Katie and her husband Bill have been together for quite some time now. During the 2010 Winter Olympics, shortly after the medal ceremony, Demong proposed to his longtime girlfriend Katie Koczynski in front of teammates and coaches at the team headquarters near Vancouver. The couple exchanged their vows and officially became husband and wife on July 11, 2010 in Lake Placid, New York.
Demong’s wife is also a former skeleton racer who competed internationally from 2000 to 2005. She also competed on the FIBT World Cup circuit from 2002 through 2005 and placed fourth at a world cup race in Calgary in November 2003.