| Agaricus rutilus Schaeff., 1774 |
| Agaricus scrobiculatus Scop., 1772 |
| Agaricus semotus Fr., 1863 |
| Agaricus silvaticus Schaeff., 1774 |
| Agaricus solidipes Peck, 1872 |
| Agaricus soloniensis Dubois, 1803 |
| Agaricus squamulosus Pers., 1801 |
| Agaricus subdulcis Pers., 1801 |
| Agaricus subdulcis var. camphoratus (Bull.) Fr., 1821 |
| Agaricus subperonatus (J. E. Lange) Singer, 1951 |
| Agaricus subrufescens Peck, 1893 |
| Agaricus subrutilescens (Kauffman) Hotson & D. E. Stuntz, 1938 |
| Agaricus subsquamosus (L.) Lam., 1783 |
| Agaricus sylvicola (Vittad.) Peck, 1872 |
| Agaricus testaceus Scop., 1772 |
| Agaricus testaceus var. aurantiacus Pers., 1801 |
| Agaricus texensis Berk. & M. A. Curtis, 1853 |
| Agaricus theiogalus Bull., 1793 |
| Agaricus tlaxcalensis Callac & G. Mata, 2008 |
| Agaricus tollocanensis Callac & G. Mata, 2004 |