Oak, genus of about 450 species of trees and shrubs in the beech family (Fagaceae), distributed throughout the north temperate zone and at high altitudes in the tropics. Oak species are characterized by alternate, simple, deciduous or evergreen leaves with lobed, toothed, or entire margins.

In this guide, we’ll explore 58 common types of oak trees with detailed descriptions and identification tips. You’ll learn about their native regions, growth habits, leaf characteristics, and USDA hardiness zones.

A visual identification guide to oak trees, including pictures of oak leaves, bark, and acorns to assist you in identifying the correct type of oak tree.

All you need to know about oak trees in our Grow Guide. Expert advice from BBC Gardeners' World Magazine.

Learn why oak trees (genus Quercus) are biodiversity champions, supporting thousands of species worldwide. From fungi to birds, discover how these trees build ecosystems and what they tell us about nature’s resilience.

Oak trees are broadly categorized into two main groups: the white oak group and the red oak group, each encompassing a variety of species. It’s key to note that these broad categories shouldn’t be mistaken for the individual species sharing their names.

Oak trees are found throughout the world in a variety of habitats, but they are most widely distributed in North America and Asia. These tall and beautiful trees have a variety of uses among both humans and various forms of wildlife.