Orange fruits are characterized at harvesting with physical and sensory properties determine consumer acceptance and in order to identify these characteristics and vulnerability storage and irradiation conditions, Valancia orange fruits were subjected to gamma irradiation at doses of 0.0, 0.5, 1.0, and 1.5 kGy using gamma 60Co irradiator facility. Fruits were kept in a refrigerator for 18 weeks. Results indicated that physical and sensory properties of Valencia orange fruits were affected by storage time and irradiation. The overall color differences were increased and the firmness of fruits and skin were decreased. The used doses of gamma irradiation increased the overall color differences of fruit skin. Whereas the fruit firmness, and the sensory properties (aroma, color, test and firmness) of irradiated Valencia orange fruits were decreased.