Quercus faginea, the Portuguese oak or Valencian oak, is a species of oak native to the western Mediterranean region in the Iberian Peninsula and the Balearic Islands. The wood has been used traditionally as firewood and as timber for construction.
Quercus faginea is a medium-sized deciduous or semi-evergreen tree growing to 20 m tall, with a trunk up to 80 cm in diameter, with grey-brown bark. The tree can live as long as 600 years. The leaves are 4–10 cm long and 1.2–4.0 cm broad (rarely to 15 cm long and 5 cm broad), glossy dark green to grey-green above, and variably felted grey-white below; the margins have five to 12 pairs of irregular teeth. Leaf fall is typically in mid- to late winter. The flowers are catkins, produced between March and April, almost always before holm oak, which grows in similar areas. The acorns are oblong-ovoid, 2.0–2.5 cm long, maturing in 6 months to disperse in September or October.