Baron FitzWarin (alias FitzWaryn, FitzWarine, FitzWarren, etc.) is an abeyant title in the Peerage of England. It was created by Writ of summons for Fulk V FitzWarin in 1295. His family had been magnates for nearly a century, at least since his grandfather Fulk III FitzWarin had recovered Whittington Castle in 1205. This castle near Oswestry was their main residence and the seat of a marcher lordship. It was regarded as situated in the county of Shropshire since 1536 and also in the Domesday Book of 1086, but for much of the intervening period was regarded as part of Wales.
All the male heirs were given the first name Fulk, and the barony with the castle and lordship of Whittington descended from father to son until the death of the 7th Baron in 1420. It then passed to Elizabeth FitzWarin and into the Bourchier family. The 11th Baron FitzWarin was created Earl of Bath in 1536. The barony has been abeyant since the death of Edward Bourchier, 4th Earl of Bath, 14th Baron FitzWarin, in 1636.
In 1341/2, William FitzWarin was called to a King's counsel. Earlier scholars of the Peerage deemed this a summons to Parliament, which would have thereby created a second FitzWarin barony. However, New Complete Peerage concludes that this was not a Parliament, and hence would not have given rise to a barony.