Robert Tichborne (c. 1604 – 1682) was an English soldier who fought in the English Civil War. He was a regicide of Charles I. Before the war he was a linen-draper by trade. In 1643 he was a captain in the London trained bands. He was Lieutenant of the Tower of London in 1647. He was an extreme republican and independent who signed Charles I's death-warrant. He was appointed as a commissioner to settle government of Scotland in 1651, following the Tender of Union. He sat for London in the Little parliament and in Cromwell's House of Lords. He was knighted in 1655, and made lord mayor of London in 1656.