| Onayena | |
| Settlement Type: | Settlement |
| Pushpin Map: | Namibia |
| Pushpin Label Position: | bottom |
| Pushpin Mapsize: | 300 |
| Pushpin Map Caption: | Location in Namibia |
| Subdivision Type: | Country |
| Subdivision Name: |  Namibia |
| Subdivision Type1: | Region |
| Subdivision Name1: | Oshikoto Region |
| Subdivision Type2: | Constituency |
| Subdivision Name2: | Onayena Constituency |
| Government Type: | Local Town Council |
| Leader Title1: | Regional Councillor |
| Leader Name1: | Natangwe Iyambo Indongo |
| Unit Pref: | Imperial |
| Population As Of: | 2011 |
| Population Footnotes: | [1] |
| Population Total: | 15 000 |
| Population Blank1 Title: | Ethnicities |
| Timezone: | South African Standard Time |
| Utc Offset: | +2 |
| Coordinates: | -17.9432°N 27.3°W |
| Elevation M: | 1079 |
| Blank Name: | Climate |
| Blank Info: | BSh |
Onayena is the district capital of Onayena Constituency in the north of Oshikoto Region in northern Namibia, situated approximately north of Etosha National Park.
The main economic activities in the constituency are agriculture and cattle rearing. Omahangu is the principal crop in Onayena, while cattle, goats and donkeys are the farming animals in the area. The constituency has important cultural and historical links. Onayena has a settlement prominent for investment opportunities and has a lot of large virgin land available housing and business investment.
Nehale Senior Secondary School is located in Onayena.
Onayena is the hometown of many prominent people in Namibia, such as the multi-award-winning kwaito musician and producer The Dogg, and home to the first Vice-President of Namibia, Nickey Iyambo.