| Frederick County Government Offices Close at noon | 12/24/2025 12:00 PM |
| Frederick County Electoral Board Meeting | 03/28/2024 8:00 AM - 11:00 AM |
| Frederick County Electoral Board Meeting | 03/07/2023 4:30 PM - 6:00 PM |
| Frederick County Electoral Board Meeting | 09/09/2025 9:00 AM - 11:00 AM |
| Frederick County Electoral Board Meeting | 03/04/2025 9:00 AM - 11:00 AM |
| Frederick County Economic Development Authority: moved to Nov. 10 meeting | 11/03/2016 8:00 AM - 10:00 AM |
| Frederick County Economic Development Authority: moved from Nov. 3 meeting | 11/10/2016 8:00 AM - 9:00 AM |
| Frederick County Economic Development Authority: moved from May 4 | 05/11/2017 8:00 AM - 8:30 AM |
| Frederick County Economic Development Authority: canceled | 04/13/2017 8:00 AM - 9:00 AM |
| Frederick County Economic Development Authority: canceled | 10/05/2017 8:00 AM - 8:30 AM |
| Frederick County Economic Development Authority: canceled | 04/06/2017 8:00 AM - 8:30 AM |
| Frederick County Economic Development Authority meeting: moved to October 10 | 10/03/2019 8:00 AM - 9:00 AM |
| Frederick County Economic Development Authority meeting: moved to July 12 | 07/05/2018 8:00 AM - 9:00 AM |
| Frederick County Economic Development Authority meeting: moved to 5/9 | 05/02/2019 8:00 AM - 9:00 AM |
| Frederick County Economic Development Authority meeting: moved from October 4 | 10/11/2018 8:00 AM - 9:00 AM |
| Frederick County Economic Development Authority meeting: moved from October 3 | 10/10/2019 8:00 AM - 9:00 AM |
| Frederick County Economic Development Authority meeting: moved from July 5 | 07/12/2018 8:00 AM |
| Frederick County Economic Development Authority meeting: moved from 5/2 | 05/09/2019 8:00 AM - 9:30 AM |
| Frederick County Economic Development Authority meeting: canceled | 02/07/2019 8:00 AM - 9:00 AM |
| Frederick County Economic Development Authority meeting: canceled | 06/07/2018 8:00 AM - 9:00 AM |