The name Dinant comes from the Celtic Divo-Nanto, meaning "Sacred Valley" or "Divine Valley"; it can also be translated as "Celestial Gorge" or "Luminous Gorge" (as in modern Welsh Nant Dwyfol).

The Dinant area was already populated in Neolithic, Celtic, and Roman times. The first mention of Dinant as a settlement dates from the 7th century, when Perpète of Maastricht, Bishop of Tongeren, moved his principal residence from Maastricht to Dinant and founded the church of Saint Vincent. In 870, Charles the Bald gave part of Dinant to be administered by the Count of Namur, the other part by the Bishopric of Tongeren, which was by that time based in Liège.

In the 11th century, the emperor Henry IV granted several rights over Dinant to the Prince-Bishopric of Liège, including market and justice rights. From that time on, the city became one of the 23 ‘‘bonnes villes’’ (or principal cities) of the Prince-Bishopric. The first stone bridge on the Meuse and major repair to the castle, which had been built earlier, also date from the end of the 11th century. Throughout this period, and until the end of the 18th century, Dinant shared its history with its overlord Liège, sometimes rising in revolt against it, sometimes partaking in its victories and defeats, mostly against the neighbouring County of Namur.

Its strategic location on the Meuse exposed Dinant to battle and pillage, not always by avowed enemies: in 1466, Philip the Good, Duke of Burgundy, uncle of Louis de Bourbon, Prince-Bishop of Liège, and Philip’s son Charles the Bold punished an uprising in Dinant during the Liège Wars, by casting 800 burghers into the Meuse and setting fire to the city. The city's economic rival was Bouvignes, downriver on the opposite shore of the Meuse.

Late Medieval Dinant and Bouvignes specialised in metalwork, producing finely cast and finished objects in a silvery brass alloy, called dinanderie and supplying aquamaniles, candlesticks, patens and other altar furniture throughout the Meuse valley (giving these objects their cautious designation "Mosan"), the Rhineland and beyond.

Henri Pirenne gained his doctorate in 1883 with a thesis on medieval Dinant.

In the 16th and 17th centuries wars between France and Spain, Dinant suffered destruction, famine and epidemics, despite its neutrality. In 1675, the French army under Marshal François de Créquy occupied the city. Dinant was briefly taken by the Austrians at the end of the 18th century. The whole Bishopric of Liège was ceded to France in 1795. The dinanderies fell out of fashion and the economy of the city now rested on leather tanning and the manufacture of playing cards. The famous couques de Dinant also appeared at that time.

The city suffered devastation again at the beginning of the First World War. On 15 August 1914, French and German troops fought for the town in the Battle of Dinant; among the wounded was Lieut. Charles de Gaulle. On 23 August, 674 inhabitants were summarily executed by Saxon troops of the German Army – the biggest massacre committed by the Germans in 1914. Within a month, some five thousand Belgian and French civilians were killed by the Germans at numerous similar occasions.[1]