Which Classes Fill Up Fastest at College of San Mateo?
In Fall 2026, 59% of CSM’s 912 class sections filled up. The classes most likely to be full were CHEM 210, COMM 110 and BIOL 250.
At their longest, waitlists across CSM’s sections added up to 2,785 spots.
Online sections filled more often than in-person ones: 51% of in-person sections vs 72% of online sections.
The 30 classes that fill up fastest at CSM
- 7 of 7 sections full · 139 on waitlists
- 19 of 19 sections full · 106 on waitlists
- 4 of 4 sections full · 88 on waitlists
- 9 of 9 sections full · 73 on waitlists
- 9 of 9 sections full · 63 on waitlists
- 4 of 4 sections full · 63 on waitlists
- 3 of 3 sections full · 52 on waitlists
- 7 of 7 sections full · 50 on waitlists
- 4 of 4 sections full · 50 on waitlists
- 2 of 2 sections full · 50 on waitlists
- 4 of 4 sections full · 48 on waitlists
- 3 of 3 sections full · 47 on waitlists
- 4 of 4 sections full · 34 on waitlists
- 7 of 7 sections full · 32 on waitlists
- 3 of 3 sections full · 32 on waitlists
- 2 of 2 sections full · 27 on waitlists
- 4 of 4 sections full · 25 on waitlists
- 4 of 4 sections full · 24 on waitlists
- 5 of 5 sections full · 22 on waitlists
- 3 of 3 sections full · 22 on waitlists
- 5 of 5 sections full · 20 on waitlists
- 3 of 3 sections full · 20 on waitlists
- 2 of 2 sections full · 20 on waitlists
- 2 of 2 sections full · 20 on waitlists
- 3 of 3 sections full · 19 on waitlists
- 5 of 5 sections full · 18 on waitlists
- 3 of 3 sections full · 18 on waitlists
- 4 of 4 sections full · 17 on waitlists
- 4 of 4 sections full · 16 on waitlists
- 3 of 3 sections full · 16 on waitlists
Only classes with two or more sections are ranked. The waitlist number adds up each section’s waitlist at its longest, so a student waiting on two sections counts twice.
How we measured this
We checked every section in CSM’s Fall 2026 class schedule repeatedly from Monday, June 29, 2026 to Wednesday, October 14, 2026. A section counts as full if any check found its enrollment at the seat limit or anyone on its waitlist. Cancelled sections and sections without a seat limit are left out. Classes that filled before our first check still count, because they were still full when we looked.
Questions students ask
What classes fill up fast at CSM?
In Fall 2026, the classes most likely to be full at CSM were CHEM 210 (General Chemistry I), COMM 110 (Public Speaking), BIOL 250 (Human Anatomy), ETHN 101 (Latin Amer History and Cult.) and FILM 100 (Introduction to Film). Overall, 59% of CSM’s class sections filled up.
How do I get into a full class at CSM?
Get on the waitlist as soon as you can, check your email through the first week for a permission number or add code, and go to the first class meeting. Instructors often add waitlisted students who show up, as other students drop.
When should I register at CSM to get the classes I need?
At your registration appointment, the first minute it opens. Spring 2027 registration at CSM opens Wednesday, November 11, 2026 for continuing students. Have a backup section picked for every class on this list.
Not sure which classes to register for? On our platform, put in CSM and the university you want to transfer to, and you get the classes you need, semester by semester. Build your class plan.