| Age | President | First Inauguration Date |
| 42 years, 10 months, 18 days | |
| 43 years, 7 months, 22 days | |
| 46 years, 5 months, 1 day | |
| 46 years, 10 months, 5 days | |
| 47 years, 5 months, 16 days | |
| 47 years, 11 months, 14 days | |
| 48 years, 3 months, 9 days | |
| 49 years, 3 months, 13 days | |
| 49 years, 4 months, 2 days | |
| 50 years, 6 months, 2 days | |
| 51 years, 0 months, 6 days | |
| 51 years, 0 months, 29 days | |
| 51 years, 1 month, 4 days | |
| 51 years, 5 months, 17 days | |
| 51 years, 11 months, 14 days | |
| 52 years, 0 months, 20 days | |
| 52 years, 3 months, 19 days | |
| 54 years, 1 month, 4 days | |
| 54 years, 2 months, 27 days | |
| 54 years, 5 months, 0 days | |
| 54 years, 6 months, 14 days | |
| 54 years, 6 months, 22 days | |
| | Age | President | First Inauguration Date |
| 55 years, 2 months, 26 days | |
| 55 years, 4 months, 2 days | |
| 55 years, 6 months, 12 days | |
| 56 years, 0 months, 11 days | |
| 56 years, 2 months, 4 days | |
| 56 years, 3 months, 17 days | |
| 57 years, 2 months, 8 days | |
| 57 years, 7 months, 21 days | |
| 57 years, 10 months, 19 days | |
| 57 years, 11 months, 16 days | |
| 58 years 10 months, 4 days | |
| 60 years, 11 months, 4 days | |
| 61 years, 0 months, 26 days | |
| 61 years, 4 months, 4 days | |
| 61 years, 11 months, 17 days | |
| 62 years, 3 months, 6 days | |
| 64 years, 3 months, 8 days | |
| 64 years, 7 months, 8 days | |
| 65 years, 10 months, 9 days | |
| 68 years, 0 months, 23 days | |
| 69 years, 11 months, 14 days | |
|