| Pirajoux | |
| Commune Status: | Commune |
| Arrondissement: | Bourg-en-Bresse |
| Canton: | Saint-Étienne-du-Bois |
| Insee: | 01296 |
| Postal Code: | 01270 |
| Mayor: | Noël Piroux[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | CA Bassin de Bourg-en-Bresse |
| Coordinates: | 46.3714°N 5.2994°W |
| Elevation M: | 228 |
| Elevation Min M: | 192 |
| Elevation Max M: | 237 |
| Area Km2: | 12.99 |
Pirajoux (in French pronounced as /piʁaʒu/) is a commune in the Ain department in eastern France.
The Solnan forms most of the commune's eastern border. The Sevron forms parts of the commune's western border.