| Kalasin | |
| Native Name: | กาฬสินธุ์ |
| Settlement Type: | Town |
| Pushpin Map: | Thailand |
| Pushpin Label Position: | bottom |
| Pushpin Map Alt: | Location in Thailand |
| Pushpin Map Caption: | Location in Thailand |
| Coordinates: | 16.4342°N 103.5092°W |
| Subdivision Type: | Country |
| Subdivision Name: | Thailand |
| Subdivision Type1: | Province |
| Subdivision Name1: | Kalasin Province |
| Established Title: | Founded |
| Established Date: | 1937 |
| Leader Title: | Mayor |
| Leader Name: | Jaruwat Bunpherm |
| Unit Pref: | Metric |
| Area Total Km2: | 16.96 |
| Elevation M: | 152 |
| Population Footnotes: | [1] |
| Population Total: | 34,429 |
| Population As Of: | 2015 |
| Population Density Km2: | auto |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Postal Code Type: | Postal code |
| Postal Code: | 46000 |
| Area Code: | (+66) 43 |
Kalasin (th|กาฬสินธุ์) is a city (thesaban mueang) in northeast Thailand, the capital of Kalasin Province.[2] As of 2015, it has a population of 34,429[1] It covers the whole tambon Kalasin of the Mueang Kalasin District, an area of . Kalasin lies north-northeast of Bangkok by road.