Costa Ronin

• Date of Birth: 1979-02-03 (age 47)
• Nationality: Russia·Australia
• Place of birth: Kaliningrad, RSFSR, USSR

Konstantin "Costa" Ronin (Russian: Константин "Коста" Ронин; born 3 February 1979) is a Russian-born Australian actor and cinematographer, best known for appearances in Red Dog, as Gregorovich on the SBS drama East West 101, as Oleg Igorevich Burov in the FX drama The Americans and as Yevgeny Gromov on Homeland.