Robert Adam Ritchie (18 October 1836 – 16 August 1891) was a Scottish-born Australian politician.
He was born at Paisley in Renfrewshire to dyer John Ritchie and Barbara Henderson.
In 1848 his family followed his elder brother to Sydney, and Ritchie worked at a woodmill in Parramatta managed by his father.
In 1857 he took over the family business, and opened a new branch at Wickham, also merging with a Clyde-based firm.
[1] A Parramatta alderman, Ritchie was elected to the New South Wales Legislative Assembly in 1889 as the member for Central Cumberland.