|Cause of death:||Executed by Frank Semyon|
|Nationality:||Israeli (of Russian origin)|
|Played by:||Timothy V. Murphy|
|First episode:||"The Western Book of the Dead"|
|Appears in:||2 season, 1 episodes|
Osip Agronov was a Russian-Israeli businessman and powerful crime lord who was taking part in a mass rail deal in which Frank Semyon and Jacob McCandless were involved. He served as a personal enemy and rival to Semyon and also appeared as one of the two secondary antagonists of the second season of True Detective.
He was killed during Frank's assault.