| Thenailles | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Thenailles 02.svg |
| Arrondissement: | Vervins |
| Canton: | Vervins |
| Insee: | 02740 |
| Postal Code: | 02140 |
| Mayor: | Christophe Boury[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Thiérache du Centre |
| Coordinates: | 49.8208°N 3.9397°W |
| Elevation M: | 206 |
| Elevation Min M: | 114 |
| Elevation Max M: | 209 |
| Area Km2: | 16.43 |
Thenailles (in French pronounced as /tənaj/) is a commune in the Aisne department in Hauts-de-France in northern France.