A turbine blade with a tip region cooling circuit in which cooling air from a serpentine flow circuit in the main airfoil body passes into the tip cooling circuit and around the suction side and pressure side walls to better cool the airfoil and tip with low cooling air flow. A 5-pass serpentine circuit with a first leg is located along the leading edge and is connected directly to a showerhead arrangement to provide film cooling for the leading edge. The 5-pass serpentine circuit, discharges cooling air from the last leg into impingement holes and exit slots spaced along the trailing edge. The remaining cooling air from the 5-pass serpentine flows from the last leg and into the 2-pass serpentine flow circuit located within the tip section. The cooling air flows along the suction side first, makes a turn around the leading edge in the tip, and then flows along the suction side passage where a row of film cooling holes discharges film cooling air onto the pressure side tip surface. The remaining cooling air flows through a trailing edge tip hole and is discharged.