Post Oak (Quercus stellata) is a North American species of oak in the white oak section.
Post Oak may also refer to: Post Oak, Missouri, an unincorporated community in Johnson County Post Oak, Virginia, an unincorporated community in Spotsylvania County Post Oak Mall, a shopping mall in College Station, Texas Post Oak Tree or Tree That Owns Itself, a tree in Alabama The Post Oak, a mixed-use skyscraper in Houston, Texas