Is Smaug the Last Dragon?

Smaug was the last named dragon of Middle-earth. He was slain by Bard, a descendant of Girion, Lord of Dale.

Are there any dragons after Smaug?

It is presumed that, after the death of Smaug in the Third Age, the great dragons had become extinct. According to Gandalf, the fire-drake race survived until at least just before the War of the Ring, and some lesser kin survived even after the war.

Was Smaug, the strongest dragon?

10 Smaug is Not The Strongest Dragon

Yet, he is not the strongest in its history. That title falls to Ancalagon the Black, the largest dragon ever to have existed in Middle-earth. He was bred by Morgoth during the First Age to fight for the Dark Lord during his campaign of terror.