The County of Tripoli (1109 – 1289) is the last of the Crusader states.

It is founded in the Levant, that is, the modern-day region of Tripoli, northern Lebanon and parts of western Syria which supported an indigenous population of Christians, Druses and Muslims.

When the Crusaders, (Christian, mostly Frankish forces), capture the region in 1109, Bertrand of Toulouse becomes the first Count of Tripoli.

He is a vassal of Baldwin I of Jerusalem.

From this time, rule of the county is decided not strictly by inheritance but by factors such as military force (external and civil war), favor and negotiation.

In 1289, the County of Tripoli falls to Sultan Qalawun of the Muslim Mamluks of Cairo.

The county is absorbed into the Islamic empire.