Baptist Convention of Sierra Leone  The Baptist Convention of Sierra Leone is a Baptist Christian denomination in Sierra Leone. It is affiliated with the Baptist World Alliance. The headquarters is in Freetown. The Baptist Convention of Sierra Leone has its origins in a Canadian mission of the preacher David George in 1792 and the support of the Jamaica Baptist Union. It is officially founded in 1974. In 2017, it had 50 churches and 28,212 members.