The CRC maintains a relationship of churches in communion with 23 denominations and of churches in cooperation with 21 denominations/partners.
Here are those 44 relationships by global region:
Africa (24), Latin and South America (5), Europe and the Middle East (3), Asia (5), and North America (7).
From the report of the Ecumenical and Interfaith Relations Committee to Synod 2025. See a complete list of relationships at crcna.org/EIRC.