Diethelm V, Count of Toggenburg

Diethelm V von Toggenburg (died 1337) ruled as Count of Toggenburg from 1315, when his father Frederick IV fell fighting the Swiss at the Battle of Morgarten.

Around 1324 he married Adelheid, daughter of Lütold von Griessenberg, who bore him two daughters. On 21 September 1337 he was killed at the Battle of Grynau, fighting in a noble coalition against the imperial city of Zurich.