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Mary Mclaughlin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Suffolk-County, Massachusetts
Our Model Tree links this Mary Mclaughlin across the 1930 and 1940 US Censuses in Suffolk-County, Massachusetts (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 11-person household.
Age 15
b. ~1925
Female
Daughter
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Suffolk-County, Massachusetts |
| Surname | McLaughlin |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Boston City |
| Est. Birth Year | ~1925 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mclaughlin | Daughter | — | 15 | ~1925 |
| Kathleen Mclaughlin | Daughter | — | 9 | ~1931 |
| Anna Mclaughlin | Daughter | — | 16 | ~1924 |
| Theresa Mclaughlin | Daughter | — | 11 | ~1929 |
| John Mclaughlin | Head | — | 48 | ~1892 |
| George Mclaughlin | Son | — | 12 | ~1928 |
| Edward Mclaughlin | Son | — | 22 | ~1918 |
| Bernard Mclaughlin | Son | — | 17 | ~1923 |
| Charles Mclaughlin | Son | — | 25 | ~1915 |
| John Mclaughlin | Son | — | 19 | ~1921 |
| Anna Mclaughlin | Spouse | — | 44 | ~1896 |
Census Appearances
1930
Suffolk, Massachusetts
Daughter, age 4
Suffolk, Massachusetts · implied b. ~1926 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLaughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Canada English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Suffolk-County, Massachusetts
Daughter, age 15
Suffolk-County, Massachusetts · implied b. ~1925 — 11 household members
| Surname | McLaughlin |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Boston City |
| 1935 Residence (County) | Suffolk |
| Highest Grade | H-1 |
| 1935 Residence | Same House |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Mclaughlin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Mclaughlin
Daughter · 1940 · age 15 · b. ~1925 · Massachusetts
★ You are viewing this record
Sibling
Bernard Mclaughlin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Mclaughlin
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Anna Mclaughlin
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Mclaughlin
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Mclaughlin
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Mclaughlin
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Theresa Mclaughlin
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Mclaughlin
Sibling · 1940 · age 19
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-t0627-01659-00666)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John G. Balakin | 53 | Head | Doctor | Massachusetts |
| 42 | Mae E. Balakin | 32 | Wife | — | Massachusetts |
| 43 | Florence T. Balakin | 23 | Daughter | — | Massachusetts |
| 44 | Mary T. Balakin | 13 | Daughter | — | Massachusetts |
| 45 | William Kearns | 24 | Head | Phys. Inst. | Massachusetts |
| 46 | Josephine Kearns | 26 | Wife | — | Massachusetts |
| 47 | Elaine Kearns | 0 | Daughter | — | Massachusetts |
| 48 | Frank J. Kearns | 57 | Head | Supervisor | Massachusetts |
| 49 | Zita Kearns | 47 | Wife | — | Massachusetts |
| 50 | Thomas P. Kearns | 21 | Son | File Clerk | Massachusetts |
| 51 | Mary E. Kearns | 17 | Daughter | — | Massachusetts |
| 52 | Edward J. Kearns | 16 | Son | — | Massachusetts |
| 53 | Florence Richardson | 64 | Head | — | Maine |
| 54 | Edward Higgins | 57 | Lodger | Watchman | Massachusetts |
| 55 | John Mclaughlin | 48 | Head | Baggage Room | Eire |
| 56 | Anna Mclaughlin | 44 | Wife | — | Eire |
| 57 | Charles J. Mclaughlin | 25 | Son | Porter | Massachusetts |
| 58 | Edward J. Mclaughlin | 22 | Son | Longshoreman | Massachusetts |
| 59 | John E. Mclaughlin | 19 | Son | Longshoreman | Massachusetts |
| 60 | Bernard L. Mclaughlin | 17 | Son | — | Massachusetts |
| 61 | Anna F. Mclaughlin | 16 | Daughter | — | Massachusetts |
| 62 | Mary E. Mclaughlin THIS PERSON | 15 | Daughter | — | Massachusetts |
| 63 | George J. Mclaughlin | 12 | Son | — | Massachusetts |
| 64 | Theresa A. Mclaughlin | 11 | Daughter | — | Massachusetts |
| 65 | Kathleen E. Mclaughlin | 9 | Daughter | — | Massachusetts |
| 66 | Julia S. Fitzgerald | 61 | Head | — | New York |
| 67 | Sarah J. Kelly | 53 | Hazard | Janitor | England |
| 68 | James Marmara | 49 | Head | — | Massachusetts |
| 69 | Elizabeth M. Marmara | 45 | Sister | Clerical | Massachusetts |
| 70 | Thomas Piraino | 27 | Head | Draftsman | New York |
| 71 | Theodora Piraino | 27 | Wife | — | Massachusetts |
| 72 | Marie V. Piraino | 0 | Daughter | — | Massachusetts |
| 73 | Daniel Saunders | 70 | Head | — | Eire |
| 74 | William Saunders | 23 | Son | Operator | Massachusetts |
| 75 | Mary Mcnamara | 30 | Lodger | Maid | Eire |
| 76 | Nora S. Owens | 65 | Head | — | Irish Free State |
| 77 | Josephine A. Owens | 32 | Daughter | Bookkeeper | Massachusetts |
| 78 | Francis J. Owens | 33 | Son | Salesman | Massachusetts |
| 79 | Begins Block 4 Here Ends Block 3 | None | — | — | — |
| 80 | Missing Information About 1 Family From Neighbor, One Line Less | None | — | — | — |
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)