Milos Kostic (born April 18, 1941) from Regina, Saskatchewan is the former world record holder of the Ironman World Championship in the Men's 65-69 age group with a time of 11 hours 29 minutes 45 seconds set in 2006.

[3][4] He won his age group at the Ironman 70.3 World Championship in 2011 and 2012.

In 2006, 2007, and 2008 he was awarded the Canadian Grand Master Athlete of the Year by Triathlon Canada.

[6] Kostic attended the University of British Columbia as a foreign student from Belgrade, Yugoslavia (now Serbia).

After obtaining a degree in engineering, he remained in Canada, moving to Regina.