Champagne-sur-Oise (French pronunciation: [ʃɑ̃paɲ syʁ waz] ⓘ, literally Champagne on Oise) is a commune in the Val-d'Oise department in Île-de-France in northern France.

Champagne-sur-Oise station has rail connections to Persan, Creil, Pontoise and Paris.

The average annual rainfall is 682.8 mm (26.88 in) with December as the wettest month.

The temperatures are highest on average in July, at around 19.9 °C (67.8 °F), and lowest in January, at around 4.8 °C (40.6 °F).

This Val-d'Oise geographical article is a stub.