| Leptothorax peninsularis Wheeler, 1934 |
| Leptothorax pergandei Emery, 1895 |
| Leptothorax petiolatus Forel, 1901 |
| Leptothorax pilifer Roger, 1863 |
| Leptothorax pittieri Forel, 1899 |
| Leptothorax punctaticeps Mackay, 2000 |
| Leptothorax punctatissimus Mackay, 2000 |
| Leptothorax punctithorax Mackay, 2000 |
| Leptothorax pungentinodis Emery, 1896 |
| Leptothorax rugatulus Emery, 1895 |
| Leptothorax rugithorax Mackay, 2000 |
| Leptothorax rugulosus Mackay, 2000 |
| Leptothorax schmittii Wheeler, 1903 |
| Leptothorax skwarrae Wheeler, 1931 |
| Leptothorax striatulus Stitz, 1937 |
| Leptothorax subditivus Wheeler, 1903 |
| Leptothorax tenuisculptus Baroni Urbani, 1978 |
| Leptothorax terrigena Wheeler, 1903 |
| Leptothorax texanus Wheeler, 1903 |
| Leptothorax tonsuratus Kempf, 1959 |