Dennis Thiessen (born April 20, 1961 in Crystal City, Manitoba) is a wheelchair curler who was part of the winning team in wheelchair curling for Canada at the 2014 Winter Paralympics. He played on the winning Canadian team at the 2013 World Wheelchair Curling Championship. His disability is that at seventeen he lost his leg. He is the only Manitoban on the team and lives in Sanford, Manitoba.