Joanne Creighton, President of Mt. Holyoke College, wrote an article "Why We Need Women's Colleges". An excerpt:
"Women's colleges are not about separating women from the world but about encouraging them to be active agents within it. Although the colleges educate a tiny percentage of women students, their graduates are overrepresented in positions of influence. Prominent women's college alumnae have filled both sides of the aisle on Capitol Hill in recent years and include Hillary Clinton, Nancy Pelosi, Elaine Chao, Madeline Albright, Donna Shalala, and Christine Todd Whitman. Four of the 10 women CEOs of Fortune 500 companies in 2006 graduated from women's colleges.
Dishearteningly, so few women are at the top: they fill only 2 percent of CEO positions and 14.7 percent of board seats on Fortune 500 companies; 21 percent of college and university presidencies; 14 percent of senators and 16 percent of members of the House. In fact, the United States ranks 69th in the world in terms of women's representation in national legislatures or parliaments out of 187 countries. Four decades after the Equal Pay Act, women earn on average 77 cents of every dollar of their male counterparts."
Here's a list of women's colleges in the U.S. and Canada:
links verified 4/2013