A castle was built on (or near) the site of an even earlier ringfort by Tadhg (Teigue) MacTurlough MacCon O'Connor some time during the 14th century.

The current structure likely dates from the mid-16th century.
Unlike most tower houses in the region, this was built not from limestone but from sandstone drawn from the quarry of Trá Leachain (Flaggy Beach) about 2 km to the southwest.

In 1570, it was owned by Sir Donald (or Donnell) O'Brien of the O'Brien dynasty and in 1582 it was occupied by Brian MacCahill O'Connor.
In 1583, much of the property in the area was surrendered to the Crown and regranted to Turlough O'Brien of Ennistymon.
Doonagore soon fell to the MacClancy (or Clancy) family, the hereditary brehons or lawyers of the O'Briens.

In September 1588, a ship of the Spanish Armada was wrecked below the castle.
One-hundred-seventy survivors were caught by the High Sheriff of Clare, Boetius Clancy and hanged at Doonagore Castle or on a nearby Iron Age barrow near Doolin called Cnocán an Crochaire (Hangman's Hill).

After the 1641 rebellion Doonagore was granted to John Sarsfield in the Cromwellian settlement.

In the late 17th or early 18th century, the castle came into the possession of the Gore family, resulting in the false etymology of "Gore's Castle".
They repaired the castle in the early 19th century, but by 1837 it had once again fallen into a state of disrepair.

It was restored in the 1970s by architect Percy Le Clerc for a private purchaser, an Irish-American named John C. Gorman whose family still owns it.
A castle was built on (or near) the site of an even earlier ringfort by Tadhg (Teigue) MacTurlough MacCon O'Connor some time during the 14th century.
The current structure likely dates from the mid-16th century. Unlike most tower houses in the region, this was built not from limestone but from sandstone drawn from the quarry of Trá Leachain (Flaggy Beach) about 2 km to the southwest. 
In 1570, it was owned by Sir Donald (or Donnell) O'Brien of the O'Brien dynasty and in 1582 it was occupied by Brian MacCahill O'Connor. In 1583, much of the property in the area was surrendered to the Crown and regranted to Turlough O'Brien of Ennistymon. Doonagore soon fell to the MacClancy (or Clancy) family, the hereditary brehons or lawyers of the O'Briens.
In September 1588, a ship of the Spanish Armada was wrecked below the castle. One-hundred-seventy survivors were caught by the High Sheriff of Clare, Boetius Clancy and hanged at Doonagore Castle or on a nearby Iron Age barrow near Doolin called Cnocán an Crochaire (Hangman's Hill).
After the 1641 rebellion Doonagore was granted to John Sarsfield in the Cromwellian settlement.
In the late 17th or early 18th century, the castle came into the possession of the Gore family, resulting in the false etymology of "Gore's Castle". They repaired the castle in the early 19th century, but by 1837 it had once again fallen into a state of disrepair.
It was restored in the 1970s by architect Percy Le Clerc for a private purchaser, an Irish-American named John C. Gorman whose family still owns it.
Doonagore Castle