Sardar Ujjal Singh (27 December 1895 – 15 February 1983) was an Indian legislator. He served as the Governor of Punjab (India), followed by Governor of Tamil Nadu. Before this, he was a member of the First Round Table Conference, opened authoritatively by King George V on 12 November 1930.
He was the younger of the two children of Sujan Singh and Lakshmi Devi, a family that followed their parentage back to Sikh martyr Bhai Sangat Singh.
Born in the city of Rawalpindi in the Sindh Sagar Doab of Punjab, he studied in the Khalsa University School, Amritsar, and finished his Graduate degree in History from Government School, Lahore.
His senior sibling was Sir Sobha Singh, the principal contractor during the development of New Delhi, 1911–1930, and the father of author Khushwant Singh.
Khushwant Singh was an observer for prosecution in the 1929 Assembly Bomb Case, in which he recognized and affirmed against Bhagat Singh and Batukeshwar Dutt after they threw bombs at the Delhi assembly in 1929, thusly, Shaheed Bhagat Singh, Sukhdev, and Rajguru were condemned to death for their part in the death of Saunders.
Sardar Ujjal Singh was elected for the Punjab Legislative Council in (1926–36) and kept serving till 1956. He served as Parliamentary Secretary(Home) in the Unionist Government in unified Punjab (1936-1941).
He was assigned as a Sikh agent to the first and second Round Table Conferences held in London. In 1935, he served as secretary of the Khalsa National Party, made by Sir Joginder Singh.
After the partition of India, he moved to Shimla, where Ujjal Singh was elected for the Legislative Council of East Punjab. He served as Minister of Industries and Civil Supplies and as Finance and Industries Minister between 1949 and 1956.
He was a member of the Second Finance Commission set up by the Government of India from June 1956 to September 1957. He served as Governor of Punjab from 1 September 1965 to 27 June 1966 and as Governor of Tamil Nadu from 28 June 1966 to 25 May 1971.
As a member of the Punjabi University Commission (1960), he was instrumental in setting up Punjabi University, Patiala. He was the organizer of Guru Nanak Public School, Chandigarh, where he served as Founder President.
Ujjal Singh passed on at his New Delhi home on 15 February 1983.