MD
Mary Daley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Daley across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 7-person household.
Age 41
b. ~1899
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Daley |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Hours Worked | 45 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago |
| Est. Birth Year | ~1899 |
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 |
|---|---|---|---|---|
| Joseph Daley | Son | — | 15 | ~1925 |
| Mary Daley | Spouse | — | 41 | ~1899 |
| George Daley | Son | — | 8 | ~1932 |
| John Daley | Son | — | 6 | ~1934 |
| Thomas Daley | Son | — | 5 | ~1935 |
| William Daley | Head | — | 45 | ~1895 |
| William Daley | Son | — | 19 | ~1921 |
Census Appearances
1930
Cook, Illinois
Spouse, age 30
Cook, Illinois · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Duley |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 21 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 41
Cook-County, Illinois · implied b. ~1899 — 7 household members
| Surname | Daley |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Hours Worked | 45 |
| Highest Grade | H-4 |
| 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 Daley across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Daley
Spouse · 1940 · age 41 · b. ~1899 · Illinois
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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 — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00979-00128)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Susan Powell | 61 | Wife | — | Michigan |
| 42 | Roland Powell | 37 | Son | Printer | Wisconsin |
| 43 | Stanley Mickel | 28 | Boarder | — | Poland |
| 44 | Mary Mickel | 25 | Daughter | Diet Maid | Illinois |
| 45 | Joyce Mickel | 5 | Daughter | — | Illinois |
| 46 | Frank Mickel | 2 | Son | — | Illinois |
| 47 | Hugh W. Jones | 39 | Head | Drill Press Operator | Illinois |
| 48 | Verna Jones | 35 | Wife | — | Illinois |
| 49 | Clara Jones | 11 | Daughter | — | Illinois |
| 50 | Hugh Jones | 10 | Son | — | Illinois |
| 51 | Warren Jones | 8 | Son | — | Illinois |
| 52 | Mary Jones | 7 | Daughter | — | Illinois |
| 53 | Robert Jones | 5 | Son | — | Illinois |
| 54 | Walter Jones | 3 | Son | — | Illinois |
| 55 | John Jones | 0 | Son | — | Illinois |
| 56 | James H. Taylor | 37 | Head | Truck Driver | Ireland |
| 57 | Mary Taylor | 32 | Wife | — | Ireland |
| 58 | James Taylor | 7 | Son | — | Illinois |
| 59 | Robert Taylor | 4 | Son | — | Illinois |
| 60 | Sam Thallius | 32 | Head | Printer | Illinois |
| 61 | Rose Thallius | 32 | Wife | — | Tennessee |
| 62 | Donald Thallius | 15 | Son | — | Illinois |
| 63 | Wilbur Thallius | 14 | Son | — | Illinois |
| 64 | Anthony Lucia | 34 | Head | Folding Machine Operator | Italy |
| 65 | Theresa Lucia | 31 | Wife | — | Illinois |
| 66 | Lawrence Lucia | 11 | Son | — | Illinois |
| 67 | Robert Lucia | 8 | Son | — | Illinois |
| 68 | Anthony Lucia | 4 | Son | — | Illinois |
| 69 | Joseph De Lucia | 24 | Head | Clothes Presser | Illinois |
| 70 | Annette De Lucia | 21 | Wife | — | Illinois |
| 71 | Anthony De Lucia | 2 | Son | — | Illinois |
| 72 | Theresa De Lucia | 0 | Daughter | — | Illinois |
| 73 | William T. Daley | 45 | Head | Laborer | Illinois |
| 74 | Mary Daley THIS PERSON | 41 | Wife | — | Illinois |
| 75 | William A. Daley | 19 | Son | Radio Clerk | Illinois |
| 76 | Joseph Daley | 15 | Son | — | Illinois |
| 77 | George Daley | 8 | Son | — | Illinois |
| 78 | John Daley | 6 | Son | — | Illinois |
| 79 | Thomas Daley | 5 | Son | — | Illinois |
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)