Helfrich Bernhard Wenck (19 June 1739 – 27 April 1803) was a German historian and educator born in Idstein, Hesse.
From 1761 until his death he was associated with the Darmstadt Pädagogium, Here he was appointed prorector in 1769, worked as an historiographer (from 1775) and later attained the position of Consistorialrath (1778).
His best known publication was a work on Hessian history called Hessische Landesgeschichte, which was published in three volumes between 1783 and 1803. Another noted work of his was Lateinische Grammatik für Schulen (Latin Grammar for Schools), which was later revised in 1823 by Georg Friedrich Grotefend (1775-1853).