Salvador Sobral, 27, won with his love ballad Amar Pelos Dois, which was written by his sister.
He said on receiving the trophy: "We live in a world of fast food music. This is a victory for music... music isn't fireworks, music is feeling."
Lucie Jones, representing the UK with I'll Never Give Up on You, came 15th. Bulgaria came second and Moldova third.
The contest this year took place in the Kiev International Exhibition Centre in Ukraine. The host country could only manage 24th place out of 26 this time round.
Portugal will now host the contest next year.
(Excerpts from BBC News)