Dumlupınar is a town in Kütahya Province in the Aegean region of Turkey. It is the seat of Dumlupınar District. Its population is 1,214. It was the …Dumlupınar is a town in Kütahya Province in the Aegean region of Turkey. It is the seat of Dumlupınar District. Its population is 1,214. It was the site of the 1922 Battle of Dumlupınar.