世界贸易中心一号大楼（英语：One World Trade Center，亦写作1 World Trade Center，简称「1 WTC」）是位于美国纽约曼哈顿下城的摩天大楼，为世界贸易中心在九一一袭击事件遭到损毁后所重建的建筑之一，由丹尼尔·里伯斯金设计，总楼层共地上104层、地下5层，楼高1,776尺（541米），此高度是为纪念1776年签署的《美国独立宣言》而定的。原称自由塔（英语：Freedom Tower），2009年改为现名，2006年4月27日动工兴建，2013年5月10日上梁，2014年11月3日完工。目前为美国与纽约第一高楼、以及世界第七高楼，并取代在九一一袭击事件中倒塌的世贸双子星大楼，成为世界贸易中心的主建筑，由于其表现灾后复原的精神，该栋大楼的整体设计也融合旧纽约天际线的一些重要组成部份。

One World Trade Center (also known as 1 World Trade Center, One WTC and 1 WTC; the current building was dubbed the "Freedom Tower" during initial basework) is the main building of the rebuilt World Trade Center complex in Lower Manhattan, New York City. It is the tallest skyscraper in the Western Hemisphere, and the fourth-tallest in the world. The supertall structure has the same name as the North Tower of the original World Trade Center, which was completely destroyed in the terrorist attacks of September 11, 2001. The new skyscraper stands on the northwest corner of the 16-acre (6.5 ha) World Trade Center site, on the site of the original 6 World Trade Center. The building is bounded by West Street to the west, Vesey Street to the north, Fulton Street to the south, and Washington Street to the east.