Robert Wallace (1773 – 1855) was a Scottish politician. He was an electoral franchise reformer and agitator for postal service reform. He was elected to the Westminster Parliament as the member for Greenock in 1832, sitting for that constituency until 1845. Robert Wallace was the founder of the campaign for cheap postage. He appeared in 1835 before the commission of enquiry set up to consider postal service reform. He was the second son of John Wallace (1712–1805) of Cessnock and Kelly in Ayrshire, by his third wife, Janet, third daughter of Robert Colquhoun of the island of St. Christopher. His father was a West India merchant in Glasgow, who amassed a large fortune and became proprietor of some major estates. The eldest son was Sir James Maxwell Wallace. By the father's will Robert Wallace received the estate of Kelly and part of the West Indian property, and was known by the designation of Wallace of Kelly. Robert Wallace was a strong Whig, and often spoke in public during the reform agitation before 1832. After the passing of the Reform Act 1832 he was the first member of parliament for Greenock under the act, and held that seat until 1846.