متحف موس أوليه, Local history museum in Ytterån, Krokom Municipality, Sweden

Mus-Olle Museum is a museum in Ytterån, Krokom Municipality, Jämtland, Sweden, based on the collections of Per-Olof Nilsson (1874–1955). It comprises a museum building from 1989, the original museum building from 1911, and Nilsson's preserved cottage. The collections include 150,000 objects, notably 23,000 packaging items, 60,500 stamps, and 19,400 textile and clothing items.

Per-Olof Nilsson, known as Mus-Olle, opened his first museum in 1906 with about 10,000 objects; he had collected since childhood while working as a fisherman. A dedicated museum building from 1911 survives and forms part of the site together with his preserved home. He also benefited from contact with guests at the Ytterån spa, active from 1886 to about 1910. At his death in 1955 he left over 150,000 objects to Ytteråns hembygdsförening, and a new building was added in 1989.

Mus-Olle built his collection with help from wealthy guests at the Ytterån spa, active from 1886 to about 1910, who gave him objects. The 23,000 wrappers from 1890–1940 include chocolate paper, soap boxes, coffee bags, matchboxes, beer coasters and tobacco packaging. The 15,000 buttons and 650 bird eggs show the range of his collecting.

The museum stands in Ytterån, Krokom municipality, 800 m north of the E14 and close to the shore of Alsensjön. The 1989 building adjoins the original 1911 museum building and Mus-Olle's preserved cottage. The museum closed in 2026, so check locally before planning a visit.

Mus-Olle profited from contact with wealthy guests at the Ytterån spa, active from 1886 to about 1910, who supplied him with objects. Among his 150,000 items are 650 bird eggs, 19 wasp nests and 1,600 insects.