Dayrolles Blakeney Eveleigh-de-Moleyns, 4th Baron Ventry, DL, JP (22 January 1828 - 8 February 1914), was an Irish hereditary peer, elected as a representative peer in 1871.
Lord Ventry was the son of The 3rd Baron Ventry. In 1860 he married Harriet, daughter of Andrew Wauchope of Niddrie Marischal; they had five sons and four daughters, including Maud Helen who married The 1st Baron Gretton and had issue.