Cities in Frederick County, United States ( 155 )
- Dover-Foxcroft
- East Gaffney
- Ebensburg
- Elgin, Texas
- Elim, Pennsylvania
- Eloy, Arizona
- Emmitsburg
- Enoch, Utah
- Ewing, New Jersey
- Fair Plain, Michigan
- Fairview, North Carolina
- Florence, Arizona
- Fox Farm-College
- Foxborough
- Franklin, Massachusetts
- Frederick, Maryland
- Gaffney, South Carolina
- Galena, Kansas
- Glendive
- Gold Camp
- Golden Gate
- Green Valley, Maryland
- Groveville
- Hamilton Square, New Jersey
- Hawthorne, Nevada
- Hightstown
- Holbrook, Massachusetts
- Hudson, New York
- Immokalee
- Jemison
- Johnstown, Pennsylvania
- Kingston Springs
- Lake Wisconsin
- Lawrenceville, New Jersey
- Lely, Florida
- Lely Resort