The County of Amiens (also: Amiénois) was a feudal state centred on the city of Amiens, northern France, that existed from the 9th century until 1077 when the last count became a monk and the county reverted to the French crown. In 1185 the county was united with the French crown under King Philip II of France.^[1]

County of Amiens Comte de Amiens (French)
9th Century–1185
Status	Vassal State of France (9th Century-1077) Crown Land of France (1077-1185)
Capital	Amiens
Common languages	Old French Picard
Religion	Catholicism
Government	County
Count of Amiens
Historical era	Middle Ages
• Established	9th Century
• County reverts to French crown	1077
• United with the French crown	1185
Preceded by Succeeded by West Francia Kingdom of France
Today part of	Somme Department

List of counts of Amiens

• Richard (801-825) ancestor of the House of Buvinids
• Ermenfroi (before 895–919) also count of Vexin and Valois
• Ralph I of Gouy (915-926), also probably Count of Ostervant, from 923 also count of Valois and Vexin, possibly brother-in-law or son-in-law of Ermenfroi (first house of Valois)
• Ralph II of Vexin (Raoul de Cambrai) (926-944), Count of Valois, Amiens and Vexin, son of Ralph I.
• Odo of Vermandois (941-944), son of Count Herbert II of Vermandois, usurped the county in 941, ejected by royal troops in 944.
• Herluin (941-944), Count of Ponthieu (House of Montreuil)
• Walter I of Vexin (945-after 992), from 965 Count of Valois, Amiens and Vexin, probably son of Ralph I.
• Walter II of Vexin Le Blanc (before 998-after 1017), Count of Valois, Amiens and Vexin, from 1017 Count of Mantes, son of Walter I.
• Drogo (after 1017–1035), Count of Amiens, Mantes, Pontoise and Vexin, son of Walter II.
• Walter III [fr] (1035-1063), count of Amiens and Vexin, from 1063 titular count of Maine, son of Drogo
• Ralph IV (1063-1074) Count of Valois, Crépy and Vitry, from 1064 Count of Amiens and Vexin, avoué of five abbeys (Saint-Denis, Jumièges, Saint-Wandrille, Saint-Pierre in Chartres and Saint-Arnoul in Crépy), son of Raoul III.
• Simon (1074-1077), died in 1080, Count of Amiens, Valois, Montdidier, Bar-sur-Aube, Vitry and Vexin, son of Raoul III.

In 1077 Simon became a monk and his possessions were distributed. Valois went to his brother-in-law Herbert IV, Count of Vermandois, Amiens reverted to the French king Philip I while Vexin was divided between William, Duke of Normandy, and the king of France. Bar-sur-Aube and Vitry were occupied by Theobald, Count of Blois.

House of Boves

• Enguerrand I (1085-1118), lord of Boves, Coucy and la Fère
• Thomas (1116-1118), died before 1131, his son, lord of Coucy, Marle, la Fère and Boves

Capetian House of Vermandois

• Ralph I le Vaillant (1102–1152), Count of Valois, Vermandois, Amiens and Crépy, Seneschal of France (1131–1152), Regent of France in 1147