| Topoľnica | |
| Other Name: | Tósnyárasd |
| Settlement Type: | Village |
| Subdivision Type: | Country |
| Subdivision Name: | Slovakia |
| Subdivision Type2: | Region |
| Subdivision Name2: | Trnava |
| Subdivision Type3: | District |
| Subdivision Name3: | Galanta |
| Pushpin Map: | Slovakia |
| Pushpin Map Caption: | Location of Topoľnica in Slovakia |
| Coordinates: | 48.1708°N 17.7953°W |
| Leader Title: | Mayor |
| Leader Name: | Zoltán Szilvási |
| Established Title: | First mentioned |
| Established Date: | 1307 |
| Area Total Km2: | 10.47[1] |
| Area Total Sq Mi: | 4.04 |
| Elevation M: | 116[2] |
| Elevation Ft: | 381 |
| Population Total: | 812[3] |
| Population Density Km2: | 76.9[4] |
| Population Density Sq Mi: | 29.7 |
| Postal Code Type: | Postal code |
| Postal Code: | 925 92 |
| Area Code: | +421 31 |
| Blank Name: | Car plate |
| Blank Info: | GA |
| Website: | http://www.topolnica.sk/ |
Topoľnica (Hungarian: Tósnyárasd) is a village and municipality in Galanta District of the Trnava Region of south-west Slovakia.
The municipality lies at an elevation of 119 metres and covers an area of 10.475 km². It has a population of about 832 people.
In the 9th century, the territory of Topoľnica became part of the Kingdom of Hungary. In historical records the village was first mentioned in 1307. Before the establishment of independent Czechoslovakia in 1918, it was part of Pozsony County. 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 Topoľnica once more became part of Miklós Horthy's 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.