Tulip Tree, or, in lumbering, Yellow Poplar, a North American forest tree found in much of the eastern third of the United States and in southern Ontario, Canada. It is the state tree of Indiana and Tennessee. The tulip tree is also called tulip poplar, hickory poplar, and whitewood, but is not related to the poplars of the genus Populus.

The tulip tree grows up to 150 feet (46 m) tall. The deeply notched leaves are from about three to six inches (7.5 to 15 cm) long. The showy, tulip-shaped flowers, about 2 1/2 inches (6 cm) wide, each have six petals that are greenish-white with an orange band at their bases. The tree's cone-shaped fruit is approximately 2 1/2 to 3 inches (6 to 7.5 cm) long. For a description of the wood and its uses, The tulip tree is also planted as an ornamental. It grows best in rich, reasonably moist soil.

The tulip tree is Liriodendron tulipifera of the magnolia family, Magnoliaceae.