Philip Lewis Mills (born 30 August 1963) is a Welsh rallying co-driver.

He was winner of the 2003 World Rally Championship (WRC), as co-driver to Petter Solberg.

He has a place in the Welsh Sports Hall of Fame, as the first Welshman to win the Wales Rally.

On 11 June 2010, Mills announced his immediate retirement from co-driving to concentrate on his motorsport preparation business.

Mills later served as a co-driver for Elfyn Evans in the 2018 Tour de Corse, filling in for Daniel Barritt who suffered a concussion during the 2018 Rally Mexico.