| FREDERICK COMPUTER CONSULTING, LLC | — | W07037914 | 2002-09-23 | Suspended | FREDERICK |
| FREDERICK COMPUTER SERVICES, INC. | — | D03846136 | 1994-03-17 | Suspended | FREDERICK |
| FREDERICK CONCRETE COMPANY, INC | — | D03614054 | 1993-03-03 | Active | FREDERICK |
| FREDERICK CONFERENCE CENTER CORPORATION | — | D02920403 | 1989-12-14 | Suspended | FREDERICK |
| FREDERICK CONSTRUCTION MANAGEMENT, INC | — | D19819846 | 2019-07-17 | Active | FREDERICK |
| FREDERICK CONSTRUCTION SYSTEMS, INC. | — | D04942702 | 1998-03-19 | Suspended | FREDERICK |
| FREDERICK CONSULTANTS, INC. | — | D01542935 | 1983-03-21 | Suspended | FREDERICK |
| FREDERICK CONTRACTORS, INC | — | D00104406 | 1960-01-14 | Suspended | FREDERICK |
| FREDERICK CONTROL SYSTEMS LLC | — | W23721640 | 2023-02-20 | Active | FREDERICK |
| FREDERICK COPIER SYSTEMS, INC. | — | D03919222 | 1994-06-29 | Suspended | FREDERICK |
| FREDERICK COSMETIC & FAMILY DENTISTRY, LLC | — | W22964175 | 2022-05-18 | Active | FREDERICK |
| FREDERICK COUNSELING LLC | — | W16500928 | 2015-02-26 | Active | FREDERICK |
| FREDERICK COUNTRY CLUB, INC. | — | D03343571 | 1991-12-26 | Suspended | FREDERICK |
| FREDERICK COUNTY 4 WHEELERS, INC. | — | D02001055 | 1985-09-17 | Suspended | FREDERICK |
| FREDERICK COUNTY 4-H CAMP & ACTIVITIES CENTER, INC | — | D00814574 | 1977-12-09 | Active | FREDERICK |
| FREDERICK COUNTY 4-H EXECUTIVE COUNCIL, INC. | — | D02093995 | 1986-03-10 | Suspended | FREDERICK |
| FREDERICK COUNTY ADMINISTRATIVE AND SUPERVISORY ASSOCIATION, INC | — | D10313526 | 2004-11-16 | Active | FREDERICK |
| FREDERICK COUNTY ADVOCATES FOR SWIM TEAMS, INC | — | D13325956 | 2009-11-18 | Suspended | FREDERICK |
| FREDERICK COUNTY AFFORDABLE HOUSING LAND TRUST LLC | — | W15030984 | 2013-01-15 | Active | FREDERICK |
| FREDERICK COUNTY AFRICAN AMERICAN CHAMBER OF COMMERCE, INC | — | D13328075 | 2009-11-30 | Suspended | FREDERICK |
| FREDERICK COUNTY AFRICAN AMERICAN CHAMBER OF COMMERCE, INC. | — | D07280639 | 2003-03-21 | Suspended | FREDERICK |
| FREDERICK COUNTY AGRI-BUSINESS ASSOCIATION, INC | — | D05404272 | 1999-07-13 | Suspended | FREDERICK |
| FREDERICK COUNTY AGRICULTURAL SOCIETY, INC | — | D02304996 | 1900-01-01 | Active | FREDERICK |
| FREDERICK COUNTY ART ASSOCIATION, INC | — | D01792597 | 1984-10-10 | Suspended | FREDERICK |
| FREDERICK COUNTY ASSOCIATION OF EDUCATIONAL OFFICE PROFESSIONALS, INC | — | D00430314 | 1973-01-15 | Suspended | FREDERICK |
| FREDERICK COUNTY ASSOCIATION OF REALTORS, INC | — | D00932566 | 1961-12-13 | Active | FREDERICK |
| FREDERICK COUNTY ASSOCIATION OF THE DEAF, INC. (FCAD | — | D10295780 | 2004-11-01 | Suspended | FREDERICK |
| FREDERICK COUNTY BANCORP, INC | — | D07406242 | 2003-05-23 | Merged | FREDERICK |
| FREDERICK COUNTY BANK | — | D05962147 | 2000-08-30 | Merged | FREDERICK |
| FREDERICK COUNTY BUILDING INDUSTRY ASSOCIATION, INC | — | D00696633 | 1976-09-27 | Active | FREDERICK |
| FREDERICK COUNTY BUSINESS INCUBATOR, INC. | — | D04009353 | 1994-11-10 | Suspended | FREDERICK |
| FREDERICK COUNTY CAREER AND TECHNOLOGY ALUMNI AND SUPPORTERS, INC | — | D17431875 | 2016-07-27 | Active | FREDERICK |
| FREDERICK COUNTY CAREER FIREFIGHTERS BENEVOLENT FUND, INC | — | D16778771 | 2015-09-18 | Active | FREDERICK |
| FREDERICK COUNTY CHAMBER FOUNDATION, INC | — | D07764103 | 2004-01-23 | Suspended | FREDERICK |
| FREDERICK COUNTY CHAPTER OF THE SOCIETY FOR HUMAN RESOURCE MANAGEMENT, INC | — | D13462593 | 2010-03-04 | Active | FREDERICK |
| FREDERICK COUNTY CIVIC ARTS SOCIETY LTD | — | D27434489 | 2026-06-10 | Active | FREDERICK |
| FREDERICK COUNTY CIVIL WAR ROUND TABLE, INC. | — | D03423068 | 1992-04-29 | Suspended | FREDERICK |
| FREDERICK COUNTY CIVIL WAR ROUNDTABLE, INC | — | D14807960 | 2012-08-08 | Active | FREDERICK |
| FREDERICK COUNTY COMMUNITY HOUSING RESOURCES BOARD, INC. | — | D01623636 | 1983-10-17 | Suspended | FREDERICK |
| FREDERICK COUNTY CONSERVATION FUND, INC | — | D02700912 | 1988-12-30 | Suspended | FREDERICK |
| FREDERICK COUNTY CONSUMER COOPERATIVE, INC | — | D01299882 | 1981-08-07 | Active | FREDERICK |
| FREDERICK COUNTY COUNCIL ON ALCOHOLISM, INC. | — | D00590141 | 1969-04-07 | Suspended | FREDERICK |
| FREDERICK COUNTY CRISIS PREGNANCY CENTER, INC | — | D01585348 | 1983-06-30 | Active | FREDERICK |
| FREDERICK COUNTY DENTAL SOCIETY, INC | — | D00470260 | 1973-09-25 | Active | FREDERICK |
| FREDERICK COUNTY DEVELOPERS, INC. | — | D00446393 | 1973-06-29 | Dissolved | FREDERICK |
| FREDERICK COUNTY EXTENSION ADVISORY COUNCIL, INC | — | D01703123 | 1984-04-17 | Dissolved | FREDERICK |
| FREDERICK COUNTY FARM BUREAU, INC | — | D00104430 | 1947-04-21 | Active | FREDERICK |
| FREDERICK COUNTY FIRE AND RESCUE MUSEUM AND PRESERVATION SOCIETY, INC | — | D06250476 | 2001-04-16 | Active | FREDERICK |
| FREDERICK COUNTY FISH AND GAME PROTECTIVE ASSOCIATION, INCORPORATED | — | D00104448 | 1937-03-19 | Active | FREDERICK |
| FREDERICK COUNTY FOSTER AND ADOPTIVE PARENTS ASSOCIATION INC | — | D11645967 | 2006-11-13 | Active | FREDERICK |