Dlhá nad Váhom (Hungarian: Vághosszúfalu) is a village and municipality in Šaľa District, in the Nitra Region of southwest Slovakia.

The village lies at an altitude of 118 metres and covers an area of 9.07 km².

After the Austro-Hungarian army disintegrated in November 1918, Czechoslovak troops occupied the area, later acknowledged internationally by the Treaty of Trianon.

Between 1938 and 1945 Dlhá nad Váhom once more became part of Miklós Horthy's Hungary through the First Vienna Award.

This Nitra Region geography article is a stub.