Muhammad Rian Firmansyah (born 16 December 1998) is an Indonesian professional footballer who plays as a right winger for Liga 4 club Kalbar United.
He was signed for Sarawak FA from Persipon to play in the Malaysia Premier League on 15 January 2019.
Rian signed a year-and-a-half long contract with Bali United F.C. (BUFC) on 15 September 2019, after a month-long trial with the club in which he competed in Trofeo Hamengku Buwono X. BUFC registered him for 2019 Liga 1 to complete its quota of U-23 players because Hanis Sagara Putra was out injured.
Rian made his BUFC debut in Liga 1 on 16 December 2019, coming in as a substitute for Irfan Bachdim in a match against Arema F.C.
In 2021, Rian signed a contract with Liga 1 club PSM Makassar. Rian made his debut on 5 September 2021, again as a substitute in a match against Arema F.C. at the Pakansari Stadium in Cibinong.