| Kalša | |
| Other Name: | Kalsa |
| Settlement Type: | Municipality |
| Subdivision Type: | Country |
| Subdivision Type1: | Region |
| Subdivision Type2: | District |
| Subdivision Name2: | Košice-okolie District |
| Pushpin Map: | Slovakia Košice Region#Slovakia |
| Pushpin Relief: | 1 |
| Pushpin Map Caption: | Location of Kalša in the Košice Region##Location of Kalša in Slovakia |
| Coordinates: | 48.62°N 21.53°W |
| Established Title: | First mentioned |
| Established Date: | 1270 |
| Area Footnotes: | [1] |
| Area Total Km2: | 4.63 |
| Elevation Footnotes: | [2] |
| Elevation M: | 200 |
| Population Footnotes: | [3] |
| Population Total: | 736 |
| Timezone1: | CET |
| Utc Offset1: | +1 |
| Timezone1 Dst: | CEST |
| Utc Offset1 Dst: | +2 |
| Postal Code Type: | Postal code |
| Postal Code: | 441 8 |
| Area Code: | +421 55 |
| Blank Name: | Car plate |
| Blank Info: | KS |
Kalša (hu|Kalsa) is a village and municipality in Košice-okolie District in the Košice Region of eastern Slovakia.
The village of Kalša lies at the southeastern foot of the Slanské vrchy mountains in the Podslanská hills. The village developed in the territory belonging to the monastery of the Crusaders. The first written mention of the village dates from 1270. In the medieval age it belonged to local landowners, later it became the property of the city of Košice by deposit and sale. In the past, the population was involved in traditional agriculture, logging and carting. There was a sawmill and a quarry in the village.
The village lies at an altitude of 202 metres and covers an area of 4.627 km².It has a population of about 700 people.
The records for genealogical research are available at the state archive "Statny Archiv in Kosice, Slovakia"