Willi Jentzsch (15 May 1886 in Wolfen – 23 May 1936 in the Free City of Danzig) was a German teacher, school administrator and politician.
On 1 November 1927, he was appointed rector of the renowned Gymnasium St. Johann in Fleischergasse.
Jentzsch married Gertrud Alma Drange in 1921 in Danzig.
She was the daughter of Emil Drange, who made career in the administration of the Eastern Prussian city of Elbing, and his wife Emma (née Wachs).
After the death of Willi Jentzsch in 1936, his family relocated to Hamburg.