The Fagales are an order of flowering plants, including some of the best known trees. They belong among the rosid group of dicotyledons. The following families are typically included here:
- Family Fagaceae (beech family)
- Family Betulaceae (birch family)
- Family Ticodendraceae
- Family Casuarinaceae (casuarina family)
- Family Juglandaceae (walnut family)
- Family Rhoipteleaceae
- Family Myricaceae
- Family Nothofagaceae