Ruben Zepuntke (born 29 January 1993) is a German professional triathlete.

Zepuntke was born, raised, and resides in Düsseldorf, North Rhine-Westphalia, Germany.

[3][4] His father, Lutz, is a landscape architect working in local government.

His mother, Klaudia, is a community nurse and local Social Democratic politician in Düsseldorf, who was elected to the city council in 2009 and became one of three Honorary Mayors serving under the city's Lord Mayor Thomas Geisel in 2014.

He also has a sister, Nora, who works as a teacher in special education.