Aonghus Ó Dálaigh (fl.
c. 1200) was an Irish poet.
Aonghus was a grandson of Cú Connacht Ua Dálaigh (died 1139) and said to be the common ancestor of all the O'Dalys extant.
He is recorded as having six sons: No obit of Aonghus is known to exist in any of the Irish annals.