Sligo County Museum, Museum on Stephen Street, Sligo, Ireland.

The Sligo County Museum is a museum on Stephen Street housing archaeological artifacts, artworks, and historical objects representing the heritage of County Sligo across multiple exhibition spaces. The collections span different time periods and aspects of local history.

The museum was established in 1955 and occupies a former manse building from 1867 originally belonging to the Congregational Church of Sligo. The building itself reflects the architectural heritage of the period.

The Yeats Room displays manuscripts and photographs that document the poet W.B. Yeats and his connection to the region, along with works by Irish artists George Russell and Jack B. Yeats. The collection shows how important this writer and his artistic contemporaries were to local identity.

The museum occupies a former manse on Stephen Street, next to the Gothic Presbyterian church that has housed Sligo Library since 1954. The building was converted for museum use, so rooms are those of a 19th-century clergyman's residence rather than a purpose-built gallery. A planned new museum building, begun in 2008, was abandoned after groundworks.

The firkin of bog butter on display is described in the museum's collections as over 100 years old, a wooden vessel of preserved fat recovered from Irish bogland. It sits among stone age to modern artefacts covering County Sligo, and is the item visitors most often ask about at the Stephen Street manse.