HNoMS Frithjof was a 1. class gunboat (built for the Royal Norwegian Navy.

Like the other Norwegian gunboats of her era, she carried a heavy armament on a diminutive hull.

The vessel was built at the Naval Yard at Horten, and had yard number 76.

Frithjof served with the Norwegian Navy as a gunboat and cadet training ship until stricken in 1928.

This article about a specific military ship or boat of Norway is a stub.