| Jalšové | |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Name: | Slovakia |
| Subdivision Type2: | Region |
| Subdivision Name2: | Trnava |
| Subdivision Type3: | District |
| Subdivision Name3: | Hlohovec |
| Pushpin Map: | Slovakia Trnava Region#Slovakia |
| Pushpin Relief: | 1 |
| Coordinates: | 48.5°N 67°W |
| Established Title: | First mentioned |
| Established Date: | 1351 |
| Area Total Km2: | 9.33[1] |
| Area Total Sq Mi: | 3.60 |
| Elevation M: | 161[2] |
| Elevation Ft: | 528 |
| Population Total: | 484[3] |
| Population Density Km2: | 52.03[4] |
| Population Density Sq Mi: | 20.09 |
| Postal Code Type: | Postal code |
| Postal Code: | 922 31 |
| Area Code: | +421 33 |
| Blank Name: | Car plate |
| Blank Info: | HC |
| Website: | obecjalsove.sk |
Jalšové (Hungarian: Jalsó) is a village and municipality in the Hlohovec District in the Trnava Region of western Slovakia.
In historical records the village was first mentioned in 1351.
The municipality lies at an elevation of 180 metres and covers an area of 9.331 km². It has a population of about 469 people.
The records for genealogical research are available at the state archive "Statny Archiv in Bratislava, Slovakia"