Jacob Houblon (31 July 1710 – 1770), of Hallingbury, Essex, was a British landowner and Tory politician who sat in the House of Commons between 1735 and 1768.
Houblon was the only surviving son of Charles Houblon, Portugal merchant, of Bubbingworth Hall, Essex and his wife Mary Bate, daughter of Daniel Bate, London merchant, of Barton Court, Abingdon, Berkshire.
The Houblons came from Flanders as Protestant refugees in Queen Elizabeth's time, and became significant London merchants.
He also succeeded his father's first cousin, Sir Richard Houblon, on 13 October 1724, who ordered that his personal estate should be laid out in the purchase of entailed lands.
At the 1741 British general election he was returned as MP for Hertfordshire During his first 12 years in Parliament he regularly voted against the Government, except on the motion for Walpole's removal in 1741, when he was among the Tories who walked out.