| Formica fusca var. subpolita Mayr, 1886 |
| Formica glebaria Nylander, 1846 |
| Formica gnava Buckley, 1866 |
| Formica gracilescens Nylander, 1856 |
| Formica gracilipes Smith, 1857 |
| Formica gracilis Fabricius, 1804 |
| Formica grossa Fabricius, 1787 |
| 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 |