Benjamin Koldyke (born March 27, 1968) is an American actor. He is best known for playing Don Frank on How I Met Your Mother (2009–2010), Lee Standish in Work It (2012), and Greg Gibbon on Gortimer Gibbon's Life On Normal Street (2014–2016).

Koldyke was born in Chicago, Illinois, and grew up in nearby Kenilworth. His father, Martin J. "Mike" Koldyke, is a former investment banker who founded Frontenac Company in Chicago and is a life trustee of Northwestern University; through his mother, Patricia Blunt Koldyke, he is a member of the family that controls Laird Norton Company, an investment company with roots in the timber industry of the Pacific Northwest.