The Irish state has officially approved the following list of national monuments in County Carlow. In the Republic of Ireland, a structure or site may be deemed to be a "national monument", and therefore worthy of state protection, if it is of national importance. If the land adjoining the monument is essential to protect it, this land may also be protected.
CW013-034---- : Holed stone : Aghade [..] National Monument No. 347.
CW004-014---- : Castle - motte and bailey : Knockroe (Rathvilly By.) [..] National Monument No. 603.
CW012-070003- : Castle - tower house : Leighlinbridge [..] National Monument No. 438. Known as 'Black Castle'. Constructed in 1320