Antonio Bonilla Sanmartín (December 6, 1882 – November 9, 1937) was a Spanish sport shooter who competed in the 1920 Summer Olympics.In the 1920 Summer Olympics he participated in the following events:Team 30 metre military pistol - sixth placeTeam 300 metre military rifle, prone - seventh placeTeam 50 metre small-bore rifle - ninth placeTeam free rifle - eleventh placeTeam 50 metre free pistol - twelfth placeTeam 300 and 600 metre military rifle, prone - twelfth placeTeam 600 metre military rifle, prone - 13th placeTeam 300 metre military rifle, standing - 14th place300 metre free rifle, three positions - result unknown50 metre small-bore rifle - result unknown