Pieter Desmet (born 7 June 1983 in Kortrijk) is a Belgian steeplechase and long-distance runner.

[1] He is a two-time national champion for his category, and a member of Atletiek Zuid-West Club in Zwevegem, being coached and trained by Dirk de Maesschulck.

He ran in the third heat of the event, against twelve other competitors, including South Africa's Ruben Ramolefi, and Kenya's Richard Mateelong.

He finished and completed the race in eleventh place, with a time of 8:37.99, failing to advance into the final round.

[2] Desmet also improved his time of 8:31.81 at the 2009 IAAF World Championships in Berlin, Germany, finishing ninth in the heats.