Sir Daniel Cooper, 1st Baronet GCMG (1 July 1821 – 5 June 1902) was a nineteenth-century politician, merchant and philanthropist in the Colony of New South Wales. He served as the first speaker of the Legislative Assembly of the colony and was a noted philatelist. Cooper was conferred the hereditary title of Cooper baronet of Woollahra in 1863, the second of four baronetcy conferred to British expatriates in the Australian colonies.