Manjinder Singh Sirsa (Riar Jat Sikh) (born 28 February 1972) is an Indian politician who is serving as National Secretary of the Bharatiya Janata Party. Sirsa is the member of the Delhi Legislative Assembly, representing Rajouri Garden. He was the MLA of Rajouri Garden, New Delhi on BJP and Akali Dal seat in 2017 bypolls. He was also the President of Delhi Sikh Gurdwara Management Committee, elected first in 2013 and then again in 2017. Sirsa defeated outgoing president Paramjit Singh Sarna in the 2013 elections. On 1 December 2021, he resigned from Shiromani Akali Dal (SAD) citing personal grounds and joined BJP. In August 2023, he was appointed as National Secretary of Bharatiya Janata Party. He was elected as MLA from Rajouri Garden, defeating sitting MLA Dhanwati Chandela by 18190 votes.