Keill is a Scottish family name that may refer to:
James Keill (1673–1719), Scottish physician and philosopher Jason Keill, New Zealand musician John Keill (1671–1721), Scottish mathematician and astronomer
See also Keill Randor, fictional character in Douglas Hill's The Last Legionary book series Keeill, a chapel on the Isle of Man Keills Chapel, Scotland Keil (disambiguation)