HMS Nelson is a stone frigate (shore establishment) of the Royal Navy on Queen Street in Portsmouth, England.

In 1847 a barracks was built within the Duke of York bastion of the 18th-century Portsea fortifications, east of the dockyard, to house troops manning the town's defences.

[1] A wardroom block (with accommodation for officers) was built across the road, on the south side of Queen Street, on the site of the old garrison hospital.

Internally, the principal rooms included the entrance hall which was decorated with fine paintings by Harold Wyllie depicting the Glorious First of June and the Battle of Copenhagen.

[3] In 1906 the nearby Holy Trinity Parish Church was purchased and brought inside the perimeter wall;[2] for a time it functioned as the RN Barracks chapel, but it was destroyed by bombs in the Second World War.