Klaas Tuinstra (10 February 1945 – 2 February 2022) was a Dutch politician. He was a member of the Anti-Revolutionary Party and later the Christian Democratic Appeal. He was a member of the Provincial States of Friesland from 1971 to 1986, a municipal councillor of het Bildt from 1974 to 1982, and an MP from 1986 to 1994. 