Quaternary education or fourth-stage education (known in British English as postgraduate education), is the educational level following the completion of an undergraduate degree at a college or university. Graduate school is an examples of quaternary education; some consider postdoctoral positions to be quaternary education while others consider them to be jobs.

See also

• Primary education -- Secondary education -- Tertiary education -- Quaternary education
• Graduate student

• Education by country
• List of colleges and universities by country