Tracing Your Irish Ancestors in Boston

Why Boston?

The Famine changed Boston permanently. In 1845, Boston was a city of about 114,000 people. By 1855, more than 50,000 Irish-born residents had arrived — one of the fastest demographic transformations in American urban history. They came primarily from the western provinces of Ireland: Connacht, Munster, and the Ulster borderlands. Mostly poor. Mostly Catholic. Mostly speaking Irish as their first language.

The journey was cheap but brutal. "Coffin ships" — overcrowded sailing vessels carrying emigrants at minimum cost — landed at East Boston and the Charlestown waterfront. The survivors crowded into the cheapest neighbourhoods: the North End, Fort Hill, South Cove. They built the churches, dug the sewers, and fought the fires. By 1880, the Irish controlled Boston's Democratic Party machine. By 1914, they had their first mayor — John Fitzgerald, grandfather of John F. Kennedy.

Understanding this history gives context to the records. Famine-era arrivals often landed with nothing — no documentation, no money, no English. Their trails in the official record begin in Boston, not in Ireland. But with patience, those trails can be followed all the way back to a specific parish in County Cork or County Clare.

The Irish Neighborhoods of Boston

Boston's Irish population was never uniformly distributed. Different communities clustered by county of origin and by decade of arrival. Knowing where your ancestors lived narrows the church records you need to search.

Key Record Sources

Massachusetts Vital Records (1841–1910)

Massachusetts has some of the best publicly accessible vital records in the US. Civil registration of births, marriages, and deaths began in 1841 — before it was mandatory elsewhere in the US. The Massachusetts Vital Records (1841–1910) are fully digitised and searchable at FamilySearch.org (free) and on Ancestry. These records often include the parents' birthplace, which may name the Irish county.

US Federal Census (1850–1940)

The US Census asked for birthplace from 1850 onward. "Ireland" is the most specific answer most immigrants gave. But from 1880, the census added parents' birthplaces — and occasionally you'll find an immigration year that helps narrow the search. The 1900 and 1910 censuses asked for the year of immigration directly. Search free at FamilySearch.org.

Catholic Church Records

The Archdiocese of Boston Archives holds microfilmed baptism, marriage, and burial records for all parishes from their founding. Many go back to the 1840s and 1850s for the earliest Famine-era congregations. Contact the Archives at bostoncatholic.org/archives to request record searches.

FamilySearch has digitised a significant portion of Boston Catholic records, particularly for the major parishes in South Boston, Charlestown, and Dorchester. Search FamilySearch for "Massachusetts, Catholic Records" to find what's available online.

Passenger Manifests and Immigration Records

Pre-1891 passenger lists (before Ellis Island) for Boston port arrivals are held at the National Archives. They are searchable on Ancestry under "Boston Passenger Lists, 1820–1943." These lists often show very little — name, age, sex, occupation — but they establish an arrival date and sometimes a travelling companion (a sibling or cousin) who helps build the family picture.

From 1891 onward, Federal immigration records became much more detailed. After 1906, naturalisation records include place of birth in Ireland, which can name a specific county or even a parish.

Naturalisation Records

Naturalisation papers — the "declaration of intention" (First Papers) and the "petition for naturalisation" (Second Papers) — are among the most genealogically valuable records for Irish immigrants. Post-1906 naturalisations include place of birth in Ireland, physical description, and sometimes the name of the ship they arrived on.

Boston-area naturalisations are held at the National Archives facility in Waltham, Massachusetts. Many are on Ancestry. Search specifically for "Massachusetts Naturalization Records" and filter by county of residence.

Boston City Directory

The annual Boston City Directory, published from 1789 to the 1920s, lists heads of household and their occupation and address. This is an invaluable tool for tracking an immigrant family's movement through Boston's neighbourhoods decade by decade. Available at the Boston Public Library (central branch) and partially digitised on Internet Archive.

Death Records and Obituaries

Irish-American newspapers published detailed obituaries that often name the county of origin in Ireland and list surviving relatives by name. The Boston Pilot — founded in 1829 — is the key publication. The "Missing Persons" column of the Boston Pilot, which ran from the 1830s to the 1920s, was used by Famine survivors to find lost relatives. It has been digitised at infowanted.bc.edu — a remarkable free resource.

Archives and Libraries

The Most Common Boston Irish Surnames

The surnames carried into Boston by Famine-era and post-Famine Irish immigrants cluster around the counties that sent the most emigrants. The following names are among the most common in 19th-century Boston Catholic records:

From County Cork: Sullivan, McCarthy, Murphy, Crowley, Horgan, Corcoran

From County Kerry: Moriarty, O'Connell, Shea, O'Sullivan, Lynch

From County Galway / Connacht: Burke, Hynes, Tierney, Walsh, O'Flaherty

From County Clare: Minogue, Moloney, McNamara, Ryan

Explore the origins and county roots of these surnames: All Irish Surnames →

Related guides: Boston Irish Neighbourhoods · Irish Surname Origins · Find Your Irish County