Stockwell married American swimmer Tracy Caulkins, a three-time Olympic gold medallist, in 1991 in her hometown of Nashville, Tennessee.Jill Lieber, " Love Games: Athletes find rewards better than gold," USA Today (26 August 2004). Retrieved 11 July 2015. The couple live in Brisbane with their five children.Sam Hovland, " Caulkins still holding down records: Former Florida swimmer held five world, 63 American marks," NCAA.com (26 March 2012). Retrieved 11 July 2015. He received an Australian Sports Medal for his swimming achievements in 2000,It's An Honour, Stockwell, Mark William. Retrieved 11 July 2015. and was inducted into the Queensland Sport Hall of Fame in 2009.
