Humberto Mansilla Arzola (born 22 May 1996) is a Chilean athlete specialising in the hammer throw. He has won multiple medals at regional level including silvers at the 2017 South American Championships and 2018 South American Games. His personal best in the event is 80.21 metres set in Cuenca in 2018 (6 kg hammer). His current national record is 77.70 m, set in his hometown in 2021. He represented Chile at the 2020 Summer Olympics.