Iłownica [iwɔvˈnit͡sa] is a village in Gmina Jasienica, Bielsko County, Silesian Voivodeship, southern Poland.

[2] The village was first mentioned in a Latin document of the Diocese of Wrocław called Liber fundationis episcopatus Vratislaviensis from around 1305 as item in Gylownita.

The creation of the village was a part of a larger settlement campaign taking place in the late 13th century on the territory of what would be later known as Upper Silesia.

Politically the village belonged initially to the Duchy of Teschen, formed in 1290 in the process of feudal fragmentation of Poland and was ruled by a local branch of the Piast dynasty.

According to the censuses conducted in 1880, 1890, 1900 and 1910 the population of the municipality grew from 707 in 1880 to 744 in 1910, with a majority being native Polish-speakers (99.1%-99.9%) accompanied by a few German-speaking people (at most 7, or 0.9%, in 1910).