Henry Dillon, 8th Viscount Dillon (died 1714) was an Irish soldier and politician. In 1689 he sat in the Patriot Parliament. He fought for the Jacobites during the Wiiliamite War, defending Galway against Ginkel and surrendering it in 1691 after a short siege. He obtained the reversal of his father's attainder in 1696 recovering his father's lands.