Chiasson is a French surname which means 'of Chiasso' as it originated in the municipality of Chiasso on the Swiss/Italian border.
Notable people with the surname include:
Alex Chiasson (born 1990), Canadian ice hockey player Dan Chiasson (born 1971), American poet and critic Herménégilde Chiasson (born 1946), Canadian playwright and poet John Nelson Chiasson (born 1952), American engineer Macy Chiasson (born 1991), American mixed martial artist Paul Chiasson, Canadian architect Scott Chiasson (born 1977), American baseball player Steve Chiasson (1967–1999), Canadian ice hockey player Warren Chiasson (born 1934), Canadian jazz vibraphonist