Mille-Marie Treschow (3 April 1954 – 29 September 2018) was a Norwegian landlord and businessperson.

She was known for her previous marriage to Stein Erik Hagen, well known as "Rimi-Hagen", being the former owner of the Rimi chain of low-cost discount stores.

She belonged to the Treschow family, which was formerly noble, having bought the status of untitled lower nobility (cf.

Treschow had an estimated private fortune of 1.5 billion Norwegian kroner (NOK) or about US$250 million.

Treschow died aged 64 on 29 September 2018 at Tønsberg hospital of an undisclosed illness.