Irish-American Heritage Month and St. Patrick’s Day: March 2026

The U.S. Congress designated March as Irish-American Heritage Month in 1991, and the president issues a proclamation commemorating the occasion each year.

Originally a religious holiday to honor St. Patrick who introduced Christianity to Ireland in the 5th century, St. Patrick’s Day has evolved into a celebration of all things Irish. The world’s first St. Patrick’s Day parade occurred in New York City on March 17, 1762, featuring Irish soldiers who served in the English military. This parade became an annual event, with President Harry S. Truman attending in 1948. The following facts are made possible by the invaluable responses to U.S. Census Bureau surveys. We appreciate the public’s cooperation as we continuously measure America’s people and economy. 

Did You Know?

32.4 million or 9.5%

The number and share of U.S. residents who claimed Irish ancestry in 2024. Source: 2024 American Community Survey 1-year estimates

116,641

The number of foreign-born U.S. residents who reported Ireland as their birthplace in 2024. Source: 2024 American Community Survey 1-year estimates

436,577 or 8.4%

The number of people living in Cook County, Illinois — the nation’s county with the largest Irish American population — who claimed Irish ancestry in 2024. Source: 2024 American Community Survey 1-year estimates

More Stats

For more information about the Irish-American population, check out this Selected Population Profile from the 2024 American Community Survey 1-year estimates. Statistics include:

• Sex and age.
• Marital status.
• Educational attainment.
• Veteran status.
• Employment status.
• Occupation.
• Commuting.
• Housing.
• Income.

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