Abstract: Background and Objective: This study was carried out to investigate the effect of supplementing proprietary mixture of herbal extracts (Phyto-Cocci) to the corn-soybean meal diet of broiler chickens without using antibiotics on growth performance, Eimeria oocyst shedding and small intestine histology. Materials and Methods: A total of 720 one-day old Ross 308 broiler chicks (as hatched) were subjected to a five-week dietary experiment. The chicks were randomly divided into three experimental groups [basal diets supplemented with 0, 100 and 500 g t–1 ration Phyto-Cocci powder]. Each treatment comprised 4 replicates (60 chicks per replicate). Results: During starter diet stage (the first two weeks of age), chicks that were fed on T1 diet recorded the heaviest body weight compared to other treatments. Whereas, at marketing age, chicks that were fed on T2 or T3 diets recorded the heaviest live body weight compared to the control group. No significant differences were detected among all experimental groups in body weight gain (BWG) during starter and grower periods. The higher and significant BWG values were recorded by chicks which were fed on T2 diet during the finisher and overall periods. No significant differences were detected in feed consumption (FC) among all experimental groups. Nonetheless, the best overall FCR was found in chicks that were fed on T2 ration followed by T3 and T1, respectively. Using Phyto-Cocci in T2 or T3 improved the economic efficiency by 10 and 8%, respectively than control diet. Also, both European performance efficiency index and performance index were improved with Phyto-Cocci addition. Adding Phyto-Cocci increased villus height and width linearly and reduced coccidiosis oocysts count in feces of chicks at different ages. Conclusion: The findings of the present study showed that feed with herbals supplementation (Phyto-Cocci) has a positive effect on productive performance, gut morphology and lowest average number of coccidia oocysts.