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Happy birthday USA: Unsung Italian heroes. Mary Treglia (Iowa)

Buon Compleanno USA: Unsung Italian heroes. Mary Treglia (Iowa)

Author: Jennifer Caito

In 2026, We the Italians celebrates “Two Anniversaries, One Heart” – the 250th anniversary of the United States and the 80th anniversary of the Italian Republic. This article is part of the “Happy Birthday USA: Unsung Italian Heroes” project, in which we share how, in every corner of the United States, an Italian has made a positive impact on their local community.

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How an Italian immigrant’s daughter changed the face of Iowa

Long before immigration services became formalized and community advocacy became commonplace, one woman dedicated her life to ensuring that every newcomer in Sioux City, Iowa had the opportunity to belong.

Mary J. Treglia devoted herself to helping immigrants build new lives in Sioux City, Iowa. As director of the Community House, she became one of the Midwest’s most influential advocates for immigrant families, believing that every person—regardless of where they came from—deserved dignity, opportunity, and a place to call home.

Born on October 7, 1897, Mary Joanna Treglia understood the immigrant experience because it was her own family’s story.

Her parents immigrated from Italy during the 1880s in search of the same dream shared by millions of newcomers: a better life in America. When Mary’s father died, leaving her mother to raise her alone to raise a baby. Her mother supported the family by operating a small confectionery store in Sioux City, teaching Mary firsthand the resilience, sacrifice, and determination required to survive as an immigrant family-shaping Mary’s lifelong compassion.

Sioux City was booming. Meatpacking plants, railroads, and industry had attracted thousands of immigrants from Italy. Immigrants from Italy, Poland, Greece, Ireland, Russia, Lithuania, Mexico, and many other nations, creating one of Iowa’s most culturally diverse communities.

Many immigrants arrived with little money, limited education, and no English. Some could neither read nor write. Without language skills or citizenship, families often faced poverty, discrimination, isolation, and limited opportunities. Like many first-generation Americans, Mary understood that story because it was her family’s story.

Mary attended the opening of Sioux City’s new Community House, established to help immigrant families learn English, prepare for citizenship, and successfully adapt to life in America. She first volunteered, quickly became assistant director, and in 1926 was named director.

Under her leadership, the Community House became much more than a social service agency. It became a true neighborhood home where immigrants found education, legal guidance, youth programs, recreation, cultural understanding, and hope.

She founded the Women of All Nations Club, bringing together women from different backgrounds. Her vision was simple; diversity was not something to overcome—it was something to celebrate.

Mary also established clubs for girls. She also worked with young people referred by the juvenile court.

In recognition of her extraordinary service, the Community House was officially renamed the Mary J. Treglia Community House in 1956—an honor rarely bestowed during a person’s lifetime.

Mary’s legacy endured beyond social work.

Mary J. Treglia Community House continues serving Siouxland today with the same mission: welcoming and advocating for people new to our country by providing immigration, family, and educational services.

She knew what it meant to lose a parent, to struggle. She knew the courage it took to begin again in a new country. But perhaps most importantly, she recognized that beneath every language, every tradition, and every nationality was a shared human desire—to be accepted, respected, and given the opportunity to pursue the American Dream.

Mary J. Treglia did not simply serve immigrants-She built community.

And in doing so, she left a legacy that continues to remind us that the strength of Iowa and America has always been found in its ability to welcome, support, and unite people from every corner of the world.

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