Ilbank A.Ş., short for İller Bankası Anonim Şirketi, is a state-owned development and investment bank based in Ankara, Turkey.

[5][6][7] İlbank was founded on 11 June 1933 under the name "Belediyeler Bankası"(in Eng:"Bank of Municipalities") according to law numbered 2301.

Afterwards, the name of the bank was changed to "İller Bankası" on July 27, 1944, amid debates during the Budget Committee due to the fact that Special Provincial Administrations and villages were out of the scope of loans and assistance, along with increasing urbanization in conjunction with rapid population growth that created more demand on funds.

İller Bankası, including Special Provincial Administrations and villages, was formally established on June 13, 1945, with law number 4759.

İlbank's organizational status was then transformed to an incorporated company with the Law #6107 enacted on January 26, 2011.