Here is California, total undergraduate enrollment at the primarily residential UCs is 210,170, according to https://www.universityofcalifornia.edu/infocenter/fall-enrollment-glance . Total undergraduate enrollment at the primarily commuter CSUs is 423,301, according to http://www.calstate.edu/as/stat_reports/2016-2017/f_16toc.shtml .
This does not include students at California community colleges (who are primarily commuter) who will eventually transfer to UC or CSU. Based on transfer numbers (about 32,000 to UC and 58,000 to CSU per year), there are around 90,000 full-time-equivalent transfer-prep students at community colleges per year, or about 180,000 total full-time-equivalent transfer-prep students since it typically takes two years of full time attendance before transfer. Due to part time attendance, the actual number of students currently attending who will eventually transfer is likely to be greater.
Of course, there are also private colleges and universities, many of which are more likely to be residential. However, most of these have small enrollments compared to UCs and CSUs.