| Microtus californicus (Peale, 1848) |
| Microtus californicus subsp. aequivocatus Osgood, 1928 |
| Microtus californicus subsp. grinnelli Huey, 1931 |
| Microtus californicus subsp. huperuthrus Elliot, 1903 |
| Microtus californicus subsp. hyperythrus Elliot, 1903 |
| Microtus californicus subsp. perplexabilis Grinnell, 1926 |
| Microtus drummondii (Audubon & Bachman, 1854) |
| 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 |