Largest US Colleges and Universities by Enrollment

The US Dept of Education's IPEDS (Integrated Post-secondary Education Data System) contains information on all 7,000+ officially-recognized institutions of higher education in the United States. We present a list of the 20 largest institutions of higher education by "12-month unduplicated headcount," meaning it is the number of unique individuals who enrolled in at least one class during the 12 months of 2009. Whether a system of individual campuses is counted as one or multiple institutions depends on how that institution is accredited and chartered. All data can be verified on the IPEDS system website.

12 month unduplicated enrollment, 2009
Ranking	College	Location	Enrollment
1	University of Phoenix	Online Campus	532,672
2	Comm College of the Air Force	Multiple Campuses	324,573
3	Kaplan University	Multiple Campuses	96,166
4	Miami Dade College	Miami, Florida	96,123
5	Houston Community College	Houston, Texas	78,780
6	Ashford University	Multiple Campuses (Headquarters in Clinton, Iowa)	78,353
7	Arizona State University	Phoenix Metropolitan Area, Arizona	75,341
8	Strayer University	Washington, DC	74,713
9	Lone Star College System	The Woodlands, Texas	69,340
10	Northern Va Comm College	Annandale, Virginia	67,175
11	University of Minnesota, Twin Cities	Minneapolis/St. Paul, Minnesota	65,006
12	Austin Community College District	Austin, Texas	64,276
13	Ohio State University	Columbus, Ohio	62,807
14	Tarrant County College District	Fort Worth, Texas	62,488
15	College of Southern Nevada	Las Vegas, Nevada	59,691
16	University of Florida	Gainesville, Florida	59,614
17	University of Central Florida	Orlando, Florida	59,360
18	American River College	Sacramento, California	57,959
19	Pima Community College	Tucson, Arizona	57,924
20	East Los Angeles College	Los Angeles, California	57,340