HSwMS Niord[Note 1] was a Swedish first-class coastal defence ship (Pansarskepp) of the Oden class.

A follow-on to the name-ship of the class Oden, Niord differed in having improved Harvey steel armour and two additional casemate-mounted 12 cm (4.7 in) guns.

After an update completed in 1917 that radically altered the ship's appearance by replacing the two funnels with one, Niord was retired from front-line service in 1922.

The new ships differed from their predecessor in having improved steel, which allowed a reduction of 200 long tons (200 t) in weight, and thus the addition of two more casemate-mounted 12 cm (4.7 in) guns.

A full load of 280 long tons (280 t) of coal was carried, which gave a design range of 2,500 nautical miles (4,600 km; 2,900 mi) at 10 knots (19 km/h; 12 mph).

[1] After the 1917 reconstruction, coal capacity was expanded to 300 long tons (300 t), which gave a design range of 2,530 nautical miles (4,690 km; 2,910 mi) at 10 knots (19 km/h; 12 mph).

[6] Armament consisted of two single Bofors 25 cm (9.8 in) M1894 C guns mounted in turrets on the ship's centreline, one fore and the other aft.

[7] Secondary armament consisted of six Bofors 12 cm (4.7 in) guns mounted three each side singularly in casemates amidships.

[5][13] Niord resumed service in 1917, and briefly provided support to Sweden's neutrality in the First World War, but this did not last long as there was limited opportunity to serve before the Armistice of 11 November 1918.

[14] On 22 August, Niord was re-equipped to also act as a tender and, on 12 May 1925, moved to Hägernäs to support the development of what would become the Roslagen Air Corps and their seaplanes, replacing the corvette Freja.

However, soon after, on 25 June, the vessel was ordered to transfer to the naval school at Hårsfjärden, arriving on 13 February the following year to serve as a barracks ship for the cadets.

[16][15] The ship's aft gun was transferred to the coastal artillery battery at Slite before finally being deactivated and placed on display as an exhibit at the Marinmuseum on the island of Stumholmen.