The County of Tripoli (1102–1289) was one of the Crusader states. It was founded in the Levant in the modern-day region of Tripoli, northern Lebanon and parts of northwestern Syria.

When the Frankish Crusaders, mostly southern French forces – captured the region in 1109, Bertrand of Toulouse became the first count of Tripoli as a vassal of King Baldwin I of Jerusalem. From that time on, the rule of the county was decided not strictly by inheritance but by factors such as military force (external and civil war), favour and negotiation. In 1289, the County of Tripoli fell to the Muslim Mamluks of Cairo under Sultan Qalawun, and the county was absorbed into Mamluk Sultanate.

Capture by Christian forces

Raymond IV of Toulouse was one of the wealthiest and most powerful of the crusaders. Even so, after the First Crusade, he had failed to secure any land holdings in the Near East. Meanwhile, the County of Edessa, the Kingdom of Jerusalem and the Principality of Antioch had been established. Tripoli was an important strategic goal as it linked the French in the south with the Normans in the north. It was a fertile and well populated area. In 1102, Raymond IV occupied Tortosa (now Tartus) and in 1103, he prepared, together with veterans of the 1101 crusade, to take Tripoli.

Citadel of Tripoli

On a natural ridge, which he named "Mons Peregrinus" (, ), from Tripoli, Raymond IV (also known as Raymond de Saint-Gilles) began the construction of a large fortress, the Citadel of Tripoli ( Qalʻat Ṭarābulus), formerly also known as the "Castle of Saint-Gilles" ( Qalʻat Sān Jīl). Despite this new fortress and seasoned troops, Raymond IV's siege of Tripoli failed to secure the port. He died on 25 February 1105.

Succession

Count William of Cerdagne, Raymond IV's cousin and comrade, was supported by Tancred, Prince of Galilee, but his succession in the Tripoli campaign was challenged by Raymond IV's illegitimate son, Bertrand of Toulouse. Bertrand of Toulouse, who was supported by Baldwin I of Jerusalem, arrived in the Near East with a substantial army and a large Genoese fleet. Despite his contribution to its establishment, Baldwin I did not directly control the County of Tripoli. Nevertheless, the County of Tripoli owed fealty (allegiance) and homage (declarations of allegiance) to him, and he, in return, provided support to the county in times of trouble.

Muslim forces (Turk and Egyptian) attacked the County of Tripoli along its borders, especially those to the east. This included the castles of Krak des Chevaliers, Anaz, Tell Kalakh, Qalaat el Felis and Mardabech.

Religion

In religious matters, the counties of the Kingdom of Jerusalem were expected to follow the lead of the Latin patriarch of Jerusalem. However, Count Pons had formed an alliance with Antioch, and acknowledged the Latin patriarch of Antioch. This was so even after a papal edict to the contrary. The earthquake of 1170 resulted in a brief truce between Nur al-Din and the county (unlike a previous less severe earthquake of 1157 where fighting continued).

Contenders

Bertrand of Toulouse, son of Alphonso-Jordan

thumb|upright|Crusader coin, County of Tripoli, .

thumb|upright|Crusader coin, County of Tripoli, .

Alfonso Jordan (1103–1148) was the son of Raymond IV and his third wife, Elvira of Castile. Although he was born in Tripoli, Alphonso-Jordan was raised in France. In 1147, he joined the Second Crusade, which was launched in response to the loss of the County of Edessa to Turkish forces. Alphonso died, possibly poisoned, in Caesarea, in 1148. Paul of Segni, Bishop of Tripoli, who was a friend of the Templar Grandmaster, William of Beaujeu, opposed the succession of Bohemond VII.

Guy II Embriaco (1277–1282) was a former vassal of Bohemond VII in Gibelet (Byblos). Grievances between them had led to enmity and this was part of a larger trade war between Genoa and the Venetians.

The Templars sought to unseat Bohemond VII by supporting Guy II Embriaco. Bohemond VII responded by sacking the Templar house in Tripoli and forests at Montroque.

Fall to the Muslims

Constant infighting, lack of resources, a series of poor harvests, changes to trade routes and the local economy and Muslim and Mongol military pressure led to the decline of the Kingdom of Jerusalem.