Steven Walter Blackmore (born 3 March 1962) is a Welsh former rugby union player. He began his international career playing for Wales in the Five Nations championship in 1987  when they lost to Ireland. He also played for Wales in the first Rugby World Cup later that year. In that competition he played in the winning side versus Tonga and Canada in the early stages, and Australia in the third-place play-off.
Blackmore played his domestic rugby at Cardiff RFC.