| Abbreviation | Definition |
|---|---|
| DCTA | Denton County Transit Authority |
| DCTA | Denton County Transportation Authority |
| DCTC | Dakota County Technical College |
| DCTC | Dallas County Technical Center |
| DCTC | DeKalb County Technology Center |
| DCTC | Diversity Consortium of Tompkins County |
| DCTC | Dutchess County Transportation Council |
| DCTO | Dallas County Tax Office |
| DCTR | Douglas County Trail Riders |
| DCTS | Dauphin County Technical School |
| DCTS | Delaware County Technical Schools |
| DCTS | Douglas County Transit Solutions |
| DCVMA | Dallas County Veterinary Medical Association |
| DCVMA | Dane County Veterinary Medical Association |
| DCVMA | Delaware County Veterans Memorial Association |
| DCWA | Dinwiddie County Water Authority |
| DCWA | Dorchester County Water Authority |
| DCWAC | Dominguez Channel Watershed Advisory Council (est. 2001; Los Angeles County Department of Public Works; California) |
| DCY | Door County YMCA |
| DELCO | Delaware County |