* Specific CSU: Each of the 23 CSUs sets its own tuition and fees.
* Residency status: Tuition is significantly cheaper for California residents than for out-of-state students.
* Enrollment status: Tuition rates may differ slightly for undergraduate vs. graduate students.
* Fees: In addition to tuition, there are various mandatory fees (student fees, campus fees, etc.) that vary by campus and sometimes by program.
To find the cost per credit hour for a *specific* CSU, you need to visit that university's website and look for their tuition and fees information for the relevant academic year. Usually, this information is readily available under a section like "Student Accounts," "Tuition & Fees," or "Financial Aid."