David Šain
David Šain is a Croatian rower. He is an Olympic medalist and won silver at the 2012 Summer Olympics in the men's quadruple sculls event, with Martin Sinković, Damir Martin and Valent Sinković.
Šain is also a two-time world champion, a World Championships bronze medalist and a European Championships silver medalist in quadruple sculls. Together with Martin and the Sinković brothers, he won the gold medal at the 2009 and 2010 World U23 Championships.