Margaretha Wilhelmina Francina (Mienke) Simon Thomas (born 1954) is a Dutch art historian, curator and author, working as a senior curator at Museum Boijmans Van Beuningen in Rotterdam.

She participated in the Industry & Design exhibition at the Stedelijk Museum in Amsterdam from 1985 to 1986.

[2] in 1986 she published a book about the furniture designer Cornelis van der Sluys.

[3] In 1993 Simon Thomas started as a curator at Museum Boijmans van Beuningen, where she grew to be the main curator as successor of Thimo te Duits.

For example, she wrote general books about the Dutch packaging industry, Art Deco in the Netherlands, and some biographical works about designers such as Jaap Gidding, Jacob Jongert and Johan Thorn Prikker.