HNoMS Uthaug (S304) may refer to one of the following submarines of the Royal Norwegian Navy:
- HNoMS Uthaug (1965), a Kobben-class submarine, commissioned in 1965; transferred to the Royal Danish Navy in 1989; renamed HDMS Sælen
- HNoMS Uthaug (1990), an Ula-class submarine, commissioned in 1991 and in active service
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.