Yes, it is.
Is boxing considered a sport?
Yes. Sting like a bee, float like a butterfly that's me Muhammad Ali.
Yes, I consider it a sport and it's an Olympic sport but there are always some that disagree on it being a sport. I disagree with them !
Professional boxing is not a sport. It's an exhibition, having more in common with professional wrestling than legitimate sports.
Boxing had a rich history with technical art of fighting sports. Compared to mixed martial arts & same sort of sports, boxing is a pure combat fight sport. It has a huge following worldwide and the most interesting contest in Olympics. People loves it!!! So for me it is a pure sport activity which not only gives you entertainment but also offer you a lot of fitness.