Sir John Woolmore KCH FRS (1755 – 2 December 1837) was an English mariner.
He served as chairman of the East India Docks Company, and was deputy master of Trinity House.
Woolmore went on to own or part-own seven merchant vessels trading in the East Indies – Earl of Wycombe, Earl Howe, Admiral Gardner, Lord Duncan, Sir William Bensley, Harriett and Huddart.
He also became a partner with his brother-in-law Charles Hampden-Turner and Joseph Huddart in a business producing rope and cordage.
With William Jacob, he served as one of two Members of Parliament for Westbury, Wiltshire, from 1806 to 1807, having purchased the seat from the trustees of Montagu Bertie, 5th Earl of Abingdon.