Arun Sao (pronounced [ərun sa:v]; born 25 November 1968) is an Indian politician, who is current 2nd Deputy Chief Minister of Chhattisgarh along with Vijay Sharma in the Ministry of Vishnudeo Sai in 6th Chhattisgarh Legislative Assembly from 2023. He represent Lormi Vidhan Sabha seat in legislative assembly of the Chhattisgarh. Earlier, he was elected to the 17th Lok Sabha, lower house of the Parliament of India from Bilaspur, Chhattisgarh in the 2019 Indian general election. He was the President of Bharatiya Janata Party, Chhattisgarh unit from August 2022 to December 2023.

Arun Sao is a graduate of S.N.G. College, Mungeli and K.R. Law College, Bilaspur. In 2001, Arun Sao practiced in the high court and served as a panel lawyer for the Chhattisgarh government in 2004 and for the government from 2005 to 2013 and deputy advocate general of Chhattisgarh High court from 2013 to 2018.