- province of NE Belgium: 935 sq mi (2,422 sq km); cap. Hasseltalso Lim·bourg
- province of SE Netherlands: 848 sq mi (2,196 sq km); cap. Maastricht
- former duchy occupying the general area of these two provinces
A former duchy of northwest Europe. Founded in the 11th century, it was incorporated into the Netherlands in 1815 and divided into the Dutch and Belgian provinces of Limburg in 1839.