The United Church of Northern India (UCNI) is a mainline Presbyterian Church society in India belonging to the Protestant Christian denomination. The UCNI was constituted by the union of the Presbyterian Church and Congregational churches in 1924. Since then Congregational churches have been admitted to membership by the Church Courts competent to admit them. UCNI administers its affairs through local churches, Church councils, synods and a General Assembly. The registration numbers used are approved by the UCNI.