Lionel Tollemache, 4th Earl of Dysart

Lionel Tollemache, 4th Earl of Dysart, KT (1 May 1708 – 10 March 1770), styled Lord Huntingtower from 1712 to 1727, was an English peer and landowner.

Lionel's father, in 1712 predeceased his father Lionel Tollemache, 3rd Earl of Dysart – on the latter's death in 1727, Lionel inherited the earldom and five main estates: Ham House in Surrey, Helmingham Hall in Suffolk, Harrington and Bentley in Northamptonshire, and 20,000 acres (8,100 ha; 31 sq mi) in Cheshire. The following year he went on a Grand Tour.

In 1729, he was elected High Steward of Ipswich, a post he held for 41 years.