Kenneth Colster Blackburn MNZM (born 1935) is a New Zealand actor and writer.
He has worked in film, television, radio and theatre in New Zealand, Australia, and the United Kingdom since 1972.
In an acting career dominated by New Zealand productions, he is best known internationally for his roles in Xena: Warrior Princess and Farscape.
In New Zealand he is remembered as the boss in popular Roger Hall sitcom Gliding On.
In the 2005 Queen's Birthday Honours, he was appointed a Member of the New Zealand Order of Merit, for services to the performing arts.