K-211 Petropavlovsk-Kamchatskiy is a Project 667BDR Kalmar class (NATO reporting name: Delta III) Russian nuclear ballistic missile submarine.

The submarine was built by Sevmash, Severodvinsk in the late 1970s and joined the Soviet fleet in 1980.

The submarine continued to serve in the Russian Navy as part of the Pacific Fleet after the collapse of the Soviet Union.

On 28 July 2017 the name Petropavlovsk-Kamchatskiy was assigned to the Kilo-class submarine B-274, under construction as of 2019.

As of 2019 K-211 is laid up at the Zvezda shipyard at Bolshoy Kamen awaiting disposal.