| Philonthus nigerrimus Erichson, 1840 |
| Philonthus nobilis Bernhauer, 1910 |
| Philonthus nugax Sharp, 1885 |
| Philonthus ochromerus Sharp, 1885 |
| Philonthus oenotrus Smetana, 1991 |
| Philonthus oklahomensis Hatch & Ortenburger, 1930 |
| Philonthus opacus LeConte, 1863 |
| Philonthus optatus Sharp, 1885 |
| Philonthus orphanus Erichson, 1840 |
| Philonthus ovaticeps Sharp, 1885 |
| Philonthus oxyporinus Sharp, 1885 |
| Philonthus palmatus Sharp, 1885 |
| Philonthus parvimanus Sharp, 1885 |
| Philonthus pauxillus Solsky, 1868 |
| Philonthus peratriceps Scheerpeltz, 1933 |
| Philonthus perplexus Fairmaire & Germain, 1861 |
| Philonthus picatus Kirby, 1837 |
| Philonthus piceatus Nordmann, 1837 |
| Philonthus politus (Linnaeus, 1758) |
| Philonthus pollens Márquez & Asiain, 2010 |