| Thecla hewitsoni Kirby, 1871 |
| Thecla hicetas Godman & Salvin, 1887 |
| Thecla hisbon Godman & Salvin, 1887 |
| Thecla humuli Harris, 1841 |
| Thecla hyperici Boisduval & LeConte, 1835 |
| Thecla hypocrita Schaus, 1913 |
| Thecla hypoliodes Hayward, 1967 |
| Thecla ilavia Beutenmüller, 1899 |
| Thecla imma Prittwitz, 1865 |
| Thecla inconspicua Lathy, 1930 |
| Thecla ines Edwards, 1882 |
| Thecla infrequens Weeks, 1901 |
| Thecla inoa Godman & Salvin, 1887 |
| Thecla insignis Godman & Salvin, 1887 |
| Thecla iopas Godman & Salvin, 1887 |
| Thecla ira Hewitson, 1867 |
| Thecla iroides Boisduval, 1852 |
| Thecla iroides var. immaculata Cockle, 1910 |
| Thecla istapa Reakirt, 1867 |
| Thecla itys Edwards, 1882 |