Thomas Kneen (1852 – 23 November 1916) was His Majesty's Clerk of the Rolls for the Isle of Man, a Member of the House of Keys for Glenfaba, and Captain of the Parish of Onchan.
In 1880, upon the appointment of Alfred Adams as Clerk of the Rolls, Dickinson invited him to become his partner in one of the largest legal practices in the Isle of Man.
Then in 1905, on Sir James Gell's death, he became Clerk of the Rolls and senior judge of the Manx High Court.
Kneen was also during his time as Deemster and Clerk of the Rolls a Member of the Legislative Council ex officio; he had conservative political views.
Thomas Kneen died at home in 1916 and was the last Clerk of the Rolls not to be simultaneously First Deemster, as the offices were merged following his death.