Costin Lazăr (born 24 April 1981) is a Romanian former footballer who played as a defensive midfielder for teams such as Sportul Studențesc, Rapid București, PAOK or FC Voluntari, among others.

In March 2009, he was involved in an incident in which he was judged to have been fouled in the box by Oţelul's Alexandru Bourceanu.

[1] On 21 July 2011, Lazăr signed a three-year contract with PAOK FC[2] after he was chosen by the club coach László Bölöni.

[4] On 6 January 2013 Costin Lazar scored a wonderful goal for PAOK, winning 4–1 away to Panthrakikos, in a match of the Greece Super League.

[6] On 25 June 2015, Lazar signed an annual contract with Greek Superleague club Iraklis.