does anyone know of any online colleges that dont ask for ssn in the us
You can leave the SSN field blank. Lots of college applicants don’t have a SSN for completely legitimate reasons. E.g. international students who are planning to attend on a student visa.
If a college didn’t ask for a SSN from any applicant, I would be worried that they are a scam and their degrees worthless. Colleges need SSNs to process applications for federal financial aid, for example.
If you are looking for a place to take a few online classes without the intention of earning college credits or a college degree, you can take a look at websites like Udemy or Coursera.