| Härmakosu | |
| Settlement Type: | Village |
| Pushpin Map: | Estonia |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in Estonia |
| Coordinates: | 59.3942°N 25.4436°W |
| Subdivision Type: | Country |
| Subdivision Name: |  Estonia |
| Subdivision Type1: | County |
| Subdivision Name1: | Harju County |
| Subdivision Type2: | Municipality |
| Subdivision Name2: | Anija Parish |
| Population Total: | 64 |
| Population As Of: | 01.01.2010 |
Härmakosu (German: Hermakosso) is a village in Anija Parish, Harju County in northern Estonia.[1] It has a population of 64 (as of 1 January 2010).[2]