Sir Sassoon Jacob Hai David, 1st Baronet KCSI (11 December 1849 – 27 November 1926) was a member of the community of Baghdadi Jews who lived in Bombay from the late 18th Century into the 20th Century. He was a textile mill-owner and merchant who also became Chairman of the Bank of India.
He was the son of Jacob Isaac David, a leading member of the Jewish community who was amongst the first Jews to move to Bombay. He joined the firm of "E.D. Sassoon and Company" which traded in China and Bombay, but in 1885 started his own firm, "Sassoon J. David & Co., Ltd.", in Bombay.
As a wealthy businessman, he was the lead promoter of the Bank of India, founded in 1906, and became the bank's chairman. He served as Sheriff of Bombay for 1905  and was created a baronet in 1911. He served on the council of the governor general of India, on the Imperial Legislative Council and the Bombay Municipal Corporation for twenty years, becoming its President in 1921. He was made KCSI in the 1922 Birthday Honours. 
He partly financed the construction of the Gateway of India.
He was married to Hannah Sassoon, the daughter of Elias David Sassoon and granddaughter of David Sassoon. His eldest three sons predeceased him and he was therefore succeeded by his surviving son Sir Percival David, 2nd Baronet.
- "Sir Sassoon Jacob David, Merchant-philanthropist, Dies in Bombay, Aged 77". Jewish Telegraphic Agency. Retrieved 7 December 2018.
- Directory Of Bombay City Province 1939. p. 86.
- "No. 32716". The London Gazette (Supplement). 2 June 1922. p. 4322.