Thomas Brudenell, 1st Earl of Cardigan (c. 1583 – 16 September 1663), known as Sir Thomas Brudenell, Bt, between 1611 and 1628 and as The Lord Brudenell between 1628 and 1661, was an English peer and Royalist soldier. In 1628 he was elevated to the peerage as Baron Brudenell, of Stonton in the County of Leicester. He fought on the Royalist side in the Civil War and was imprisoned in the Tower of London. Following the Restoration, he was created Earl of Cardigan in 1661.