Marino Vanhoenacker (born 19 July 1976 in Ostend) is a Belgian triathlete.

On 3 July 2011, he set a world best time for Ironman full distance triathlon at the Ironman Triathlon at Klagenfurt in Austria, finishing after 7 hours, 45 minutes and 58 seconds, beating Luc Van Lierde's 1997 time of 7h50m27s.

His time was subsequently beaten by Lionel Sanders at Ironman Arizona in 2016; the current world best time is held by Tim Don in a time of 7 hours, 40 minutes and 23 seconds at Ironman Brazil in May 2017. .

His best results Vanhoenacker achieved in Ironman Austria in Klagenfurt, which he has won 6 times, beating the world record by compatriot Luc Van Lierde in 2011 by over four minutes.

He now lives at Jabbeke, and has a daughter with his girlfriend Elke: Jirte, born in 2003.