Josef Špacek (7 August 1927 – 11 July 2004) was a Czechoslovak communist politician who was an important member of the government during the 1968 reformist period known as the Prague Spring.
He was appointed to the Central Committee of the communist party of Czechoslovakia after communist party leader Antonín Novotný was replaced by Slovak politician Alexander Dubcek.
Along with Dubcek and other Central Committee members, Špacek was arrested by the Soviets during the Warsaw Pact invasion of Czechoslovakia (22 August 1968).
In the years following the collapse of the Dubcek government, Špacek was relegated to low-level, non-political positions, including working as a forestry official.
Following the restoration of democracy in 1989, he was again politically active and in 1990 was elected to the national parliament.