Kaasiku
Kaasiku may refer to several places in Estonia:

Kaasiku, Harju County, village in Kernu Parish, Harju County
Kaasiku, Hiiu County, village in Hiiumaa Parish, Hiiu County
Kaasiku, Jõgeva County, village in Mustvee Parish, Jõgeva County
Kaasiku, Lääne County, village in Lääne-Nigula Parish, Lääne County