Statistics from the National Association of Women Business Owners (NAWBO)

Women Owned Business in the United States

10.1 million firms are owned by women (50% or more), employing more than 13 million people, and generating $1.9 trillion in sales as of 2008.
Three quarters of all women-owned businesses are majority owned by women (51% or more), for a total of 7.2 million firms, employing 7.3 million people, and generating $1.1 trillion in sales.
Women-owned firms (50% or more) account for 40% of all privately held firms.