ONL
| Acronym | Definition |
|---|---|
| ONL | On Line |
| ONL | O'Neill, Nebraska (airport code) |
| ONL | Orange and Lemons (band; Philippines) |
| ONL | Order of Newfoundland and Labrador |
| ONL | Odyssey Native Library |
| ONL | Oasis North London (UK coalition of people living with HIV and AIDS) |