| Fontaine-au-Bois | |
| Commune Status: | Commune |
| Image Coat Of Arms: | Blason ville fr Fontaine-au-Bois (Nord).svg |
| Arrondissement: | Avesnes-sur-Helpe |
| Canton: | Avesnes-sur-Helpe |
| Insee: | 59242 |
| Postal Code: | 59550 |
| Mayor: | Hélène Dumortier[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Pays de Mormal |
| Coordinates: | 50.1428°N 3.6478°W |
| Elevation M: | 138 |
| Elevation Min M: | 110 |
| Elevation Max M: | 168 |
| Area Km2: | 7.68 |
Fontaine-au-Bois (in French pronounced as /fɔ̃tɛn o bwa/) is a commune in the Nord department in northern France.[2]