Kostadin Velkov (Bulgarian: Костадин Велков; born 26 March 1989) is a Bulgarian professional footballer, who plays as a defender for Balkan Botevgrad.

His is the son of former footballer and manager Anton Velkov.

In June 2017, Velkov signed with Slavia Sofia.

[1] In May 2018, he joined German Regionalliga side Chemnitzer FC.

[2] In December 2020, Velkov returned to Slavia Sofia where he spent a year before signing with Balkan Botevgrad in January 2022.