Isaac Ellis Ives (20 March 1840 – 7 December 1906) was an English-born Australian politician.

He went to London at a young age and in 1857 migrated to Sydney to work at a Tooth & Co. brewery.

From 1860 he managed a number of warehouses for Tooth & Co. From 1874 to 1879 he served as 3rd Mayor to the Borough of Victoria in Sydney's Lower North Side.

In 1885 he was elected to the New South Wales Legislative Assembly for St Leonards, serving until he retired in 1889.

He was a Sydney City Councillor from 1893 to 1898, serving as 39th Mayor from 1896 to 1897.