 Most of the population () speaks German (92.8%), with Albanian being second most common ( 2.7%) and Italian being third ( 1.1%).The age distribution, , in Wittnau is; 99 children or 8.8% of the population are between 0 and 9 years old and 191 teenagers or 17.0% are between 10 and 19.Of the adult population, 122 people or 10.9% of the population are between 20 and 29 years old.