Viscount Allenby, of Megiddo and of Felixstowe in the County of Suffolk, is a title in the Peerage of the United Kingdom.

It was created on 7 October 1919 for the prominent military commander Field Marshal Sir Edmund Allenby, with remainder, in default of male issue of his own, to his younger brother Captain Frederick Claude Hynman Allenby and his heirs male lawfully begotten.

The latter's son, the third Viscount, who succeeded in 1984 was one of the ninety elected hereditary peers that remain in the House of Lords after the passing of the House of Lords Act 1999, and sat as a crossbencher.

As of 2020[update], the title is held by his son, the 4th Viscount, who succeeded in 2014.

In December 2017, he was a guest of honour at the Tower of David Museum in Jerusalem, which staged a commemoration of General Allenby's capture of the city in 1917.