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 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 12-person household.
Age 16
b. ~1924
Female
Daughter
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Harrington |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Occupation | XOXO |
| Industry | XOXO |
| Class of Worker | XOXO |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Xoxo |
| Township / Ward | Boston |
| Est. Birth Year | ~1924 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Ann Harrington | Daughter | — | 3 | ~1937 |
| Catherine Harrington | Daughter | — | 7 | ~1933 |
| Julia Harrington | Daughter | — | 12 | ~1928 |
| Mary Harrington | Daughter | — | 16 | ~1924 |
| Regina Harrington | Daughter | — | 19 | ~1921 |
| Margaret Harrington | Daughter | — | 9 | ~1931 |
| Jeremiah Harrington | Head | — | 51 | ~1889 |
| John Harrington | Son | — | 23 | ~1917 |
| James Harrington | Son | — | 5 | ~1935 |
| Michael Harrington | Son | — | 14 | ~1926 |
| Gerald Harrington | Son | — | 21 | ~1919 |
| Margaret Harrington | Spouse | — | 40 | ~1900 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 6
Suffolk, Massachusetts · implied b. ~1924 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harrington |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Suffolk-County, Massachusetts
Daughter, age 16
Suffolk-County, Massachusetts · implied b. ~1924 — 12 household members
| Surname | Harrington |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Boston |
| 1935 Residence (County) | Suffolk |
| Occupation | XOXO |
| Industry | XOXO |
| Class of Worker | XOXO |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Harrington
Daughter · 1940 · age 16 · b. ~1924 · Massachusetts
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Sibling
Regina Harrington
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Harrington
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Harrington
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Harrington
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Harrington
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ann Harrington
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Harrington
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Harrington
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Harrington
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
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-t0627-01659-00472)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Maroney, Melvina Mahoney | 5 | — | — | Mass |
| 42 | Maroney, Omer Mahoney | 25 | Son | — | Mass |
| 43 | George T Hickey | 39 | Head | Xoxo | Mass |
| 44 | Elizabeth Hickey | 34 | Wife | Xoxo | Mass |
| 45 | George Jr Hickey | 15 | Son | Xoxo | Mass |
| 46 | Ethel Hickey | 14 | Daughter | Xoxo | Mass |
| 47 | Elizabeth Hickey | 11 | Daughter | Xoxo | Mass |
| 48 | William Hickey | 10 | Son | Xoxo | Mass |
| 49 | Mary Ann Hickey | 4 | Daughter | — | Mass |
| 50 | Joan Hickey | 2 | Daughter | — | Mass |
| 51 | Martin Colman | 32 | Head | Farmer | Mass |
| 52 | Arline Colman | 28 | Wife | Xoxo | Mass |
| 53 | Rosalie Colman | 1 | Daughter | — | Mass |
| 54 | James O'Brien | 33 | Head | Stock Clerk | Mass |
| 55 | Mary O'Brien | 29 | Wife | Xoxo | Mass |
| 56 | Marion O'Brien | 5 | Daughter | Xoxo | Mass |
| 57 | James O'Brien | 5 | Son | Xoxo | Mass |
| 58 | Edward O'Brien | 3 | Son | — | Mass |
| 59 | Patricia O'Brien | 1 | Daughter | — | Mass |
| 60 | Jeremiah Harrington | 51 | Head | Automobile Washer | Eire |
| 61 | Margaret Harrington | 40 | Wife | Xoxo | Eire |
| 62 | John Harrington | 23 | Son | Chauffeur | Montana |
| 63 | Gerald Harrington | 21 | Son | Errand Boy | Montana |
| 64 | Regina R Harrington | 19 | Daughter | Order Boy | Montana |
| 65 | Mary Harrington THIS PERSON | 16 | Daughter | Xoxo | Montana |
| 66 | Michael Harrington | 14 | Son | Xoxo | Mass |
| 67 | Julia Harrington | 12 | Daughter | — | Mass |
| 68 | Margaret T Harrington | 9 | Daughter | — | Mass |
| 69 | Catherine Harrington | 7 | Daughter | — | Mass |
| 70 | James Harrington | 5 | Son | — | Mass |
| 71 | Ann Harrington | 3 | Daughter | — | Mass |
| 72 | Walter Mortimer | 25 | Head | Lumberman | English |
| 73 | Marion Mortimer | 22 | Wife | Xoxo | Maine |
| 74 | Walter G Mortimer | 3 | Son | — | Mass |
| 75 | Robert G Mortimer | 1 | Son | — | Mass |
| 76 | Dennis Hickey | 35 | Head | Fuel Receiver | Mass |
| 77 | Josephine B Hickey | 30 | Wife | Xoxo | Mass |
| 78 | William J Hickey | 11 | Son | Xoxo | Mass |
| 79 | Robert L Hickey | 8 | Son | Xoxo | Mass |
| 80 | Joseph F Hickey | 5 | Son | Xoxo | Mass |
Related Census Records
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)