Thomas Bateson, 1st Baron Deramore DL (4 June 1819 – 1 December 1890), known as Sir Thomas Bateson, 2nd Bt from 1863 until 1885, was a British peer and Conservative Party politician.

After attending the Royal Military College, Sandhurst he served as an officer in the 13th Light Dragoons.

Bateson was first elected to the House of Commons in 1844 as a Conservative Member of Parliament (MP) for County Londonderry, but he resigned this seat in 1857.

In 1885 he was created Baron Deramore, of Belvoir, in the County of Down in the Peerage of the United Kingdom.

As he had no sons, both the baronetcy and the barony passed by special remainder to his younger brother, George, who became the second baron and third baronet.