The Scottish champions were punished after fans set off fireworks during their Europa League draw against Fenerbahce in Turkey and for "improper conduct of the team".
The latter charge is automatically triggered when a team receives five yellow cards in a European match, which happened to Celtic during the 1-1 draw on December 10
UEFA announced the 13,000 euros punishment on Tuesday following a meeting of their control, ethics and disciplinary body.
Source: PA