* Lutheran Church: The Lutheran Church is the second largest Christian denomination in Papua New Guinea, with over 1 million members. The Lutheran Church is organized into three districts: the Evangelical Lutheran Church of Papua New Guinea, the Lutheran Church of New Guinea, and the Gutnius Lutheran Church. The Lutheran hierarchy in Papua New Guinea is headed by the Archbishop of the Evangelical Lutheran Church of Papua New Guinea.
* United Church: The United Church is a Protestant denomination that was formed in 1968 by the merger of the Methodist Church, the Congregational Church, and the London Missionary Society. The United Church has over 800,000 members. The United Church is organized into four regions: the Highlands Region, the Momase Region, the Papuan Region, and the New Guinea Islands Region. The United Church hierarchy in Papua New Guinea is headed by the Moderator of the United Church.
* Anglican Church: The Anglican Church is a Protestant denomination that was founded in Papua New Guinea in 1877 by the Anglican Church of Australia. The Anglican Church has over 500,000 members. The Anglican Church is organized into four dioceses: the Diocese of Port Moresby, the Diocese of Dogura, the Diocese of Popondota, and the Diocese of Aipo Rongo. The Anglican hierarchy in Papua New Guinea is headed by the Archbishop of Port Moresby.