Henry Alexander (Irish politician)

Henry Alexander (1763 – 6 May 1818) was an Irish politician from County Londonderry who sat in the Parliament of Ireland until its abolition under the Act of Union 1800 and then in the Parliament of the United Kingdom. He was returned as a Member of Parliament for the rotten borough of Old Sarum in the 1802 election.

He was the brother of James Alexander, who was also a Member of Parliament for Old Sarum, and who bought the patronage of the borough in 1820 from their cousin, The 2nd Earl of Caledon. He was also the brother of Josias du Pré Alexander.