NOT A TEACHER
Listen here. The pronunciation is spot-on, so I assume it's "ə".
Most dictionaries I have give the O in Olympics an 'ə' sound as in of.
Is the ou sound as the letter 'O' also correct？
How about the ɔ sound as in off？
why would you think the dictionaries might be wrong? I don't know about US English but in the UK we say 'ə'