Ziff supported many local and international groups through charitable donations and was a trustee of the Marjorie and Arnold Ziff Charitable Foundation, founded in 1966. She was a life patron of the Leeds Jewish Welfare Board, and an honorary graduate and longstanding friend of the
University of Leeds. Marjorie and her husband Arnold began supporting the
Leeds International Piano Competition in 1981. Marjorie was the President of The Friends of Roundhay Park, a charitable organisation formed in 1994, which is dedicated to the preservation of
Roundhay Park in Leeds. She has also acted as a representative for the
Yorkshire Evening Post in local competitions and award ceremonies.
Buildings On 29 May 1964, her 35th birthday, Marjorie opened
Merrion Centre, Leeds. In 2019, on the 55th anniversary of its opening, she returned there to open a month-long exhibition about the building. The Centre has frequently been used as a location for the local school Variety Club in order to benefit disabled and disadvantaged students. In 2005, the Marjorie and Arnold Ziff Community Centre was opened in
Moortown in recognition of their contributions made to the Jewish community in Leeds. In 2006, the
University of Leeds announced that the Marjorie and Arnold Ziff Building would be funded by a substantial donation from the family foundation and businesses, in memory of Arnold Ziff, who had died in 2004. In 2009, Marjorie opened this building, on her 80th birthday. In 2007, Leeds Art Gallery was refurbished and the Queen's Gallery was renamed the Arnold and Marjorie Ziff Gallery in recognition of their patronage of the arts. In July 2008,
Tropical World in Leeds was renamed
The Arnold and Marjorie Ziff Tropical World to recognise their significant financial contribution. == Personal life and death ==