Armchair may also refer to:
- Armchair nanotube, a carbon nanotube with chiral symmetry
- Armchair, a sitting sex position
- Armchair (bus company), a bus operator in London
- "Armchair", a song by Avail from their 1996 album 4am Friday
- "Armchairs", a song by Andrew Bird from his 2007 album Armchair Apocrypha
- Armchair, a pejorative modifier to refer to a person who experiences something vicariously rather than first-hand, or to a casual critic who lacks practical experience, in phrases such as armchair revolutionary, armchair general, armchair lawyer, armchair meteorologist,armchair quarterback, armchair architect armchair warrior and so on