Samuel Jereton Mariere GCON (1907 – 9 May 1971) was the first governor of the former Midwest State of Nigeria from February 1964 to January 1966.
He was elected a member of the Nigerian House of Representatives for the Urhobo East and later Central district.
The Mid-Western Region was created in 1963 after a plebiscite in which all the Urhobo divisions voted unanimously in favor, and Mariere was later appointed the first governor.
On 16 January 1966 a military coup brought Major General Johnson Aguiyi-Ironsi to power, terminating the first period of democratic rule.
During this period an appointed governor was nominal head of state while an elected premier led the government.