世界海关组织（World Customs Organization，缩写：WCO），是一个帮助各成员国在海关事务方面进行沟通和协作的政府间组织。该组织成立于1952年，当时称海关合作理事会（Customs Cooperation Council，CCC）。1994年10月采世界海关组织为工作名称，而CCC则仍保留为官方名称，方不至于有修改CCC公约之问题。

世界海关组织总部位于比利时布鲁塞尔。它创建了一套国际标准的商品分类原则，称为“商品名称及编码协调制度（Harmonized Commondity Nomenclature and Coding System）”。世界海关组织有176名成员，现在的总干事是御厨邦雄。世界海关组织不负责处理关税及贸易争端，这些事务都被归入了世界贸易组织的权限里。

The World Customs Organization (WCO) is an intergovernmental organization headquartered in Brussels, Belgium. The WCO is noted for its work in areas covering the development of international conventions, instruments, and tools on topics such as commodity classification, valuation, rules of origin, collection of customs revenue, supply chain security, international trade facilitation, customs enforcement activities, combating counterfeiting in support of Intellectual Property Rights (IPR),drugs enforcement,weapans illegal trading, integrity promotion, and delivering sustainable capacity building to assist with customs reforms and modernization. The WCO maintains the international Harmonized System (HS) goods nomenclature, and administers the technical aspects of the World Trade Organization (WTO) Agreements on Customs Valuation and Rules of Origin.