Embodiments of golf club heads with cavities and methods to manufacture golf club heads with cavities are generally described herein. In some embodiments, a golf club head comprises a body. The body comprises a strikeface, a backside of the strikeface, a heel region, a toe region opposite the heel region, a sole, a first cavity at the backside of the strikeface, a rear portion opposite the strikeface, and a second cavity at the rear portion. In many embodiments, the golf club head further comprises a cap closing off the second cavity. Other embodiments may be described and claimed.