Encyclopedias, Almanacs, Transcripts, and Maps
- Catholic Daughters of the Americas
- Catholic Directory, Official
- Catholic Educational Review
- Catholic Epistles
- Catholic Health Association
- Catholic Library Association
- Catholic Medical Association
- Catholic Near East Welfare Association
- Catholic Students Mission Crusade
- Catholic Theological Society of America (CTSA)
- Catholic Theological Union at Chicago
- Catholic Traditionalism
- Catholic University of America, The
- Catholicity
- Catholicos
- Cathrein, Viktor
- Catrik, John
- Catrou, François
- Cattan
- Cattaneo, Carlo°