Vijay Singh (Fijian Hindustani: विजय सिंह born 22 February 1963), nicknamed "The Big Fijian", is a Fijian professional golfer who was number one in the Official World Golf Rankings for 32 weeks in 2004 and 2005. He has won three major championships (The Masters in 2000 and the PGA Championship in 1998 and 2004) and was the leading PGA Tour money winner in 2003, 2004 and 2008. He was inducted into the World Golf Hall of Fame in 2006. He won the FedEx Cup in 2008.

An Indo-Fijian of Hindu background, Singh was born in Lautoka, Fiji and grew up in Nadi. His name means Victorious Lion. A resident of Ponte Vedra Beach, Florida, he is known for his meticulous preparation, often staying at the range hours before and after his tournament rounds working on his game.

Singh is married to Ardena Seth, who is Malaysian. They have a son, Qass Seth.