NKO
| Acronym | Definition |
|---|---|
| NKO | Neptune Krill Oil (health supplement) |
| NKO | Navy Knowledge Online (US Navy) |
| NKO | North Kenwood Oakland (University of Chicago Charter School campus; Chicago, IL) |
| NKO | Nederlandse Katholieke Oudervereniging (Dutch: Dutch Catholic Parents; Netherlands) |
| NKO | Nederlandse Kalibratie Organisatie (Dutch: Dutch Calibration Organization; Netherlands) |
| NKO | New Keith Order (gaming clan) |