ML
Mary Laughlin — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Laughlin across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1922), then head of a 7-person household.
Age 18
b. ~1922
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Laughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Arlington Heights Village |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Librarian |
| Industry | Social work |
| Class of Worker | PW |
| Hours Worked | 5 |
| Income (1939) | 48 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Librarian |
| Township / Ward | Arlington Heights Village |
| Est. Birth Year | ~1922 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Eileen Laughlin | Daughter | — | 17 | ~1923 |
| Mary Laughlin | Spouse | — | 42 | ~1898 |
| Mary Laughlin | Daughter | — | 18 | ~1922 |
| Edward Laughlin | Son | — | 13 | ~1927 |
| Richard Laughlin | Son | — | 11 | ~1929 |
| James Laughlin | Head | — | 48 | ~1892 |
| James Laughlin | Son | — | 14 | ~1926 |
Census Appearances
1930
Cook, Illinois
Daughter, age 7
Cook, Illinois · implied b. ~1923 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Laughlin |
| Given Name | Mary Alice |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 18
Cook-County, Illinois · implied b. ~1922 — 7 household members
| Surname | Laughlin |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Arlington Heights Village |
| 1935 Residence (County) | Cook |
| Occupation | Librarian |
| Industry | Social work |
| Class of Worker | PW |
| Hours Worked | 5 |
| Income (1939) | 48 |
| Highest Grade | H-4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Laughlin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Laughlin
Daughter · 1940 · age 18 · b. ~1922 · Illinois
★ You are viewing this record
Sibling
Edward Laughlin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Laughlin
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Eileen Laughlin
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Laughlin
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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00777-00718)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joan Keppler | 2 | Daughter | — | Illinois |
| 2 | Donald Keppler | 0 | Son | — | Illinois |
| 3 | Christ Madsen | 50 | Head | Manager | Denmark |
| 4 | Goldie Madsen | 44 | Wife | — | Illinois |
| 5 | M. J. Gackett | 39 | Head | Salesman | Indiana |
| 6 | Elizabeth Gackett | 38 | Wife | — | Michigan |
| 7 | Leonard Webster | 42 | Head | Salesman | Illinois |
| 8 | Linda Webster | 42 | Wife | — | Ohio |
| 9 | Paul Vawter | 32 | Head | Manager | Indiana |
| 10 | Betty Vawter | 31 | Wife | — | Indiana |
| 11 | Willard Walters | 37 | Head | Lawyer | Minnesota |
| 12 | Mary Walters | 27 | Wife | — | Iowa |
| 13 | Mary Walters | 5 | Daughter | — | Illinois |
| 14 | Judith Walters | 4 | Daughter | — | Illinois |
| 15 | Susan Walters | 2 | Daughter | — | Illinois |
| 16 | Robert Lucas | 24 | Head | Mechanical Engineer | Indiana |
| 17 | Joanna Lucas | 25 | Wife | — | Ohio |
| 18 | David Lucas | 0 | Son | — | Illinois |
| 19 | Abiel Johnson | 49 | Head | Jeweler | Illinois |
| 20 | Shirley Johnson | 43 | Wife | — | Michigan |
| 21 | Thurman J. Dodge | 40 | Head | Wholesale Salesman | Wisconsin |
| 22 | Virginia Dodge | 34 | Wife | Post Mistress | Illinois |
| 23 | Donald Captain | 32 | Head | Maintenance | South Dakota |
| 24 | Virginia Captain | 30 | Wife | — | South Dakota |
| 25 | Richard Captain | 5 | Son | — | Illinois |
| 26 | Robert Captain | 3 | Son | — | Illinois |
| 27 | James Thomas | 35 | Head | Office Work | Illinois |
| 28 | Margaret Thomas | 34 | Wife | — | Illinois |
| 29 | Patricia Thomas | 14 | Daughter | — | Illinois |
| 30 | James D. Thomas | 5 | Son | — | Illinois |
| 31 | Harold Shellberg | 37 | Head | Purchasing Agent | Illinois |
| 32 | Ruth Shellberg | 35 | Wife | — | California |
| 33 | James Laughlin | 48 | Head | Linotype Operator | Minnesota |
| 34 | Mary Laughlin | 42 | Wife | — | Illinois |
| 35 | Mary Laughlin THIS PERSON | 18 | Daughter | Librarian | Illinois |
| 36 | Eileen Laughlin | 17 | Daughter | — | Illinois |
| 37 | James Laughlin | 14 | Son | — | Illinois |
| 38 | Edward Laughlin | 13 | Son | — | Illinois |
| 39 | Richard Laughlin | 11 | Son | — | Illinois |
| 40 | Ross Richards | 33 | Head | Insurance Adjusting | 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)