Philip O'Reilly

Philip O'Reilly may refer to:
 * Philip O'Reilly (Cavan County MP) (1599–1655), member of parliament for County Cavan, and leading member of the 1641 Rebellion
 * Philip Og O'Reilly (c. 1640–1703), member of parliament for Cavan Borough
 * Philip Leo O'Reilly, Irish bishop
 * Philip O'Reilly (rugby union) Japanese rugby union player