Baron de Freyne, of Coolavin in the County of Sligo, is a title in the Peerage of the United Kingdom. It was created in 1851 for Arthur French, 1st Baron de Freyne, with remainder to his younger brothers John, Charles and Fitzstephen French. He had earlier represented County Roscommon in the House of Commons and later served as Lord Lieutenant of County Roscommon. French had already been created Baron de Freyne, of Artagh in the County of Roscommon, in 1839, also in the Peerage of the United Kingdom but with normal remainder to heirs male. Lord de Freyne was childless and on his death in 1856 the barony of 1839 creation became extinct. The barony of 1851 creation survives according to the special remainder by his younger brother John, the second Baron.