Fenor Bog is a regenerated alkaline fen and national nature reserve of approximately 32 acres (0.13 km2) in County Waterford.

It is the county's first national nature reserve and the only extant alkaline fen in the southeast of Ireland.

[2] The bog was purchased by the Irish Peatland Conservation Council (IPCC) and Moin Fhionnurach Development Association (MFDA) in June 1999 to protect the area from further decline.

[3] It is an alkaline fen, the only one of this kind still extant in the southeast of Ireland,[5] with the bog located in a depression which is overlooked by Ballyscanlon Hill.

200 species of mammals, birds, insects, and plants have been recorded within the site,[3] including snipe, cuckoos, stonechats, warblers, reed buntings and barn owls.