Pieter Mertens (born 28 August 1980) is a Belgian former professional road bicycle racer.

He competed as a professional for four years, riding for Vlaanderen–T Interim between 2004 and 2005 and for UCI ProTeam Davitamon–Lotto between 2006 and 2007.

[1] He announced his retirement in October 2007 in order to focus on his medical studies.

[2] His most notable victories include a stage of the 2005 Rheinland-Pfalz Rundfahrt and the overall title of the 2002 Tour de Namur.

[4] Source: [5] This biographical article related to a Belgian cyclist born in the 1980s is a stub.