Byles is an English surname (spelling variations Biles, Boyles, Billes, Bailie, Bill and others) and/or transliteration of the Gaelic O'Boyles. People with that name include:
Axtell J. Byles (1880–1941), American college football player and coach, lawyer and business executive Dan Byles (born 1974), British politician, ocean rower and polar explorer Gary Byles, contemporary Australian Army officer Janice Byles (born 1944), later Janice Meek, ocean rower and polar explorer John Barnard Byles (1801–1884), British barrister Junior Byles (1948–2025), Jamaican reggae singer Marie Byles (1900–1979), conservationist, solicitor and author Mather Byles (1706–1788), British North American clergyman Mather Byles (loyalist) (1734/5–1814), Congregational cleric in Connecticut Colony Thomas Byles (1870–1912), British Catholic priest, passenger on the RMS Titanic Walter Byles (1840–1921), English barrister and cricketer, son of John Barnard Byles William Byles (1839–1917), British newspaper owner and Liberal politician