The 20 US colleges with the most liberal students

As part of its annual college ranking, The Princeton Review ranks the US colleges with the most liberal students.

While not everyone at these liberal schools are Birkenstock-wearing, tree-hugging, clove smoking vegetarians, these campuses are home to some of the most left-of-the-spectrum students in the country.

These schools also often make The Princeton Review's lists that rank the most politically active students, the most LGBT-friendly students, and students who are the least interested in sports.

Every school on the list is a small liberal arts college with an average undergraduate enrollment of 1,613 students among the 20 colleges. Only five schools on the list are from the south and midwest combined, while the remaining 75 percent are located in the northeast, pacific northwest, and California - typically blue states.

From northern New England to southern California, here are the most liberal schools in the US:

1. Sarah Lawrence College - Bronxville, New York
2. Warren Wilson College - Asheville, North Carolina
3. Bennington College - Bennington, Vermont
4. Bard College - Annandale-on-Hudson, NY
5. Marlboro College - Marlboro, Vermont
6. College of the Atlantic - Bar Harbor, Maine
7. Beloit College - Beloit, Wisconsin
8. Reed College - Portland, Oregon
9. New College of Florida - Sarasota, Florida
10. Smith College - Northampton, Massachusetts
11. Macalester College - St. Paul, Minnesota
12. Skidmore College - Saratoga Springs, New York
13. Grinnell College - Grinnell, Iowa
14. Pitzer College - Claremont, California
15. Mills College - Oakland, California
16. Vassar College - Poughkeepsie, New York
17. Occidental College - Los Angeles, California
18. The Evergreen State College - Olympia, Washington
19. Lewis & Clark College - Portland, Oregon
20. Swarthmore College - Swarthmore, Pennsylvania