MH
Mary Harrington — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Harrington across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1895), then head of a 6-person household.
Age 45
b. ~1895
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Harrington |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Boston City |
| Est. Birth Year | ~1895 |
Household Members
Census records only state relationship to the household head.
Pairwise kinship is derived (~90–95% accurate), not recorded.
Step/blended families and boarders can break it.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Joanne Harrington | Daughter | — | 11 | ~1929 |
| Ellen Harrington | Daughter | — | 11 | ~1929 |
| John Harrington | Head | — | 48 | ~1892 |
| John Harrington | Son | — | 15 | ~1925 |
| Richard Harrington | Son | — | 17 | ~1923 |
| Mary Harrington | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Suffolk, Massachusetts
Spouse, age 29
Suffolk, Massachusetts · implied b. ~1891 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1910 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Gaelic |
| Birth Country | Ireland |
| Year of Naturalization | 1916 |
| Birthplace (normalized) | ireland |
1930
Suffolk, Massachusetts
Spouse, age 39
Suffolk, Massachusetts · implied b. ~1891 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1910 |
| Age at First Marriage | 26 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Suffolk-County, Massachusetts
Spouse, age 45
Suffolk-County, Massachusetts · implied b. ~1895 — 6 household members
| Surname | Harrington |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
Model Tree
An inferred pedigree reconstructed from census links — up to 4 generations within the 1900–1950 window. Closer generations are built from household co-residence; deeper ones are bridged by following a relative to their own childhood census. Confidence compounds and weakens with each generation.
Our Model Tree links Mary Harrington across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Harrington
Spouse · 1940 · age 45 · b. ~1895 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Suffolk-County, Massachusetts
Open full size
1940 US Federal Census — Suffolk-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01682-00504)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary Susame | 32 | Daughter | Teacher | Massachusetts |
| 2 | Esther Susame | 30 | Daughter | Teacher | Massachusetts |
| 3 | Rita Susame | 24 | Daughter | — | Massachusetts |
| 4 | James Duggan | 16 | Cousin | — | Massachusetts |
| 5 | William Lawlor | 37 | Head | Radio Operator | Canada-English |
| 6 | Leonard Lawlor | 33 | Brother | Clerk | Canada-English |
| 7 | Alice Lawlor | 69 | Mother | — | Canada-English |
| 8 | Dr John Ward | 48 | Head | Doctor | New York |
| 9 | Margaret Ward | 40 | Wife | — | Canada-Irish |
| 10 | Esther Ward | 23 | Daughter | — | Massachusetts |
| 11 | Jean Ward | 19 | Daughter | — | Massachusetts |
| 12 | John Ward | 17 | Son | — | Massachusetts |
| 13 | John Morrissey | 62 | Head | Food Inspector | Massachusetts |
| 14 | Ellen Morrissey | 57 | Wife | — | Massachusetts |
| 15 | Catherine Morrissey | 32 | Daughter | Secretary | Massachusetts |
| 16 | John Sullivan | 43 | Head | Salesman | Massachusetts |
| 17 | Mary Sullivan | 46 | Wife | — | Massachusetts |
| 18 | John Sullivan | 14 | Son | — | Massachusetts |
| 19 | Marie Sullivan | 11 | Daughter | — | Massachusetts |
| 20 | Donald Sullivan | 7 | Son | — | Massachusetts |
| 21 | Catherine Muldoon | 70 | Head | — | Massachusetts |
| 22 | John Sullivan | 65 | Head | Inspector | Massachusetts |
| 23 | Marjorie Sullivan | 24 | Daughter | Saleswoman | Massachusetts |
| 24 | Martha Thompson | 13 | Ward | — | Massachusetts |
| 25 | Philip Thompson | 14 | Ward | — | Massachusetts |
| 26 | Catherine Conroy | 66 | Sister | — | Massachusetts |
| 27 | George Muldoon | 63 | Head | Carpenter | Massachusetts |
| 28 | Annie Muldoon | 61 | Wife | — | Massachusetts |
| 29 | George Muldoon | 35 | Son | Field Supervisor | Massachusetts |
| 30 | James Anthony | 57 | Brother in law | Laborer | Massachusetts |
| 31 | William Mc Laughlin | 38 | Head | Conductor | Massachusetts |
| 32 | Angela Mc Laughlin | 37 | Wife | — | Massachusetts |
| 33 | William Mc Laughlin | 1 | Son | — | Massachusetts |
| 34 | Infant Mc Laughlin | 0 | Son | — | Massachusetts |
| 35 | John Harrington | 48 | Head | Letter Carrier | Ireland |
| 36 | Mary Harrington THIS PERSON | 45 | Wife | — | Ireland |
| 37 | Richard Harrington | 17 | Son | — | Massachusetts |
| 38 | John Harrington | 15 | Son | — | Massachusetts |
| 39 | Joanne Harrington | 11 | Daughter | — | Massachusetts |
| 40 | Ellen Harrington | 11 | Daughter | — | Massachusetts |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 United States Federal Census (NARA). Our Model Tree links this person across census decades using XGBoost-based record linkage, with per-link confidence scores. Household corroboration strengthens the signal when co-residents appear on the same census pages in multiple years.
Source: National Archives and Records Administration (NARA)