Sir Ralph Milbanke (1725–1798) was an English baronet and Member of Parliament for Scarborough between 1754–61 and later for Richmond between 1761 and 1768.

[3] His father was Sir Ralph Milbanke, 4th Baronet of Halnaby in the County of York who had served as High Sheriff of Yorkshire in 1721.

[6] In January 1759 during the Seven Years' War he was appointed Colonel of the reformed Richmondshire Battalion, North York Militia.

When the militia was called out again in 1778 during the American War of Independence, while the country was threatened with invasion by the Americans' allies, France and Spain, he was colonel of the combined North York Militia regiment.

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