| Kamchay Mear | |
| Native Name: | Central Khmer: កំចាយមារ |
| Official Name: | Kamchay Mear District Central Khmer: ស្រុកកំចាយមារ |
| Settlement Type: | District |
| Pushpin Map: | Cambodia |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Cambodia |
| Subdivision Type: | Country |
| Subdivision Name: |  Cambodia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Prey Veng |
| Population As Of: | 1998 |
| Population Footnotes: | [1] |
| Population Total: | 71,284 |
| Timezone: | ICT |
| Utc Offset: | +7 |
| Coordinates: | 11.5667°N 147°W |
| Geocode: | 1402 |
Kamchay Mear (Central Khmer: កំចាយមារ in Central Khmer pronounced as /kɑmcaːj miə/; meaning "to chase away/disperse Mara") is a district located in Prey Veng Province, in south eastern Cambodia.