Dayrolles Blakeney Eveleigh-de-Moleyns, 4th Baron Ventry, DL, JP (22 January 1828 – 8 February 1914), was an Irish hereditary peer, elected as an Irish representative peer in 1871.
Lord Ventry was the son of Thomas de Moleyns, 3rd Baron Ventry.
In 1860, he married Harriet, daughter of Andrew Wauchope of Niddrie Marischal.
They had five sons and four daughters.