TKN
| Acronym | Definition |
|---|---|
| TKN | Total Kjeldahl Nitrogen |
| TKN | Thyssenkrupp Nirosta GmbH (German stainless steel producer) |
| TKN | Telecare Knowledge Network (care provider forum) |
| TKN | Takanini (suburb of Auckland, New Zealand) |
| TKN | Troms Kraft Nett (Norwegian energy supplier) |
| TKN | Tokyo Kaijo Nichido (Japanese: Tokyo Marine & Nichido Facilities) |
| TKN | Tongil Korea Net |