| Koy Maeng | |
| Native Name: | Central Khmer: គយម៉ែង |
| Native Name Lang: | khm |
| Official Name: | Koy Maeng Commune Central Khmer: ឃុំគយម៉ែង |
| Settlement Type: | Commune |
| Pushpin Map: | Cambodia |
| Pushpin Map Caption: | Location within Cambodia |
| Subdivision Type: | Country |
| Subdivision Name: |  Cambodia |
| Subdivision Type1: | Province |
| Subdivision Name1: | Banteay Meanchey |
| Subdivision Type2: | District |
| Subdivision Name2: | Mongkol Borei |
| Unit Pref: | Metric |
| Population As Of: | 1998 |
| Population Density Km2: | auto |
| Geocode: | 010205 |
| Timezone: | ICT |
| Utc Offset: | +07:00 |
Koy Maeng (km|គយម៉ែង in Central Khmer pronounced as /kɔːj maeŋ/) is a commune (khum) of Mongkol Borei District in Banteay Meanchey Province in northwestern Cambodia.[1]