Robert Stewart Munn (23 August 1829 – 17 December 1894) was a Scottish-born merchant and politician in Newfoundland.
He represented Harbour Grace in the Newfoundland House of Assembly as a Reform Party member from 1889 until his death in 1894.
In 1862, Munn became manager of the firm's operation in Harbour Grace.
When William went to England due to poor health in 1881, Munn became the sole manager.
[1] A decline in the price of fish had resulted in accumulating debt for John Munn and Company during the 1890s.