Thomas Osborne, 1st Duke of Leeds, English politician, Treasurer of the Navy (died 1712)

Thomas Osborne, 1st Duke of Leeds, was an English Tory statesman. During the reign of Charles II of England, he was the leading figure in the English government for roughly five years in the mid-1670s. Osborne fell out of favour due to corruption and other scandals. He was impeached and eventually imprisoned in the Tower of London for five years until James II of England acceded in 1685. In 1688, he was one of the Immortal Seven who invited William of Orange to depose James II during the Glorious Revolution. Osborne was again the leading figure in England's government for a few years in the early 1690s before dying in 1712.

The Treasurer of the Navy, originally called Treasurer of Marine Causes or Paymaster of the Navy, was a civilian officer of the Royal Navy, one of the principal commissioners of the Navy Board responsible for naval finance from 1524 to 1832. The treasurer was based at the Navy Pay Office.