The Board of Supervisors approved the 2021 Hardin County Holidays list at the organizational meeting on Monday, January 4, 2021.
| Holiday | Date County Offices Will be Closed to Observe Holiday |
| Martin Luther King, Jr.'s Birthday | January 18, 2021
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| Memorial Day | May 31, 2021
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| Independence Day | July 5, 2021 |
| Labor Day | September 6, 2021 |
| Veterans Day | November 11, 2021 |
| Thanksgiving | November 25 & 26, 2021 |
| Christmas | December 23 & 24, 2021 |
| New Year's Day | December 31, 2021 |
