Hemishofen has a population () of 415, of which 11.8% are foreign nationals. Of the foreign population, (), 56.3% are from Germany, 8.3% are from Italy, 2.1% are from Croatia, and 33.3% are from another country. Over the last 10 years the population has grown at a rate of 19.6%. Most of the population () speaks German (97.9%), with French being second most common ( 0.8%) and English being third ( 0.5%). The age distribution of the population () is children and teenagers (0–19 years old) make up 23.6% of the population, while adults (20–64 years old) make up 56.1% and seniors (over 64 years old) make up 20.2%.