Hans Kalm (21 April 1889 – 1 February 1981) was an Estonian soldier who served in the armies of Russian Empire, Finland and Estonia.

According to a family legend, one of Kalm's forefathers survived the Black Death by hiding in a remote cemetery island and therefore changed his name.

In the 1918 Finnish Civil War he led a battalion mostly composed of the students of two park ranger colleges from Ähtäri and Evo.

[1] Kalm's battalion became infamous in March as they attacked a Red Guard sanatorium in the village of Harmoinen in Kuhmoinen municipality, killing 11 wounded soldiers and two nurses.

[4] Kalm resigned from the White Army in July 1918 and left for Estonia, where he became the commander of the Pohjan Pojat regiment fighting in the Estonian War of Independence.