Margaret Lillian Foley (February 19, 1873 - June 14, 1957) was an Irish-American labor organizer, suffragist, and social worker from Boston.

She often braved male-dominated crowds in settings such as the Boston Stock Exchange and the Chamber of Commerce, speaking and handing out leaflets.

[7] To avoid being arrested for speaking on a public street without a permit, she once addressed a Boston crowd from the roof of a one-story building: Suddenly, sounding shrilly above the deep tones of the speaker, a woman's voice was heard.

Before a crowd of 1,500 men, the stylishly dressed Miss Foley debated her opponent so successfully that when she was finished, the audience gave three cheers for women's rights and threw their hats in the air.

[4] In 1911 she and Florence Luscomb attended the international suffrage convention in Stockholm and spent a month in London studying the tactics used by English suffragists.

[5] That same year, in her automobile known as the "Big Suffragette Machine", she followed the Republican candidate for governor, Louis A. Frothingham, from one speaking engagement to the next, challenging his anti-suffrage views.

She attracted publicity and marriage proposals while she was there; once dressing like a miner in coat and trousers, another time descending 2,500 feet underground in Virginia City to give a suffrage speech.

Her working-class, Irish Catholic background was an asset while she was rallying crowds of workers on the streets of Boston, but after the start of World War I when the movement's focus shifted to other, subtler tactics, Foley found herself shut out.