U of Phoenix-Online Campus is first with 47,660.

Incidentally, both have their top Doctoral major in education.

beat NYU (22,018), USC (21,642), Columbia (18,657), and U of Minnesota-Twin Cities (17,384), and others, ending with Occidental College (1).

1,906 out of the other 3,121 colleges were ruled out due to missing, unknown, or not-applicable values for grad students, e.g., Boston Univ.

1. Information on numbers and ages of the undergrad and graduate student body is from the file enrollment by age, gender, attendance status, and level of student: Fall 2012 (Provisional release) as reported by the National Center for Education Statistics (http://nces.ed.gov/ipeds).
   

Walden Univ is in Minneapolis, MN, is private and for-profit, open admission, research intensive, has a nursing major, has its top Doctoral major in education, has its top Masters major in education, has its top major in business, is on the semester system, and enrolls 20,000 or more students.

• PayScale mid-career median salary ranking (452nd place)
• average full-time teaching salary ($69,085)
• in-state undergrad tuition & fees ($11,010)
• out-of-state undergrad tuition & fees ($11,010)
• average grant aid to undergrads ($2,576)
• endowment per full-time student ($0)
• undergrads who get financial aid (100%)
• full-time retention rate (100%)
• undergrads who are 25 years or older (88%)
• minorities (43.9%)
• Blacks or African Americans (36.4%)
• undergrads among full-time students (17.3%)
• foreign students (5.6%)
• Hispanics (4.9%)
• grad students who are under 25 years old (2.8%)
• Asians (2%)
• in-state freshmen (1.2%)
• American Indians or Alaska Natives (0.6%)
• average teaching salary differential (men vs. women, 0.2%)
• non-resident tuition & fees surcharge (0%)
• undergrads who get Pell grants (0%)
• undergrads who receive student loans (0%)
• average teaching salary differential (women vs. men, -0.2%)
• tuition & fees increase over three years (-9.3%)
• alumni who played in the National Football League (0)
• average January temperature (16.0 degrees)
• foreign students (4,213)
• full-time grad students (29,710)
• full-time undergrads (887)
• grad students (41,513)
• members of the National Academy of Sciences (0)
• men's basketball Final Four appearances (0)
• Rhodes Scholar alumni (0)
• undergrads (8,696)
• yearly for-credit students (75,895)
• on-campus yearly property crimes per thousand students (0)
• students per faculty member (20)
• annual rainfall (32.8 inches)
• diversity and inclusion ratio (0.03)
• elevation (257 meters)

Sources