Dizy () is a commune in the Marne department in north-eastern France.
Dizy is situated in the Marne valley, on the main road between ÃÂpernay (3 km) and Reims (23 km).
The village is north of Magenta, south of Champillon, east of Hautvillers and west of Ay.
The place is first mentioned in 662 as Villa Disiacum perhaps owing to the roman surname -Decius.
In 1881, the commune which was called Dizy until 1801, then Dizy-sur-Marne, took the name of Dizy-Magenta. In 1965, when Magenta became independent, the village took again the name of Dizy.
The inhabitants of the commune are called Dizyciens.
Dizy is twinned with: