Stand at the Point on a March morning, where the Allegheny and Monongahela meet to make the Ohio, and you are standing on what Pittsburghers once called Little Ireland. The Irish in Pittsburgh did not arrive as guests. They dug the canals that opened the city to the west, raised the first Catholic church in the diocese, and packed the steel mills that turned a frontier outpost into an industrial empire. Two centuries on, roughly one in six in the region still claims Irish ancestry.
The Place
Pittsburgh sits at the western edge of Pennsylvania, where three rivers converge in a triangle of land the French and British once fought over for the route to the interior. The city grew rich on what lay beneath and around it: coal in the hills, iron ore floated downriver, and the mills that married the two into steel.
By the late nineteenth century Pittsburgh was producing a vast share of the nation’s steel, and the wealth of that industry built the libraries, universities, and grand neighbourhoods that still define the place. It was hard, smoky, profitable work, and it needed bodies.
The Irish were among the first to supply them, settling close to the rivers and rail yards, in the flats below the bluffs and the hollows between the hills, and from there spreading across a city that would never quite stop being Irish.
How It Became Irish
Before the Famine
The Irish presence in Pittsburgh is older than the United States itself. When the first federal census was taken in 1790, an estimated nineteen per cent of Pittsburgh’s small population was already Irish, much of it Ulster Protestant stock that had crossed the Atlantic earlier in the century, part of a movement of over a quarter of a million people from Ulster to the colonies before independence.
These early arrivals were not the Catholic poor of later legend, but farmers and traders. The community that would truly mark the city was still to come, and it arrived with a Roman Catholic faith that frightened the Protestant majority. In 1808 Irish settlers founded St. Patrick’s in what is now the Strip District, the first Catholic parish in the territory that would become the Diocese of Pittsburgh. In 1843 Rome named County Cork-born Michael O’Connor the first Bishop of Pittsburgh, and in 1847 the Sisters of Mercy he brought from Ireland opened Mercy Hospital, the city’s first permanent hospital.
The Canal and the Famine
The 1830s brought the Pennsylvania Canal, the public works system meant to link Philadelphia to Pittsburgh across the mountains. The excavation was brutal, and it fell largely to Irish labourers working for low wages in dangerous conditions. Cholera moved through the canal camps, and many of the dead were buried in mass graves near the works they never finished.
Then came the Great Famine. The failure of the potato crop between 1845 and 1851 killed roughly a million people in Ireland and drove millions more across the Atlantic. Pittsburgh drew thousands of them straight off the boats and into its mills, mines, and rail yards.
By 1890 the city counted around 27,000 Irish-born residents, the post-famine peak, a figure that excludes the far larger number of their American-born children who by then formed a growing share of the working class.
Little Ireland and Limerick
The poorest of the new arrivals crowded into the Point, the low triangle where the rivers meet, so densely Irish it was known plainly as Little Ireland. Conditions there were grim, the housing close and the work uncertain.
Across the Monongahela on the South Side, a cluster of Irish families gave their corner of the flats a name it kept for generations: Limerick, after the county many had left behind. The Irish also filled out the Hill District, Lawrenceville, Homewood, and Hazelwood, following the mills.
Allegheny City, the separate municipality across the river that Pittsburgh would later annex, held its own large Irish population, served from 1848 by St. Peter’s parish, one of many village-style parishes that organised Irish Catholic life around a church and a school.
From the Ditch to the Mill
Irish workers began at the bottom, in unskilled labour native-born Americans avoided, but the mills offered a ladder, and over a generation many moved into the skilled metal trades. The faith travelled with them. By the early twentieth century Bishop J.F. Regis Canevin told a visitor the Gospel was preached in thirteen languages across his diocese, and Gaelic was one of them, given at St. Mary of Mercy near the old Point for immigrants who had never fully taken to English.
That love of the old language took organised form in Hazelwood, where in November 1903 residents including Jeremiah McCarthy founded the O’Growney Gaelic Society, offering evening language classes and Saturday lectures. Within months it had more than fifty students, and when Gaelic League founder Douglas Hyde visited in January 1906, he drew a crowd of 2,500 at Old City Hall.
Nativism and Power
The Irish climb was resisted at every stage. Their Catholic faith and famine-era poverty drew open hostility from a Protestant establishment that doubted whether Catholics could be loyal Americans at all, and Irish workers were stereotyped, segregated into the worst jobs, and shut out of the city’s institutions.
They answered with organisation. Fraternal bodies like the Ancient Order of Hibernians knit the community together, and the Catholic parish became a second government. Over time the Irish turned numbers into power. David L. Lawrence, the son of Irish Catholics, ran Pittsburgh as mayor from 1946 and went on to become Governor of Pennsylvania, and later mayors Pete Flaherty, Tom Murphy, and Bob O’Connor carried the line forward. Labour was the other arena: Philip Murray, born in Scotland to Irish parents, rose to lead the United Steelworkers and the CIO. The Irish had started in the ditch, and within a century some of them ran the city and the unions both.
The Landmarks
St. Patrick Church, 1711 Liberty Avenue, Strip District. The descendant of the 1808 parish, the cradle of Irish Pittsburgh. Inside is a Scala Sancta, a replica of the Holy Stairs in Rome, twenty-eight steps that pilgrims climb on their knees. As the Irish core moved away the parish merged with nearby St. Stanislaus, but the stairs and the name remain.
Mercy Hospital, 1400 Locust Street, Uptown. Founded in 1847 by the Sisters of Mercy brought from Ireland by Bishop O’Connor, it was the city’s first permanent hospital. Generations of Irish families were born and treated within its walls, and it works on today.
The Point, Point State Park, downtown. The low triangle where the Allegheny and Monongahela form the Ohio was once Little Ireland, the densely packed first home of famine-era immigrants. The slums are long gone, cleared for the park, but the ground holds the memory of where Irish Pittsburgh began.
Mullaney’s Harp & Fiddle, 2329 Penn Avenue, Strip District. Open since 1992, it is the city’s best-known home for traditional Irish music, with a weekly ceili hosted by the Pittsburgh Ceili Club. On lists of the country’s finest Irish pubs it appears again and again.
J. Gough’s Tavern, Greenfield. A whiskey-centric neighbourhood pub in Greenfield, one of the mixed Irish, Polish, Slovak, and Hungarian districts whose families once worked the mills of Hazelwood and Homestead. It carries on the public house tradition in a part of the city the Irish helped settle.
Riley’s Pour House, Carnegie. Dating to 1979 in the borough of Carnegie just west of the city, Riley’s is a classic Irish public house run today by Joe Riley and Gino Torriero, with Irish food, whiskey, and live music. It draws crowds from across the region, especially in March.
The former Irish Centre of Pittsburgh, 6886 Forward Avenue, Squirrel Hill. Founded in 1988, it was for decades the hub of Irish cultural and educational life, on a four-acre site in Squirrel Hill. It closed and sat empty in recent years, and in 2024 Phipps Conservatory finalised its purchase of the property for around 760,000 dollars.
Where They Came From
The Irish who built Pittsburgh came in two distinct waves from two different Irelands. The earliest, the eighteenth-century arrivals, were largely Ulster Protestants, the so-called Scots-Irish who left the northern province and pushed inland along the frontier ahead of the canals.
The famine generation that followed was overwhelmingly Catholic and came from the harder-hit rural west and south. The South Side neighbourhood named Limerick records one such origin directly, and the first bishop’s roots in County Cork point to another. What drew them to Pittsburgh was work that needed no English and no capital, only a strong back, and once a family had a foothold, cousins and neighbours followed the same chain across the water.
Pittsburgh Today
The mills that drew the Irish are largely gone, and the Point that was Little Ireland is a state park. Yet the Irish imprint has not faded so much as dissolved into the city itself. Estimates put the share claiming Irish ancestry between eleven and sixteen per cent, and Allegheny County holds more people of Irish descent than any other county in Pennsylvania, the Irish now the region’s second-largest nationality after the Germans.
The community no longer clusters in a single Little Ireland; it scattered across the suburbs and the South Hills generations ago. What endures is celebration rather than enclave: the St. Patrick’s Day Parade, which dates in some form to 1869 and now draws crowds in the hundreds of thousands, and an Irish Festival each September that gathers around 25,000 people.
The closing of the Irish Centre marks a real loss, the kind of quiet ending that comes when a community grows so woven into a place that it no longer needs a separate building to remind itself who it is. The pubs still pour and the parade still marches, and somewhere in the flat, blunt music of Pittsburgh speech the Irish are still there, having long ago stopped being immigrants and simply become the city.
The story rhymes across the industrial Northeast. You can hear the same arc in the Irish of Worcester, Massachusetts, the Irish of Lawrence, Massachusetts, the Irish of New Haven, Connecticut, and the Irish of Albany, New York: famine refugees who dug the canals, packed the factories, and built parishes and political machines that outlasted the industries that drew them. Pennsylvania’s mill towns drew other peoples on the same terms, among them the Italians of Hazleton, whose path through the anthracite country runs parallel to the Irish through the steel.
Frequently Asked Questions
When did the Irish first come to Pittsburgh?
The Irish in Pittsburgh predate the United States. By the first federal census in 1790, an estimated nineteen per cent of the population was already Irish, largely Ulster Protestants. The much larger Catholic wave arrived during and after the Great Famine of 1845 to 1851.
Why did the Irish settle in Pittsburgh?
They came for work that required no capital and no English: digging the Pennsylvania Canal in the 1830s, then labouring in the mines, rail yards, and above all the steel mills. Pittsburgh’s booming industry could absorb unskilled labour in numbers few other cities could match.
Where did the Irish live in Pittsburgh?
The poorest famine-era Irish crowded into the Point, so densely Irish it was called Little Ireland. Others settled a South Side district they named Limerick, and filled out the Hill District, Lawrenceville, Hazelwood, and Allegheny City, close to the rivers, rail lines, and mills.
How many people in Pittsburgh have Irish ancestry today?
Estimates place the share claiming Irish ancestry at roughly eleven to sixteen per cent, about one in six residents. Allegheny County has more people of Irish descent, over two hundred thousand, than any other county in Pennsylvania, making the Irish the region’s second-largest nationality after the Germans.
What is the oldest Irish Catholic church in Pittsburgh?
St. Patrick’s, founded by Irish settlers in 1808 in what is now the Strip District, was the first Catholic parish in the territory that became the Diocese of Pittsburgh. Its current building houses a Scala Sancta, a replica of the Holy Stairs in Rome that pilgrims climb on their knees.
Does Pittsburgh still celebrate its Irish heritage?
Very much so. The St. Patrick’s Day Parade traces its roots to 1869 and now draws crowds estimated in the hundreds of thousands, and a Pittsburgh Irish Festival each September gathers around 25,000 people. Pubs like Mullaney’s Harp & Fiddle keep traditional music and the ceili alive year-round.
If your family’s story passed through Pittsburgh, or any of the places the Irish have made home in America, Atlas of Home can trace that journey. From a townland in Cork or Donegal to a tenement at the Point, to wherever you are now.