Marc Houtzager (born 9 January 1971 in Rouveen) is a Dutch equestrian whose specialty is show jumping.

Houtzager competed in the 2002 Show Jumping World Cup circuit and won the meeting in Dublin.

Houtzager himself won an additional silver medal at the event in the individual competition.

He was selected to represent the Netherlands at the Super League meeting in Rome where they finished fourth.

Later that year he finished fourth at the Grand Prix in Aachen with his horse Opium.