| Abbreviation | Definition |
|---|---|
| RCAB | Roman Catholic Archdiocese of Boston |
| RCAN | Roman Catholic Archdiocese of Newark |
| RCAR | Religious Coalition for Abortion Rights |
| RCB | Representative Church Body |
| RCBC | Rabbinical Council of Bergen County |
| RCBO | Roman Catholic Bishop of Orange |
| RCC | Roman Catholic Church |
| RCC | The Rock Community Church |
| RCCA | Renaissance Classical Christian Academy |
| RCCA | Ross Corners Christian Academy |
| RCCA | Ross County Christian Academy |
| RCCC | Raleigh Chinese Christian Church |
| RCCF | Ryerson Chinese Christian Fellowship |
| RCCG | Redeemed Christian Church of God |
| RCCI | Regency Christian Center International |
| RCCM | Regional Council for Christian Ministries |
| RCCS | Rock County Christian School |
| RCDA | Religion in Communist Dominated Areas |
| RCDA | Ring Christlich Demokratischer Akademiker (German: Ring of Christian Democratic Academics; est. 1951 |
| RCDA | Roman Catholic Diocese of Albany |