Census records show that at the French Revolution the village had 244 inhabitants, but by 1846 this had risen to 345 after which the population began to decline until it was 172 just prior to the First World War.

In the 12th century, the Lord of Hangard was Foulques Lehardi, a valiant knight, known for his strength and his bravery in many battles, in the crusades.

Under the Bell Tower is the tombstone of Frucourt, wife of Jacques de Roye, the Lord of Hangard Claire.

Between 1670 and 1690, a number of inhabitants moved to Neunkirchen, Germany due to the persecution of protestants under Louis XIV.

On 28 March 1918 the evacuation of the village was organized by Mr. Farcy teacher and Secretary of the City Hall of Hangard.