Mark Nichols, ONL (born on January 1, 1980) is a Canadian curler from Newfoundland and Labrador, Canada.

Nichols played third for the Brad Gushue rink from 1999 to 2011, and represented Canada at the 2006 Winter Olympics. With Gushue, Nichols has been to three Canadian Junior Curling Championships (winning in 2001) and six Briers (2003, 2004, 2005, 2007, 2008, 2009). He won the World Junior Curling Championships in 2001 with Gushue as well. He also won Gold in the 2006 Winter Olympic Games in Turin, at which he threw a spectacular shot - running back a guard onto another stone which picked another rock that was sitting in a dead zone - in the 6th end of the final against Finland, helping Canada to score 6. Certainly one thing to aid their victory was the fact that Nichols shot a blistering 97 percent in the gold medal final. “When he’s playing that way, we don’t lose very much,” said Gushue.

Nichols also skipped team Newfoundland and Labrador with Shelley Nichols, Brent Hamilton and Jennifer Guzzwell to a Canadian Mixed Curling Championship in 2005.

In the summer of 2011, Nichols married his longtime girlfriend and fellow curler Colette Lemon.