Ivor Bertie Guest, 1st Baron Wimborne, 2nd Baronet, DL was a British industrialist and a member of the prominent Guest family.

The Guest family is a British family that has been prominent in business and politics since the 18th century. It was involved in the British iron and steel industry, particularly the Dowlais Ironworks in Wales, which later became part of Guest, Keen and Nettlefolds. Hereditary titles held by members of the family include Baron Wimborne, Baron Ashby St Ledgers, and Viscount Wimborne, all in the Peerage of the United Kingdom.