| Abbreviation | Definition |
|---|---|
| CIS | Church in Society |
| CITC | Church In The City |
| CJCC | Church of Jesus Christ Christian |
| CKBC | Capiz Kasapulanan of Baptist Churches |
| CKBC | Charlton Kings Baptist Church |
| CLAO | Church Library Association of Ontario |
| CLB | Church of the Lutheran Brethren |
| CLBA | Church of the Lutheran Brethren of America |
| CLC | Church Leadership Connection |
| CLCI | Christian Life Churches International |
| CLCI | Covenant Life Church International |
| CLCS | Calvary Lutheran Church and School |
| CLCS | Christ Lutheran Church and School |
| CLF | Church of the Larger Fellowship |
| CLIP | Church Leader Internet Portal |
| CLJC | Church of The Lord Jesus Christ |
| CLPC | Cypress Lake Presbyterian Church |
| CLWS | Church League for Women's Suffrage |
| CLWW | Church of the Lord Wolrd Wide |
| CMA | Church Multiplication Associates |