Thomas de Beauchamp, 12th Earl of Warwick, KG (16 March 1338 – 8 April 1401[1]) was an English medieval nobleman and one of the primary opponents of Richard II.

Beauchamp brought a large contingent of soldiers and archers to King Richard's Scottish campaign of 1385.

After Richard regained power, Beauchamp retired to his estates, but was invited to London on a ruse in 1397 and charged with high treason, supposedly as a part of the Earl of Arundel's alleged conspiracy.

The next year, however, he was moved back to the Tower, until he was released in August 1399 after Henry Bolingbroke's capture of Richard II.

He was buried with his wife Margaret in the south transept of the Collegiate Church of St Mary, Warwick, but their tomb was destroyed by fire in 1694.