Altıeylül is a municipality and district of Balıkesir Province, Turkey.

[1] The district was established in 2012, when Balıkesir Province was declared a metropolitan municipality as a part of the 2013 Turkish local government reorganisation (Law no.

Altıeylül was created out of the former Balıkesir central district, along with Karesi.

[4][5] The name Altıeylül means "6 September", which was the date of recovery of Balıkesir during the Turkish War of Independence in 1922.

There are 94 neighbourhoods in Altıeylül District:[6]