Sir Roger Leche (1361–1416) was a medieval English courtier, Member of Parliament, and Lord High Treasurer.
After Henry Bolinbroke's return from exile in 1399, and subsequent coronation as King Henry IV, Leche started to acquire property and income from public offices such as Royal commissioner, Justice of the Peace, and High Sheriff of Nottinghamshire and Derbyshire for 1400–01.
He became a member of the King's household, spending time in 1403 securing Carmarthen Castle against the Welsh.
After the accession to the throne of Henry V he was appointed Keeper of the household wardrobe in 1413 and promoted to Lord High Treasurer on 17 April 1416.
From his first marriage he had a son and heir, Sir Philip Leche (died 1420), and four daughters.