Cashlaungar (Irish: An Caisleán Gearr), also Cashlaungarr, Cashlaun Gar or Cashlán Gar, is a stone ringfort (cashel) and National Monument located in The Burren, a region in County Clare, Ireland.

Cashlaungar is located in the centre of The Burren, 2.7 km (1.8 miles) south of Carran, overlooking the Kilnaboy–Carran road to the west.

The townland of Tullycommon is probably the Tuluauch-comyn held by (King Torlough) O'Brien in 1298 as given in the Pipe rolls.

Through it in 1317 the army of Diarmait O'Brien reportedly marched on his way to Corcomroe Abbey, "along the fortress-begirt tracks" between Leana and Crughwill.

[7][8] When antiquarian Thomas Johnson Westropp visited it in the 1910s, the ramparts of the ringfort were preserved in three places and built of long worked blocks.