Paul Henri Vasseur (1884–1971) was a French freestyle swimmer and water polo player. He competed in water polo at the 1900, 1912 and 1920 Summer Olympics and finished in third, fifth and ninth place, respectively. At the 1906 and 1920 Games he took part in the 4 × 200 m, 400 m and one mile swimming events, but failed to reach the finals.