Bishop Louis-Marie Ling Mangkhanekhoun was born on April 8, 1944, in Bonha-Louang. He was ordained a priest on Nov. 5, 1972. Pope John Paul II appointed him on Oct. 30, 2000 Vicar Apostolic of Paksé. His episcopal ordination was on April, 22, 2001.
On 16 Dec 2017, he was appointed as Vicar Apostolic of Vientiane. On 22 April 2018, he was installed as Cardinal-Priest of San Silvestro in Capite.