Frances Ursula Sweeney (c. 1907 – June 19, 1944) was a journalist and activist who campaigned against fascism, antisemitism, and political corruption in 1940s Boston.

Seeking to counteract the influence of the priest Charles Coughlin, whose antisemitic broadcasts were popular with Boston's Irish Catholics, she led protests and wrote editorials condemning the Christian Front and similar organizations.

She was secretary of the American-Irish Defense Association of Boston and vice chairman of the Massachusetts Citizens' Committee for Racial Unity.

Upon Sweeney's entrance to Mount St. Joseph Academy, her teacher remarked her as a 'sick girl', later that year she would receive a gold medal in Christian Doctrine.

Originally she focused on political corruption, but in the late 1930s, she expanded its mission to fighting fascist and antisemitic propaganda.

Jewish residents, businesses, and synagogues were frequent targets of what would now be called hate crimes: gangs, mostly of Irish Catholic youths, were incited by the priest Charles Coughlin and the Christian Front.

As the columnist Nat Hentoff recalled, "Riding by Franklin Field on this trip, I remembered losing some teeth there back then to a gang of readers of Charles Coughlin's Social Justice, who recognized me as a killer of their Lord.

Moran had been distributing Nazi propaganda linked to George Sylvester Viereck and once publicly threatened to "take care of Roosevelt.

[13] In his best-selling exposé of fascist organizations, Under Cover (1943), John Roy Carlson mentioned Sweeney as an inspiration, but likened her work in Boston to "digging at a mountain with a hand spade."

According to Carlson, Sweeney's editorials led to Catholic International, a pro-fascist magazine, being banned from the city's principal newsstands.