Ilūkste Municipality (Latvian: Ilūkstes novads) was a municipality in Selonia, Latvia.

In 2009 it absorbed Dviete parish, Eglaine parish and Subate town with its rural area the administrative centre being Ilūkste.

In 2010 the rural area of Subate was reorganised as a separate territorial entity, Prode Parish.

[3] On 1 July 2021, Ilūkste Municipality ceased to exist and its territory was merged into the newly formed Augšdaugava Municipality.

[4] As of 1 January 2010 the ethnic composition of the municipality is as follows:[5]