Henry Agar (1707–1746) was an Irish politician, and the father of the 1st Viscount Clifden and the 1st Earl of Normanton.
Agar was the eldest son of James Agar of Gowran Castle and his second wife Mary Wemyss, daughter of Sir Henry Wemyss of Danesfort.
[3] Agar extensively rebuilt Gowran Castle and also acquired substantial interests in Dublin by marriage.
He died in 1746: his widow remarried George Dunbar of County Fermanagh.
Political control of the town of Callan, as well as the parliamentary seat of Gowran, passed to Henry's brother James Agar.