Robert Sedgewick (May 10, 1848 – August 4, 1906) was a Justice of the Supreme Court of Canada.

Born in Aberdeen, Scotland, Sedgewick's family immigrated to Nova Scotia while he was still an infant.

Sedgewick was called to the bar in Ontario in 1872, and in Nova Scotia in 1873 following his return to the province.

The connections thus established would serve him well, as his friend and former Halifax colleague John Sparrow David Thompson, who had become the federal Minister of Justice, appointed Sedgewick as Deputy Minister of Justice in February 1888.

In this capacity, he played an important role in the establishment of the first national Criminal Code, which was enacted in 1892.