Stephen Kei Yamashiro (July 15, 1941 – May 24, 2011) was an American politician and lawyer who served as the former Mayor of Hawaii County from 1992 to 2000. Yamashiro served on the Hawaii County council from 1976 to 1990, including eleven years as the council's chairman. Akana's death necessitated a special election to fill the remainder of Akana's unexpired term.
Yamashiro came into office facing major economic challenges for the Big Island of Hawaii. The island's once thriving sugar industry had declined, causing the loss of agricultural jobs. He was succeeded by Harry Kim in December 2000. It was never built.
Yamashiro died from pneumonia at Hilo Medical Center in Hilo, Hawaii, on May 24, 2011, aged 69. He was survived by his wife, Della E. Allison.