Kazuo Onoda (小野田 一雄, Onoda Kazuo?, born November 28, 1900 in Shizuoka, date of death unknown) was a Japanese freestyle swimmer. He competed in the 1924 Summer Olympics.
In 1924, Onoda was eliminated in the first round of the 100 metre freestyle event as well as of the 1500 metre freestyle competition. He was also a member of the Japanese relay team which finished fourth in the 4 x 200 metre freestyle relay event.