Võivaku is a village in Põhja-Sakala Parish, Viljandi County, located north of the town of Viljandi, north of the small borough of Olustvere and southwest of the town of Suure-Jaani.travelingluck.com Retrieved 24 January 2016. The population of Võivaku as of 2015 was 101,suure-jaani.ee Võivaku küla. Retrieved 24 January 2016. a decrease from 106 in the 2000 census.citypopulation.de Retrieved 24 January 2016.
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