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Mary Tobin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Tobin across the 1920, 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1864), then head of a 4-person household.
Age 76
b. ~1864
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | Tobin |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 76 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chelsea |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chelsea |
| Est. Birth Year | ~1864 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alice Tobin | Daughter | — | 28 | ~1912 |
| John Tobin | Head | — | 74 | ~1866 |
| Mary Tobin | Spouse | — | 76 | ~1864 |
| Helen Tobin | Daughter | — | 45 | ~1895 |
Census Appearances
1920
Middlesex, Massachusetts
Spouse, age 53
Middlesex, Massachusetts · implied b. ~1867 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tobin |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Saleslady |
| Industry | Shoe Factory |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1930
Middlesex, Massachusetts
Spouse, age 65
Middlesex, Massachusetts · implied b. ~1865 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tobin |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1880 |
| Age at First Marriage | 29 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Suffolk-County, Massachusetts
Spouse, age 76
Suffolk-County, Massachusetts · implied b. ~1864 — 4 household members
| Surname | Tobin |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 76 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chelsea |
| 1935 Residence (County) | Suffolk |
| Naturalization Status | Naturalized |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| 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 Tobin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Tobin
Spouse · 1940 · age 76 · b. ~1864 · Massachusetts
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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-t0627-01641-00641)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Quinnlan Leo Kervilion | 9 | Son | — | Massachusetts |
| 42 | Robert Barry | 41 | Head | Fireman | Massachusetts |
| 43 | Mary E Barry | 43 | Wife | — | Massachusetts |
| 44 | Robert Barry | 10 | Son | — | Massachusetts |
| 45 | Joseph Godfrey | 36 | Head | Plumber | Massachusetts |
| 46 | Catherine M Godfrey | 31 | Wife | — | Massachusetts |
| 47 | Brendan Godfrey | 1 | Son | — | Massachusetts |
| 48 | Benjamin Appelbaum | 53 | Head | Tailor | Poland |
| 49 | Esther Appelbaum | 53 | Wife | — | Poland |
| 50 | Morris Appelbaum | 22 | Son | Butcher | Poland |
| 51 | David Appelbaum | 17 | Son | — | Massachusetts |
| 52 | Lillian Appelbaum | 15 | Daughter | — | Massachusetts |
| 53 | John Tobin | 74 | Head | Stevedore | Ireland |
| 54 | Mary E Tobin THIS PERSON | 76 | Wife | — | Ireland |
| 55 | Helen Tobin | 45 | Daughter | Clerk | Massachusetts |
| 56 | Alice Tobin | 28 | Daughter | Telephone Operator | Massachusetts |
| 57 | Joseph Finn | 67 | Head | Clerical | Massachusetts |
| 58 | Louise Scott | 63 | Sister | — | Massachusetts |
| 59 | Hazel Hamilton | 32 | Niece | Clerk | Massachusetts |
| 60 | Byron Hamilton | 9 | Grand Nephew | — | Massachusetts |
| 61 | Stella Hamilton | 5 | Grand Niece | — | Massachusetts |
| 62 | Annie S Halvorsen | 52 | Head | — | Turkey |
| 63 | Mary Halvorsen | 25 | Daughter | Office Work | Massachusetts |
| 64 | Dorothy Halvorsen | 22 | Daughter | Office Work | Massachusetts |
| 65 | Jackie Halvorsen | 13 | Son | — | Massachusetts |
| 66 | Philip Levin | 57 | Head | Laborer | Russia |
| 67 | Mary Levin | 55 | Wife | — | Russia |
| 68 | Fannie Levin | 22 | Daughter | Seamstress | Massachusetts |
| 69 | Ida Levin | 25 | Daughter | Salesgirl | Massachusetts |
| 70 | Nathan Cushner | 65 | Head | Baker | Russia |
| 71 | Louis Cushner | 27 | Son | Dray Clerk | Massachusetts |
| 72 | Thelma Cushner | 26 | Daughter | Social Worker | Massachusetts |
| 73 | Daniel Levenson | 38 | Head | Sheet Metal Worker | New York |
| 74 | Elizabeth Levenson | 36 | Wife | — | Massachusetts |
| 75 | Daniel Levenson | 13 | Son | — | Massachusetts |
| 76 | Dorothy Levenson | 10 | Daughter | — | Massachusetts |
| 77 | Herbert Proctor | 37 | Head | Dairy Employee | Massachusetts |
| 78 | Cecelia Proctor | 35 | Wife | — | Massachusetts |
| 79 | Clara Proctor | 13 | Daughter | — | Massachusetts |
| 80 | Marie Proctor | 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)