| Formica trifasciata Smith, 1858 |
| Formica tristis Christ, 1791 |
| Formica truncicola Nylander, 1846 |
| Formica truncicola subsp. integroides Wheeler, 1913 |
| Formica tuberculata Olivier, 1792 |
| Formica umbrata Nylander, 1846 |
| Formica vagans Olivier, 1792 |
| Formica vetula Wheeler, 1912 |
| Formica villosa Fabricius, 1804 |
| Formica visitatrix Christ, 1791 |
| Formica vividula Nylander, 1846 |
| Formica vorax Fabricius, 1804 |
| Formica wichita Buckley, 1866 |
| Formica xerophila Smith, 1939 |
| Formicidae Latreille, 1809 |
| Formicina Swainson & Shuckard, 1840 |
| Formicina belgarum Bondroit, 1918 |
| Formicinae Latreille, 1809 |
| Formicini Latreille, 1809 |
| Formicoxenini Forel, 1893 |