Sir Hercules Langrishe, 1st Baronet of Langrishe (1729 – 1 February 1811) was an Irish politician.
He was first elected to represent Knocktopher in the Irish House of Commons in May 1761, and sat until he resigned his seat in March 1800. In 1776 he was also returned for Callan, but was declared not duly elected.
On 19 February 1777 he was created a Baronet, of Knocktopher, County Kilkenny, in the Baronetage of Ireland. On 27 February 1792 he was appointed to the Irish Privy Council.
In Dublin, he was a member of Daly's Club.
He was the great great grandfather of Lt Col John Du Plessis Langrishe FRSE.