re: List of university campus carillons / bell towers in North America.

Check this map out. click on north america box and then specific state boxes to zoom in on those states.
LINK

if you think a building has a carillon,but it is not on that map, then it is probably an electronic carillon which doesn't have real bells. An example is Samford Hall's clocktower at Auburn. Electronic carillons mimic the sounds of bells and in some cases use the sounds of taped bells.

That map will show both traditional, and non-traditional carillons that have electric keyboards, as well as other small bell instruments like chimes.