Flammarion may refer to:
- Camille Flammarion (1842–1925), French astronomer
- Gabrielle Renaudot Flammarion (1877–1962), French astronomer, wife of Camille Flammarion
- The Flammarion engraving by unknown artist; appeared in a book by Camille Flammarion
- Flammarion (lunar crater), a lunar crater named after Camille Flammarion
- Groupe Flammarion, a French publishing company