- Caberta, Ursula
- Cafeteria Religion
- Cain, Paul
- CAIR : Council on American Islamic Relations
- Calendars (Religious and other)
- Calvary Chapel
- Calvary Chapel FUAQ
- Calvin Institute for Theology, The
- Calvinism and Arminianism
- Campbell, Wes and Stacy
- Camping, Harold
- Campolo, Tony
- Campus Cults (Nigeria) (Religion News Blog)
- Canaan Land Restoration of Israel Inc.
- Canada
- CAN
- Capital Punishment
- Carden, Paul
- CAPO
- Cargo Cult
- CARP
- Carpet Time
- Castellanos, Cesar (Cesar Castellanos)
- Catalyst
- Catholic Answerrs
- Catholic Apologetics on the Internet
- Catholicism
- Catholic God’s Spirit
- CBAA
- CCHR
- Center for Millennial Studies
- Center for Research on Influence & Control
- Center for the Advancement of Paleo Orthodoxy
- Centering Prayer
- Centers for Apologetics Research, The (CFAR)
- Central Christian Church
- Cerullo, Morris
- CESNUR
- Cessationism
- Chakra
- Channeling
- Charisma Magazine
- Charismatic
- Charismastic Bible Ministries
- Chen Tao
- Chi
- Chi Kung
- Children of God (COG) [aka The Family International]
- Chinmoy, Sri
- Cho, Paul (David) Yonggi
- Choma
- Chopra, Deepak
- Chrnalogar, Mary Alice (Mary Alice Chrnalogar)
- Chrisman, Keith and Nancy
- Christadelphians
- Christian
- Christian Action Group
- Christian Answers.Net
- Christian Answers for the New Age (CANA)
- Christian Apologetics and Research Ministry (C.A.R.M.)
- Christian Apologetics Journal
- Christian Brethren
- Christian Broadcasting Network (CBN)
- Christian Channel Europe, The
- Christian Conventions
- Christian Educational Services
- Christian Exodus
- Christian Fellowship Churches
- Christian Identity
- Christianity
- Christianity 101
- Christian Research Institute
- Christian Research Journal
- Christian Science
- Christians for Biblical Equality
- Chryssides, Dr. George
- Church
- Church in Island Pond, The
- Church of God Restoration
- Church of Jesus Christ Christian
- Church of Jesus Christ of Latter-day Saints
- Church of the Lamb of God
- Church of True Israel
- Church of Wells
- Church Universal and Triumphant
- Church Without A Name
- ”Churches That Abuse”
- Citizens Commission on Human Rights (CCHR)
- City Church
- Clark, Randy
- Cleirbaut, Gilbert
- Coates, Priscilla
- Cohen, Andrew (Andrew Cohen)
- Cole, Ron
- College of Integrated Philosophy
- Collegiate Association for the Research of Principles (CARP)
- Colorado Light Infantry
- ”Combatting Cult Mind Control”
- Come Let Us Reason Together
- Comments From The Friends
- Committee for the Scientific Investigation of Claims of the Paranormal
- Communities, The
- Community of Christ
- Concerned Businessmen’s Association of America (CBAA)
- Concerned Christians
- Conspiracy Theories
- Contemplative Prayer
- Contemporary Christian Music
- Contenders, The
- ”Conversations With God”
- Cook, Tim
- Cooneyites
- Copeland, Kenneth
- Cornerstone Magazine
- Corporal Punishment
- Corporate Christ
- Corporate Church
- Corporate Cult
- Cosmic Ordering Service
- Council for a Parliament of the World’s Religions
- Council on Biblical Manhood and Womanhood
- Council of Conservative Christians
- Council on American Islamic Relations
- Counseling, Theophostic
- Countdown To Armageddon
- Countercult
- ”Counterfeit Revival”
- Countering Contradiction
- Course in Miracles
- Coven
- Covey, Stephen
- Cowan, Douglas
- Creation vs. Evolution
- Creationism And The Early Church
- Creeds
- Creme, Benjamin
- CRI
- Cross+Word
- Crossroads Project, The
- Crouch, Jan and Paul (Jan and Paul Crouch)
- Crowder, John (John Crowder)
- Crowley, Aleister (Aleister Crowley)
- Crunches
- Cult
- Cult Apologist
- ”Cult Awareness Network” (Scientology’s hate group)
- Cult Awareness Network (the legitimate one)
- Cult Experts
- Cult Info
- Cult Information Agency
- Cult Information Centre
- Cult of Christianity
- Cult News (Religion News Blog)
- Cult, Cargo
- Cult, Commercial
- Cult, Corporate
- Cultic
- Cult Solutions
- Cultic Studies Journal
- Curses, Generational
- Curott, Phyllis