Helga Maria Swarts, known as Moa Martinson, (2 November 1890, Vårdnäs - 5 August 1964) was a Swedish author.

Helga's ambitions as a writer was to change the society and with her authorship portray the conditions of the working-class but also the personal development of women. In her work she wrote about: motherhood, love, poverty, politic, religion, urbanization and the hard living conditions of the working class woman.