| Philonthus semiruber Horn, 1884 |
| Philonthus sericans (Gravenhorst, 1802) |
| Philonthus serpens Sharp, 1885 |
| Philonthus silvestris Bernhauer, 1929 |
| Philonthus sobrinus Erichson, 1840 |
| Philonthus solitarius Sharp, 1885 |
| Philonthus speculicollis Schubert, 1909 |
| Philonthus sulcicollis LeConte, 1863 |
| Philonthus suspectus Erichson, 1840 |
| Philonthus tachiniformis (Say, 1830) |
| Philonthus terminalis LeConte, 1863 |
| Philonthus testaceipennis Erichson, 1840 |
| Philonthus tetragonocephalus Notman, 1924 |
| Philonthus thermarum Aubé, 1850 |
| Philonthus triangulum Horn, 1884 |
| Philonthus trochanterinus Sharp, 1885 |
| Philonthus umbratus Sharp, 1885 |
| Philonthus umbripennis LeConte, 1863 |
| Philonthus vagepunctatus Schubert, 1909 |
| Philonthus varicolor Boheman, 1858 |