| Pheidole septentrionalis Wheeler, 1908 |
| Pheidole sepultura Longino, 2019 |
| Pheidole setsukoae Wilson, 2003 |
| Pheidole simonsi Wilson, 2003 |
| Pheidole simulans Wheeler, 1908 |
| Pheidole sitarches Wheeler, 1908 |
| Pheidole sitarches subsp. campestris Creighton, 1950 |
| Pheidole sitarches subsp. rufescens Wheeler, 1908 |
| Pheidole sitarches subsp. sitarches Wheeler, 1908 |
| Pheidole sitarches var. transvarians Wheeler, 1908 |
| Pheidole skwarrae Wheeler, 1934 |
| Pheidole smithii DallaTorre, 1892 |
| Pheidole solitanea Wheeler, 1915 |
| Pheidole soritis Wheeler, 1908 |
| Pheidole spadonia Wheeler, 1915 |
| Pheidole spathicornis Wilson, 2003 |
| Pheidole specularis Wilson, 2003 |
| Pheidole striaticeps Mayr, 1870 |
| Pheidole subarmata Mayr, 1884 |
| Pheidole subarmata var. borinquenensis Wheeler, 1908 |