Yukio Mengirarou Shmull^{[lower-alpha 1]} (died June 9, 2018) was a Palauan politician who served as the first Governor of Peleliu from 1983 to 1986.

Shmull served as supervisor of the Palauan government's property and supply division from 1963 to 1967, a member and chairman of the Palau Maritime Authority from 1982 to 1992, a member and vice chairman of the country's foreign investment board from 1978 to 1980 and a member of the Palau National Communications Corporation's board of directors from 1982 to 1985.^[1] He served as the first Governor of Peleliu from 1983 to 1986 and was speaker of the Peleliu State Legislature from 1996 to 1998.^[1] In 2009, he became a member of the Belau National Museum's board of directors of the and he was also a member of the Pacific Asia Travel Association.^[1] In 2011, he received the title of uchelsias of Ngesias in Peleliu.^[1] In 2016, he became a member of the 12th Peleliu State Legislature.^[2]

He died on June 9, 2018 at the age of 78.^[1] On June 19, 2023, President Thomas Remengesau Jr. proclaimed that all flags be flown at half-mast from June 20 to June 25 in honour of Shmull.^[1] In December 2018, he was succeeded as Uchelsias by Shallum Etpison, son of former president Ngiratkel Etpison.^[3]