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.

[1] The Honolulu Star-Bulletin has referred to Yamashiro as "among the most influential political leaders" in the history of the Big Island of Hawaii.

[1] More specifically, Honolulu Star-Bulletin reporter Hugh Clark has called Yamashiro, "probably … the most significant newsmaker on the Big Island" during the final thirty years of the 20th century.

[2] In 1964, Yamashiro also graduated from the U.S. Army Artillery Officer's Candidate School, located at Fort Sill in Oklahoma.

[1] Though rivals in the election, Kokuban became deputy planning director for several years during Yamashiro's tenure as mayor.

[2] Yamashiro was re-elected to a second, four-year term in 1996, defeating challenger Keiko Bonk of the Green Party by a slimmer than expected margin of 3,148 votes.

[4] Yamashiro came into office facing major economic challenges for the Big Island of Hawaii.

Additionally, the Western United Life Assurance Company hired him as project manager to promote its planned residential development in Hilo.