Mehtab Singh (1879–1938) was a lawyer, freedom fighter and legislator who became closely associated with Gurudwara Reform movement and later became the president of the Shiromani Gurdwara Prabandhak Committee.

[3] In 1921 he became the member of Punjab Legislative Council and then became its vice president but he resigned from both vice presidency and membership of the council on 11 November 1921, as a protest against British Government for taking away the keys of Harimandir Sahib treasury and he plunged into the Gurdwara Reform Movement.

On 26 November 1921, was arrested at Ajnala in an Akali Diwan on the charge of making a seditious speech and sentenced to 6 months imprisonment, with a fine of Rs.

In October 1923 when SGPC and SAD were declared unlawful organisations, he again with other leaders detained.

[4] At All Parties Convention at Calcutta on 28 and 29 December 1928, he strongly opposed the views of Mohammed Ali Jinnah.