Marta Vergara Varas (2 January 1898 – 1995) was a Chilean author, editor, journalist and women's rights activist.

She pushed Doris Stevens to broaden the scope of international feminism to include working women's issues in the quest for equality.

[4] By the late 1920s, Vergara was working as a journalist and in 1927 when Carlos Ibáñez del Campo began his leadership after the coup d'état, she fled to Europe.

[6] When she returned to Chile in 1932, she brought back an international view of feminism and found that the political unrest which had forced her departure had settled, with civil liberties being restored.

[9] In 1935, Vergara joined with Elena Caffarena, Flora Heredia, Evangelina Matte, Graciela Mandujano, Aída Parada, Olga Poblete, María Ramírez [es], Eulogia Román [es], and Clara Williams de Yunge to found the Pro-Emancipation Movement of Chilean Women (MEMCh).

Vergara became the editor of the monthly bulletin of the organization, La Mujer Nueva (The New Woman), which published articles on various women's issues and information on international meetings and conferences.

But, she needed Vergara and MEMCh's support for the Equal Rights Treaty, which was facing strong opposition from the US State Department and was willing to compromise.

[17] She and Stevens presented a plea for the Pan-American Union to recommend that all member states enfranchise women as a means of promoting world peace.

[18] Unlike Stevens and Alice Paul, Vergara's feminist ideas were influenced by her study of communism and were decidedly leftist.

[22] Vergara resigned from MEMch in 1937, along with Caffarena, when it became apparent that the Communist members were trying to remake the organization to focus solely on the issues faced by working class women.