Thomas Paget, 3rd Baron Paget (c. 1540 – 1590) was a member of the British aristocracy. He was the second son of William Paget, 1st Baron Paget and his wife Anne Preston. He succeeded to the title Baron Paget in 1568 on his older brother Henry's death. Thomas Paget was a Catholic opponent of Elizabeth I. In 1589 he was attainted for allegedly plotting against the queen and his title was forfeited. He fled to Spain where he died shortly afterwards. His son, William Paget, 4th Baron Paget of Beaudesert, a Protestant, was restored to the title in 1604.