普世教会协会，又称世界基督教协会或世界基督教协进会（英语：World Council of Churches，缩写：WCC），简称普世教协，是一个创立于1948年的基督教跨教派合一运动组织。目前，其会员包括了基督教各种主流派系的教会，不过天主教会尚未参与其中，天主教会仅以派出观察员的形式参加会议。该组织的宗旨是促进普世教会合一运动，并以下列声明作为其基础：

普世教会协会将其自身描述为“一个具有348个全球性、地区、地区分支、民族性和地方性教会的团体，寻求统一、共同见证以及基督教服务”。该协会的总部位于瑞士日内瓦的普世教会合一运动中心（Ecumenical Centre）。作为普世教会协会成员的基督教派系总共拥有大约5亿9千万信徒，覆盖了大约150个国家。

The World Council of Churches (WCC) is a worldwide inter-church organization founded in 1948. Its members today include the Anglican Communion, the Assyrian Church of the East, most jurisdictions of the Eastern Orthodox Church, the Old Catholic Church, the Oriental Orthodox Churches, most mainline Protestant churches (such as the Lutheran, Mennonite, Methodist, Moravian and Reformed) and some evangelical Protestant churches (such as the Baptist and Pentecostal). Notably, the Roman Catholic Church is not a member, although it sends accredited observers to meetings. The WCC arose out of the ecumenical movement and has as its basis the following statement: