Ancillon is a family name that may refer to:
- Charles Ancillon (1659–1715), French lawyer and diplomat
- David Ancillon the Elder (1617–1692), French, later Berlin Reformed clergyman
- David Ancillon the Younger (1670–1723), German Reformed clergyman
- Jean Pierre Frédéric Ancillon (1767–1837), Prussian statesman, philosopher and educator of the future King Friedrich Wilhelm IV.
- Louis Frédéric Ancillon (1740–1814), German Reformed theologian and philosopher