Alexander Robert Richardson (4 July 1847 – 2 May 1931) was an Australian pastoralist and politician.
He made a fortune through the development of pastoral leases in the North-West, and later served in both houses of the Parliament of Western Australia.
He was a member of the Legislative Council from 1887 to 1890 and a member of the Legislative Assembly from 1890 to 1897, and served as a minister in the government of John Forrest.