Following the 2015 Supreme Court case legalizing same-sex marriage in the United States, the General Superintendent of the United Pentecostal Church International, David K. Bernard, issued a statement that reiterated the church's belief that marriage is between one man and one woman. The statement urged UPCI members to continue to believe Biblical interpretation, proclaim the message of Jesus Christ, respect the dignity of all people and defend the freedoms of those who opposed the Supreme Court decision.
The General Conference of the United Pentecostal Church International first adopted a position paper on the issue of marriage in 1990. In it, the UPCI condemned the movement of society toward the acceptance of the unions of same-sex couples and unmarried heterosexual couples as equal to heterosexual marriages. This followed the 1977 adoption, a position paper on the issue of homosexuality where the church declared that homosexuality was vile and unclean. The UCPI stated that it wished to "go on record" in opposition to homosexuality as a matter of sin. The church also encouraged others to pray for homosexuals to experience deliverance from what they categorized as something satanic.
The UPCI is a Oneness Pentecostal organization formed in 1945 when the Pentecostal Church Incorporated and the Pentecostal Assemblies of Jesus Christ merged. At its founding, the UPCI had 521 congregations across the United States. As of 2014, the denomination has nearly 4,500 congregations, with a total constituency of around three million people.