The Baptist Union of Zambia is a Baptist Christian denomination in Zambia. It is affiliated with the Baptist World Alliance. The headquarters is in Ndola.
The Baptist Union of Zambia has its origins in a South African mission of the Baptist Union of Southern Africa in 1924 It is officially founded in 1975. According to a census published by the association in 2023, it claimed 1,000 churches and 220,000 members.