| Lompnas | |
| Commune Status: | Commune |
| Arrondissement: | Belley |
| Canton: | Lagnieu |
| Insee: | 01219 |
| Postal Code: | 01680 |
| Mayor: | Alexandre Joux[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Plaine de l'Ain |
| Coordinates: | 45.8°N 5.5167°W |
| Elevation M: | 650 |
| Elevation Min M: | 400 |
| Elevation Max M: | 980 |
| Area Km2: | 12.69 |
Lompnas (in French pronounced as /lɔna/; formerly Lompnaz) is a commune in the Ain department in eastern France.