Fritz Henßler (12 April 1886 – 4 December 1953) was a German Social Democratic politician.
He joined the Social Democratic Party of Germany (SPD) in 1905.
He became managing editor of the Westfälische Allgemeine Volkszeitung, the Social Democratic party organ in the Westphalia region.
However, instead of being released after one year, Henßler was sent to Sachsenhausen concentration camp in 1937, where he was interned until 1945.
From 1946 to 1953 he was chairman of the SPD group in the state parliament of Northrhine-Westphalia and at the same time Mayor of Dortmund.