 Most of the population () speaks German (98.2%), with Finnish being second most common ( 0.8%) and Italian being third ( 0.3%).Of the Swiss national languages (), 391 speak German, 1 person speaks, Italian,

The age distribution, , in Stein is; 61 children or 15.3% of the population are between 0 and 9 years old and 56 teenagers or 14.1% are between 10 and 19.Of the adult population, 38 people or 9.5% of the population are between 20 and 29 years old.