Graaf Horne

County of Horne
Graafschap Horn
State of the Holy Roman Empire
920–1795
Coat of arms
Lordship of Horne (1350)
Capital		Horn
Languages		Limburgish (Dutch)
Religion		Roman Catholicism
Government		Principality
Historical era		Middle Ages
•	Established	920
•	Personal union	1568
•	Annexed by France	1795
•	Concordat	10 September 1801
Succeeded by Meuse-Inférieure

Horne (also Horn, Hoorn or Hoorne) is a small historic county of the Holy Roman Empire in present Netherlands and Belgium. It takes its name from the village Horn, west of Roermond. The residence of the counts of Horne was moved from Horn to Weert in the 15th century.

After the execution in 1568 of Philip de Montmorency who died without male heirs, the Prince-Bishop of Liège, as suzerain of Horne, was declared the direct lord and new count. The bishops ruled the county in personal union. Horne maintained its own laws and customs as well as its financial autonomy. The county included the communes of Neer, Nunhem, Haelen, Buggenum, Roggel, Heythuysen, Horne, Beegden, Geystingen and Ophoven.

It was suppressed in 1795, when it was occupied by the French, and it became part of the French département Meuse-Inférieure.