Sardar Gian Singh Rarewala (16 December 1901 – 31 December 1979) was an Indian politician and the first Chief Minister (actually designated as the Prime Minister) of the former Indian state of Patiala and East Punjab States Union.

On 13 January 1949 a broad-based ministry was constituted and Rarewala was sworn in as its Prime Minister.

In 1951, Rarewala was elected to the PEPSU Legislative Assembly from the constituency of Payal as an independent candidate.

He became the Chief Minister of the PEPSU on 22 April 1952, heading a United Front ministry.

On 14 December 1968, Rarewala left Congress and joined the Shiromani Akali Dal, probably because of his differences with Morarji Desai.