I did a search on the site listed above. Here are schools that have a minimum of 50 self-reported Orthodox students: University of Pennsylvania
New York University
Columbia / Barnard
Brandeis
University of Maryland - College Park
Rutgers University
Cornell University
CUNY - Queens College
SUNY Binghamton
University of Michigan
Boston University
Cooper Union
University of California - Los Angeles
Harvard
Yeshiva University
McGill
York
UMass - Amherst
University of Toronto
Stern College for Women
CUNY - Brooklyn
The 50 number was arbitrary, but I feel that any campus with numbers below that would not have a real sense of community for an Orthodox student. Muhlenberg has 10 Orthodox students reported. Goucher even fewer. To me, that indicates that it is not a real community and in any year can disappear.