| Microtus drummondii subsp. chihuahuensis Bradley & Cockrum, 1968 |
| Microtus fulviventer Merriam, 1898 |
| Microtus guatemalensis Merriam, 1898 |
| Microtus mexicanus (Saussure, 1861) |
| Microtus mexicanus subsp. fulviventer Merriam, 1898 |
| Microtus mexicanus subsp. fundatus Hall, 1948 |
| Microtus mexicanus subsp. madrensis Goldman, 1938 |
| Microtus mexicanus subsp. mexicanus (Saussure, 1861) |
| Microtus mexicanus subsp. neveriae Hooper, 1955 |
| Microtus mexicanus subsp. ocotensis Álvarez & Hernández-Chávez, 1993 |
| Microtus mexicanus subsp. phaeus (Merriam, 1892) |
| Microtus mexicanus subsp. salvus Hall, 1948 |
| Microtus mexicanus subsp. subsimus Goldman, 1938 |
| Microtus oaxacensis Goodwin, 1966 |
| Microtus pennsylvanicus (Ord, 1815) |
| Microtus pennsylvanicus subsp. chihuahuensis Bradley & Cockrum, 1968 |
| Microtus phaeus Merriam, 1892 |
| Microtus quasiater (Coues, 1874) |
| Microtus umbrosus Merriam, 1898 |
| Nelsonia Merriam, 1897 |