| Abbreviation | Definition |
|---|---|
| FCMS | Frederick County Middle School |
| FCOC | Freedom Committee of Orange County |
| FCOE | Fresno County Office of Education |
| FCPA | Fairfax County Park Authority |
| FCPC | Forest County Potawatomi Community |
| FCPS | Fairfax County Public Schools |
| FCPS | Fayette County Public Schools |
| FCPS | Frederick County Public Schools |
| FCR | Fulton County Railway |
| FCRC | Fairfax County Republican Committee |
| FCRD | Franklin County Recreation Department |
| FCRE | Fairfax County Retired Educators |
| FCRE | Fairfield County Real Estate |
| FCRP | Fairfax County Rental Program |
| FCRP | Fairfax County Restoration Project |
| FCRS | Franklin County |
| FCS | Fulton County Schools |
| FCSA | Frederick County Sanitation Authority |
| FCSB | Frederick County Sheep Breeders |
| FCSO | Faulkner County Sheriff's Office |