Five denominations now allow the ordination of gays and lesbians, according to More Light Presbyterians, a national group that tracks the issue.
Presbyterian Church (USA) became the latest with its decision in May.
The other four are the Evangelical Lutheran Church in America, the Episcopalian Church in the USA, the United Church of Christ and the Unitarian Universalist Association of Congregations.
Some Presbyterian churches are considering dropping out of the national organization due to gay ordination.
In August, 1,900 Presbyterians met in Minneapolis to begin exploring that possibility. The group has dubbed itself the Fellowship of Presbyterians and plans to meet again in January.
Whitman Brisky, a Presbyterian and the Chicago attorney who represented those opposed to Scott Anderson's ordination, said he has nothing personally against Anderson but that his ordination "cuts the final legs out from under" anyone within the denomination who wishes to preach or teach the Biblical standards for sexual morality.
Presbyterian Church (USA) is the country's largest Presbyterian denomination, with more than 2 million members in more than 10,000 congregations.
It is distinct from the Presbyterian Church in America, a more theologically conservative and evangelical group with 306,000 members at 1,450 churches. It considers homosexuality a sin and bars practicing homosexuals from ministry.