The Vostok-K (Russian: Восток meaning "East"), GRAU index 8K72K was an expendable carrier rocket used by the Soviet Union for thirteen launches between 1960 and 1964, six of which were crewed.

[1] It incorporated several modifications to the core and strap-ons to man-rate them and the Blok E stage also had the improved RD-0109 engine to correct some deficiences in the RD-0105 used on earlier 8K78s.

The Vostok-K made its maiden flight on 22 December 1960, three weeks after the retirement of the Vostok-L.

[1] The first two Zenit reconnaissance satellites were also launched with the Vostok-K, but it was soon replaced in that capacity with the uprated Vostok-2 booster.

After the conclusion of the Vostok program, there were two remaining 8K72Ks left; these were used to launch four Elektron scientific satellites on 30 January and 10 July 1964.