Rossant is a surname of English, Welsh, and French origins.
Notable people with the surname include:
Colette Rossant (born c. 1930s), French-American food writerJames Rossant (1928–2009), American architect, urban designer, and artistJanet Rossant (born 1950), British developmental biologistJohn Rossant (born 1955), American public relations executiveJuliette Rossant, American writerLorrie Rossant, 20th Century British architect and co-founder of the Building Design PartnershipMurray Rossant (1925-1988), American journalist and head of The Century FoundationTomas Rossant, American architect