| Formica haematoda Linnaeus, 1758 |
| Formica hamata Fabricius, 1782 |
| Formica harpax Fabricius, 1804 |
| Formica herculeana Linnaeus, 1758 |
| Formica hewitti Wheeler, 1917 |
| Formica imparis Say, 1836 |
| Formica incisa Smith, 1858 |
| Formica insana Buckley, 1866 |
| Formica integroides Wheeler, 1913 |
| Formica laevigata Smith, 1858 |
| Formica lasioides Emery, 1893 |
| Formica lecontei Kennedy & Dennis, 1937 |
| Formica libera Scopoli, 1763 |
| Formica lobata De Geer, 1773 |
| Formica longicornis Latreille, 1802 |
| Formica longipes Jerdon, 1851 |
| Formica lutosa Smith, 1858 |
| Formica maculata Fabricius, 1782 |
| Formica marcida Wheeler, 1913 |
| Formica masonia Buckley, 1866 |