Sir Richard Chaffey Baker (22 June 1842 – 18 March 1911), generally referred to by his full name, was an Australian politician.
A barrister by trade, he embarked on a successful career in South Australian colonial politics, serving as Attorney-General of South Australia from 1870 to 1871 and President of the South Australian Legislative Council from 1893 to 1901 before switching to federal politics after federation.
He served as the inaugural President of the Australian Senate from 1901 to 1906.
A noted federalist, he was the son of one-time Premier of South Australia John Baker.
He was an early proponent of an Australian republic.