Valentin Marius Lazăr (born 21 August 1989) is a Romanian professional footballer who plays as a midfielder and a football manager.

In the summer of 2013, Lazăr signed a contract for three years with FC Dinamo București. He made his debut on 19 July in a match against Poli Timișoara. He scored his first goal in a match against Chindia Târgoviște in the Romanian Cup and a second goal against FC Brașov. In 2014, he scored against Corona Brașov and two goals against Săgeata Năvodari in Liga I. He scored and assisted against big rival Steaua in the Romanian cup. Lazăr ended the 2013–2014 season with 6 goals and 11 assists in all competitions.

On 20 July Lazăr became the new captain after Laurențiu Rus was released from Dinamo. In the first match against Chiajna in the League Cup Lazăr scored a goal. In a match against Universitatea Cluj, Lazăr scored a goal to put Dinamo 2-1 ahead and assisted for 3–1. In the match against Concordia Chiajna Lazăr was sent off in the 76th minute.

In September, Lazăr was loaned to Concordia Chiajna. After four months, the technical director of Dinamo București announced that he was called back from his loan.

Dinamo București

• Cupa României runner-up : 2015–16

CSM Reșița

• Liga III: 2021–22

• DigiSport Liga I Player of the Month: October 2016

• Valentin Lazăr at RomanianSoccer.ro (in Romanian)
• Valentin Lazăr at Soccerway