John Nevill, 3rd Earl of Abergavenny (25 December 1789 – 12 April 1845), styled Hon. John Nevill until 1826 and Viscount Nevill from 1826 to 1843, was an English peer. He was wounded while on active service in the Peninsular War, and after the close of the Napoleonic War, took holy orders, holding family livings in Norfolk and Suffolk. The deaths of his two elder brothers made him heir to his father's earldom, to which he succeeded in 1843, but he was in delicate health and died in 1845.