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Mary Mclaughlin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Delaware-County, Pennsylvania
Our Model Tree links this Mary Mclaughlin across the 1920, 1930 and 1940 US Censuses in Delaware-County, Pennsylvania (XGBoost, ~Confirmed) — first a spouse (b.~1893), then head of a 4-person household.
Age 47
b. ~1893
Female
Spouse
Born: Delaware
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Delaware-County, Pennsylvania |
| Surname | McLaughlin |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | Chester |
| 1935 Residence (County) | Delaware |
| Additional Details | |
| Highest Grade | H-1 |
| 1935 Residence | Same Place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
| Township / Ward | Chester |
| Est. Birth Year | ~1893 |
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 |
|---|---|---|---|---|
| Dorothy Mclaughlin | Daughter | — | 14 | ~1926 |
| John Mclaughlin | Head | — | 44 | ~1896 |
| James Mclaughlin | Son | — | 15 | ~1925 |
| Mary Mclaughlin | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Delaware, Pennsylvania
Spouse, age 26
Delaware, Pennsylvania · implied b. ~1894 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLaughlin |
| Given Name | Mary E |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Delaware |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | Butcher |
| Industry | Meat Store |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1930
Delaware, Pennsylvania
Other, age 36
Delaware, Pennsylvania · implied b. ~1894 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McLaughlin |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Delaware |
| Age at First Marriage | 21 |
| Father's Birthplace | Delaware |
| Mother's Birthplace | Delaware |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
1940
Delaware-County, Pennsylvania
Spouse, age 47
Delaware-County, Pennsylvania · implied b. ~1893 — 4 household members
| Surname | McLaughlin |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Delaware |
| 1935 Residence (City) | Chester |
| 1935 Residence (County) | Delaware |
| Highest Grade | H-1 |
| 1935 Residence | Same Place |
| Birth State | Delaware |
| Birth Country | United States |
| Birthplace (normalized) | delaware |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mclaughlin
Spouse · 1940 · age 47 · b. ~1893 · Pennsylvania
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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 — Delaware-County, Pennsylvania
Open full size
1940 US Federal Census — Delaware-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03487-00757)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John Mclaughlin | 44 | Head | Meat Cutter | Maryland |
| 42 | Mary E. Mclaughlin THIS PERSON | 47 | Wife | — | Delaware |
| 43 | Dorothy Mclaughlin | 14 | Daughter | New Worker | Pennsylvania |
| 44 | James Mclaughlin | 15 | Son | — | Pennsylvania |
| 45 | Mary Holman | 55 | Head | Proprietor | Pennsylvania |
| 46 | (There Ends April 8Th And Begins April 9Th) Holman | None | — | — | — |
| 47 | George Michaelides | 46 | Head | Handy Man | Cyprus |
| 48 | Nancy Michaelides | 23 | Wife | — | Pennsylvania |
| 49 | George Jr. Michaelides | 3 | Son | — | Pennsylvania |
| 50 | Catherine Michaelides | 1 | Daughter | — | Pennsylvania |
| 51 | William Simmons | 29 | Head | Storekeeper | Pennsylvania |
| 52 | Rose Simmons | 24 | Wife | — | Pennsylvania |
| 53 | Edna Simmons | 7 | Daughter | — | Pennsylvania |
| 54 | Doris Simmons | 4 | Daughter | — | Pennsylvania |
| 55 | William Simmons | 6 | Son | — | Pennsylvania |
| 56 | Mary Loretta Cole | 53 | Head | Seamstress | Pennsylvania |
| 57 | Edward Cole | 21 | Son | Operator Helper | Pennsylvania |
| 58 | Bernard Cole | 19 | Son | Office Boy | Pennsylvania |
| 59 | Mary Virginia Cole | 16 | Daughter | New Worker | Pennsylvania |
| 60 | Mary Parkinson | 35 | Head | — | Pennsylvania |
| 61 | Alfred De Tucker Parkinson | 10 | Son | — | England |
| 62 | William Eaves | 34 | Head | Jackhammer Oper. | Pennsylvania |
| 63 | Anna Eaves | 39 | Wife | Saleswoman | Pennsylvania |
| 64 | Gertrude Helen Eaves | 16 | Daughter | Saleswoman | Pennsylvania |
| 65 | John D. Galvin | 38 | Head | Erector | Delaware |
| 66 | Helen Galvin | 33 | Wife | — | Pennsylvania |
| 67 | Elizabeth Galvin | 14 | Daughter | New Worker | Pennsylvania |
| 68 | Helen Galvin | 12 | Daughter | — | Pennsylvania |
| 69 | Francis Galvin | 9 | Son | — | Pennsylvania |
| 70 | Elaine Galvin | 7 | Daughter | — | Pennsylvania |
| 71 | Joan Galvin | 5 | Daughter | — | Pennsylvania |
| 72 | Marie Galvin | 1 | Daughter | — | Pennsylvania |
| 73 | Jerome Galvin | 36 | Brother | Erector Helper | Pennsylvania |
| 74 | Charles A. Co. Brown | 54 | Head | Blacksmith | Pennsylvania |
| 75 | Elizabeth Brown | 56 | Wife | — | Pennsylvania |
| 76 | William Miller | 51 | Head | Fireman | Virginia |
| 77 | Pearl Miller | 43 | Wife | — | Virginia |
| 78 | Edith Miller | 16 | Daughter | — | Virginia |
| 79 | Ethel Miller | 14 | Daughter | — | Maryland |
| 80 | Esther Miller | 9 | Daughter | — | Pennsylvania |
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)