Cash Asmussen (born March 15, 1962, in Agar, South Dakota) is an American thoroughbred horse racing jockey. Born Brian Keith Asmussen, in 1977 he legally changed his name to "Cash".
From a Texas horse racing family, his parents, Keith and Marilyn "Sis" Asmussen, operate a ranch in Laredo in Webb County, Texas. His brother, Steve Asmussen, is a successful horse trainer in American racing. He is Currently Residing in Laredo Texas, with his Wife, Erica Asmussen and three daughters.