Pew Research Center has its own polling on religious identity by state.
For NORTH CAROLINA:
Christian 77%
►Evangelical Protestant 35%
► Mainline Protestant 19%
► Historically Black Protestant 12%
Catholic 9%
►Mormon 1%
► Orthodox Christian 1%
Jehovah's Witness 1%
► Other Christian < 1%
Non-Christian Faiths 3%
Jewish 1%
Muslim < 1%
Buddhist < 1%
Hindu < 1%
Other World Religions < 1%
► Other Faiths 1%
Unaffiliated (religious "nones") 20%
Atheist 2%
Agnostic 3%
► Nothing in particular 15%
Don't know
VIRGINIA:
Christian 73%
► Evangelical Protestant 30%
► Mainline Protestant 16%
► Historically Black Protestant 12%
Catholic 12%
► Mormon 2%
► Orthodox Christian 1%
Jehovah's Witness < 1%
► Other Christian < 1%
Non-Christian Faiths 6%
Jewish 1%
Muslim 1%
Buddhist 1%
Hindu < 1%
Other World Religions < 1%
► Other Faiths 1%
Unaffiliated (religious "nones") 20%
Atheist 2%
Agnostic 4%
► Nothing in particular 15%
Don't know < 1%
SOUTH CAROLINA:
Christian 78%
► Evangelical Protestant 35%
► Mainline Protestant 16%
► Historically Black Protestant 15%
Catholic 10%
► Mormon 1%
► Orthodox Christian 1%
Jehovah's Witness 1%
Non-Christian Faiths 3%
Jewish 1%
Muslim < 1%
Buddhist < 1%
Hindu < 1%
Other World Religions < 1%
► Other Faiths 1%
Unaffiliated (religious "nones") 19%
Atheist 1%
Agnostic 3%
► Nothing in particular 14%
Don't know 1%
Religion in America: U.S. Religious Data, Demographics and Statistics | Pew Research Center