Marion Kim Mangrobang (born September 4, 1991) is a Filipino professional triathlete.

[1] Mangrobang is a gold medalist in the Southeast Asian Games women's and mixed relay triathlon events.

[2] As early as nine years old, she has shown interest in sports and was encouraged by her parents.

Competing in a variety of sports events—from weekly fun runs to both local and international competitions—Mangrobang pursued competitive training in 2014, supported by her Portuguese coach, Sergio Santos.

[4][5] Mangrobang won her third gold medal at the 30th Southeast Asian (SEA) Games women's triathlon at the Subic Bay Boardwalk in Zambales.