Sid Fairgate is an fictional character on Knots Landing, and one of the original characters. He was portrayed by Don Murray.

Sid Fairgate was the husband of Karen Fairgate and the former husband of Susan Philby. After marrying Karen, they and their three children lived together in the iconic Califonia cul-de-sac until 1980 (the second season) when Sid died by driving of the side of a cliff.