Soviet submarine B-401 may refer to one of the following submarines of the Soviet Navy:
- Soviet submarine B-401 (1968), a Foxtrot-class submarine; sold to India as INS Khanderi of the Indian Navy's Kalvari class
- Soviet submarine B-401 (1984), a Kilo-class submarine; probably an active submarine in the Russian Navy
This article includes a list of ships with the same or similar names. If an internal link for a specific ship led you here, you may wish to change the link to point directly to the intended ship article, if one exists.