Philip Costley (born 1970 in Wairoa, New Zealand) is a New Zealand distance runner. He represented his country at the two Commonwealth Games and four World Athletics Cross Country Championships, and has won 33 New Zealand national athletic titles on the track, road and cross country over distances from 3000 metres to 100 kilometres. Costley holds the men's record in the Auckland Marathon. His record run was in the 1997 event, finishing the race in 2:14:03. He has won the event on a further three occasions (1996, 1999, and 2005). Costley is a mathematics teacher at Nelson College.