The Ivorian spent eight years at Stamford Bridge, departing in 2012 after making the difference in the Blues' Champions League final triumph against Bayern Munich, but is available again after deciding to leave Galatasaray.
Though he is now 36, Mourinho believes that he could still be devastating in the Premier League.
"We think about it," the Portuguese told reporters after being asked about Drogba's possible return.
"We want to win matches and win titles and Didier is one of the best strikers in Europe. He is still very adapted to the needs of the Premier League and we are thinking about it in a non-emotional way.