Vojka nad Dunajom (Hungarian: Vajka, pronounced [ˈvɒjkɒ]) is a village and municipality in the Dunajská Streda District in the Trnava Region of south-west Slovakia.

In the 9th century, the territory of Vojka nad Dunajom became part of the Kingdom of Hungary.

After the Austro-Hungarian army disintegrated in November 1918, Czechoslovak and French troops occupied the area, which despite the majority Hungarian populations of southern Slovakia, and without plebiscite, would later be annexed with the Treaty of Trianon in 1920.

Between 1938 and 1945 Vojka nad Dunajom once more became part of Hungary through the First Vienna Award.

In 2005, villagers erected a statue of the Saint in front of the local Catholic Church.