Sir Alexander Denton (21 March 1596 – 1 January 1645) was an English politician who sat in the House of Commons variously between 1625 and 1644.

In early February Colonel William Smith garrisoned Hillesden House with about 260 men to support the King at Oxford.

A force of over 2000 men under Oliver Cromwell and Samuel Luke laid siege to the house at the beginning of March.

After the surrender Smith and Denton were taken prisoner and moved to the Tower of London, while the house was destroyed and the family beggared.

[4] In addition, this Alexander's eldest daughter Elizabeth was the mother of George Chamberlayne Denton, who also represented Buckingham as a Member of Parliament (MP), from 1727 to 1734.