Bendix Hallenstein (c. 24 January 1835 – 6 January 1905) was a merchant, statesman, and manufacturer from Dunedin, New Zealand.
He was born in Bisperode in the Duchy of Brunswick, Germany. The retail chain of clothing stores in New Zealand, Hallensteins, still bears his name. He also founded the D.I.C. (department store) in Dunedin in 1884.
He was the mayor of the Queenstown borough from 1869 to 1872. He represented the electorate of Wakatipu in Parliament from an 1872 to 1873, when he resigned.
Hallenstein's son-in-law (and nephew) Willi Fels was a prominent philanthropist and arts collector in early Dunedin. Hallenstein's great-grandson Charles Brasch was a noted poet, literary editor and arts patron.