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Mary Larkin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Larkin across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents John & Mary — first a spouse (b.~1916), then head of a 3-person household.
Age 24
b. ~1916
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Larkin |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1916 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Darlene Larkin | Daughter | — | ~1940 | |
| Edward Larkin | Head | — | 27 | ~1913 |
| Mary Larkin | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Cook, Illinois
Daughter, age 5
Cook, Illinois · implied b. ~1915 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkin |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | England |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 15
Cook, Illinois · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larkin |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 24
Cook-County, Illinois · implied b. ~1916 — 3 household members
| Surname | Larkin |
| Given Name | Mary |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| 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 Larkin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Larkin (~0.92 confidence) and mother Mary Larkin (~0.92 confidence) and father Frank Larkin (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Larkin
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Mary Larkin
b. ~1882
Source mother
● Household
· direct · ~0.92
Father
Frank Larkin
b. ~1897
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Larkin
Spouse · 1940 · age 24 · b. ~1916 · Illinois
★ You are viewing this record
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-t0627-00985-00814)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Anna Kujazyk | 36 | wife | — | Illinois |
| 42 | Edward Kujazyk | 15 | son | — | Illinois |
| 43 | Raymond Kujazyk | 12 | son | — | Illinois |
| 44 | Dorothy Kujazyk | 10 | daughter | — | Illinois |
| 45 | Dolores Kujazyk | 8 | daughter | — | Illinois |
| 46 | Theresa Kujazyk | 4 | daughter | — | Illinois |
| 47 | John Mocinski | 57 | head | Measurer | Poland |
| 48 | Jennie Mocinski | 53 | wife | — | Poland |
| 49 | George Mocinski | 18 | son | New Worker | Illinois |
| 50 | Joseph Mocinski | 16 | son | — | Illinois |
| 51 | Edward Mocinski | 16 | son | — | Illinois |
| 52 | Frank Mocinski | 30 | son | Laborer | Illinois |
| 53 | Irene Mocinski | 26 | daughter | Folder | Illinois |
| 54 | Joseph Maitynoski | 31 | head | Post Clerk | Illinois |
| 55 | Marian Maitynoski | 27 | wife | Inspector | Illinois |
| 56 | Edward Larkin | 27 | head | Pressman | Illinois |
| 57 | Mary Larkin THIS PERSON | 24 | wife | — | Illinois |
| 58 | Darlene Larkin | 0 | daughter | — | Illinois |
| 59 | Joseph Swinkiewicz | 63 | head | — | Poland |
| 60 | Mary Luszczynski | 50 | head | Dishwasher | Poland |
| 61 | Marie Kobylynski | 48 | head | — | Illinois |
| 62 | Arthur Kobylynski | 28 | son | Machine Hand | Illinois |
| 63 | Leonard Kobylynski | 27 | son | Machine Hand | Illinois |
| 64 | Frank Kobylynski | 23 | son | Machine Hand | Illinois |
| 65 | Ernest Kobylynski | 21 | son | Shipping Helper | Illinois |
| 66 | Marie Kobylynski | 11 | daughter | — | Illinois |
| 67 | George Mishreski | 29 | head | Fireman | Illinois |
| 68 | Alice Mishreski | 29 | wife | — | Illinois |
| 69 | Daniel Mishreski | 1 | son | — | Illinois |
| 70 | Mary Wilk | 58 | head | — | Poland |
| 71 | Victoria Wilk | 31 | daughter | Winder | Illinois |
| 72 | Catherine Wilk | 23 | daughter | Sewing Machine Operator | Illinois |
| 73 | Raymond Klabuvar | 23 | son in law | Box Maker | Illinois |
| 74 | Agnes Klabuvar | 29 | daughter | Sewing Machine Operator | Illinois |
| 75 | Mary Stajczyk | 26 | daughter | Power Machine Operator | Illinois |
| 76 | Rosalie Stajczyk | 0 | grand daughter | — | Illinois |
| 77 | James L Bashu | 32 | head | Foreman-Tanner | Arkansas |
| 78 | Delores Bashu | 32 | wife | — | New Mexico |
| 79 | Lorraine Bashu | 14 | daughter | — | Arkansas |
| 80 | James F Bashu | 13 | son | — | Illinois |
Pedigree Summary
Mary
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)