Gabčíkovo (Hungarian: Bős, pronounced [ˈbøːʃ]) is a town and municipality in the Dunajská Streda District, in the Trnava Region of southwestern Slovakia.

After the Communist takeover of Czechoslovakia, the city was named after Jozef Gabčík, an important figure in the Czechoslovakian resistance to Nazi occupation.

Gabčíkovo is situated along the Danube river on the border with Hungary, in the southern part of Great Rye Island around 12 km south of Dunajská Streda bordered by Baka to the west, Vrakúň to the east, Pataš, Baloň, Sap and Ňárad to the southeast, and the Hungarian villages of Lipót and Ásványráró to the southwest.

Near to the village, there is the main part of the Gabčíkovo Waterworks, which is the reason for a long-term dispute between Hungary and the Slovak Republic.

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