which included three replicates. The diet are treatments contained four levels of coriander seed powder (0.0, 3.0, 5.0 and 7.0 %) and lasted for 42 days. The dietary supplementation of coriander seed powder (CSP)did not significantly affect (p > 0.05) growth performance and carcass characteristics of chicks during the whole experiment period compared to control group. However, feeding diets with different levels of CSP had no significant effect on blood serum levels of glucose, total protein, albumin, Uric acid, AST, cholesterol, triglycerides, LDL, HDL, TAC, MDA, immunoglobin G and hematological parameters of broiler chicks. However significantly lower serum levels of ALT were recorded for broilers supplemented with CSP at level 70g/kg compared with other groups. On the other hand, the addition of CSP excreted a notable reduction in the number of coliform bacteria compared to the control group. However, the dietary added CSP led to an increase in the total count compared with the control chicks. The gut morphology characteristics of broiler chicken fed different supplementation levels of CSP are improved compared to the control group. Accordingly, it is concluded that dietary supplementation is beneficial for the productive performance and hematological parameters of broilers.