The Barrett-Lennard Baronetcy, of Belhus in the County of Essex,[1] is a title in the Baronetage of the United Kingdom.

It was created on 30 June 1801 for Thomas Barrett-Lennard, subsequently Member of Parliament for Essex South.

He was succeeded by his grandson, the second Baronet, the son of Thomas Barrett-Lennard, Member of Parliament for Maldon.

This line of the family failed on the death in 1977 of his son, the fifth Baronet, who died without male issue.

[2] The heir apparent is the present holder's only son Simon James Barrett-Lennard (b.