Florian Mennigen (born 10 April 1982 in Ratzeburg) is a German former representative rower. He is a three time world champion and an Olympic gold medallist.

At the 2012 Summer Olympics in London, he was in the crew – the Deutschlandachter- that won the gold medal in the men's eight competition.

Mennigen is an alumnus of Boston University. Following his 2012 Olympic success he was awarded the Silbernes Lorbeerblatt (Silver Laurel Leaf), Germany's highest sports award, for the achievement.