| Vojka nad Dunajom | |
| Other Name: | Vajka |
| Settlement Type: | Village |
| Pushpin Map: | Slovakia |
| Pushpin Label Position: | none |
| Pushpin Mapsize: | 250 |
| Pushpin Relief: | 1 |
| Pushpin Map Caption: | Location of the village |
| Coordinates: | 47.9667°N 17.3833°W |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Name1: | Trnava |
| Subdivision Type2: | District |
| Subdivision Name2: | Dunajská Streda |
| Established Title: | First written mention |
| Established Date: | 1186 |
| Leader Party: | Independent |
| Leader Title: | Mayor |
| Leader Name: | Donald Álló[1] [2] |
| Area Total Km2: | 8.21[3] |
| Elevation M: | 122[4] |
| Population Footnotes: | [5] |
| Population Total: | 450[6] |
| Population Est: | 467 |
| Pop Est As Of: | 2008 |
| Population Density Km2: | 55.41[7] |
| Demographics Type1: | Ethnicity |
| Demographics1 Title1: | Hungarians |
| Demographics1 Info1: | 87.73% |
| Demographics1 Title2: | Slovaks |
| Demographics1 Info2: | 11.81% |
| Population Density Sq Mi: | 21.39 |
| Area Total Sq Mi: | 3.17 |
| Elevation Ft: | 400 |
| Timezone: | EET |
| Utc Offset: | +1 |
| Timezone Dst: | EEST |
| Utc Offset Dst: | +2 |
| Postal Code Type: | Postal Code |
| Postal Code: | 930 31 |
| Area Code: | +421 31 |
Vojka nad Dunajom (Hungarian: Vajka, in Hungarian pronounced as /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. In historical records the village was first mentioned in 1186.
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. From 1945 until the Velvet Divorce, it was part of Czechoslovakia. Since then it has been part of Slovakia. The town bears the name of Vajk, the pagan name of St. Stephen of Hungary, first King of Hungary. In 2005, villagers erected a statue of the Saint in front of the local Catholic Church.
The municipality lies at an altitude of 123 metres and covers an area of 8.212 km2. In 2008 it had an estimated population of 467 people.
It is situated on an island between the (old) Danube and the "new Danube", i.e. the Danube channel created by the Gabčíkovo–Nagymaros Dams.