| Abbreviation | Definition |
|---|---|
| CLP | Constituency Labour Party |
| CLPD | Campaign For Labour Party Democracy |
| CLPD | Citizens League For Peace And Democracy |
| CLPR | Center for Latino Policy Research |
| CMAP | Constituent Mail Analysis Project |
| CMDR | Co Mi Daje Raka |
| CML | Caucus Markup Language |
| CMP | Communists, Mulayam, and Powar |
| CMRB | Candidate Mark Record Booklet |
| CMRW | Charlotte Mecklenburg Republican Women |
| CNA | Chinese Nationalist Alliance |
| CNDE | Center for Nonviolence and Democratic Education |
| CNE | National Electoral Council (Venezuela) |
| CNLD | Chin National League For Democracy |
| COAT | Coalition to Oppose the Arms Trade |
| COC | Campaign Of Carnage |
| COD | Campaign to Overcome Debt |
| COD | Charter Of Democracy |
| CODEL | Congressional Delegation |
| CODN | Coalition of Democratic Nations |