Kiukainen
![Location of Kiukainen in Finland](/Images/godic/202501/22/Kiukainen.sijainti.suomi.2008.svg1107.png")
Kiukainen (Swedish:Kiukais) is a former municipality of Finland. It was consolidated with Eura on 1 January 2009.
It is located in the province of Western Finland and is part of the Satakunta region. The municipality had a population of 3,408 (2003) and covered an area of 149.88 km² of which 0.22 km² is water. The population density was 22.7 inhabitants per km².