8O

8O or 8-O could refer to:

• 8O, IATA code for West Coast Air
• 8º (also 8o), an abbreviation in bookbinding for Octavo
• 8º, an abbreviation for eighth in some languages
• 8º TAP Rallye de Portugal; see 1974 Rallye de Portugal
• Oxygen (₈O), a chemical element