| Arelaune-en-Seine | |
| Commune Status: | Commune |
| Arrondissement: | Rouen |
| Canton: | Port-Jérôme-sur-Seine |
| Insee: | 76401 |
| Postal Code: | 76940 |
| Mayor: | Maryline Miranda Teodoro[1] |
| Term: | 2020 - 2026 |
| Intercommunality: | Caux Seine Agglo |
| Coordinates: | 49.482°N 0.771°W |
| Area Km2: | 53.81 |
Arelaune-en-Seine (in French pronounced as /aʁlon ɑ̃ sɛn/) is a commune in the department of Seine-Maritime, northern France. The municipality was established on 1 January 2016 by merger of the former communes of La Mailleraye-sur-Seine and Saint-Nicolas-de-Bliquetuit.[2]