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 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1862), then head of a 4-person household.
Age 78
b. ~1862
Female
Spouse
Born: Ireland
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 | 78 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chicago |
| Est. Birth Year | ~1862 |
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 |
|---|---|---|---|---|
| Marie Daley | Daughter | — | 40 | ~1900 |
| Jeremiah Daley | Head | — | 80 | ~1860 |
| Frances Daley | Daughter | — | 34 | ~1906 |
| Mary Daley | Spouse | — | 78 | ~1862 |
Census Appearances
1920
Cook, Illinois
Head, age 54
Cook, Illinois · implied b. ~1866 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Daley |
| Given Name | Margaret |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 54 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
Spouse, age 65
Cook, Illinois · implied b. ~1865 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Daly |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 65 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1880 |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Spouse, age 78
Cook-County, Illinois · implied b. ~1862 — 4 household members
| Surname | Daley |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 78 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Industry | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Daley
Spouse · 1940 · age 78 · b. ~1862 · 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-t0627-00956-00855)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Arthur Jr Lindgrist | 12 | Son | — | Illinois |
| 42 | Shirley Lindgrist | 16 | Daughter | — | Illinois |
| 43 | Thomas Webb | 26 | Head | — | England |
| 44 | Jeanette Webb | 24 | Wife | — | Illinois |
| 45 | Thomas Hayes | 34 | Head | Fruiterer | Greece |
| 46 | Theresa Hayes | 30 | Wife | — | Illinois |
| 47 | John Jr Hayes | 14 | Son | — | Illinois |
| 48 | Anton Carlson | 57 | Head | Patternmaker | Sweden |
| 49 | Edna Carlson | 46 | Wife | — | Illinois |
| 50 | Elmer Carlson | 15 | Son | — | Illinois |
| 51 | Harriett White | 60 | Head | — | Illinois |
| 52 | Harriett A White | 28 | Daughter | Comptometer Operator | Illinois |
| 53 | William Armstrong | 21 | Lodger | Blue Print Maker | Illinois |
| 54 | Joseph O'Neil | 19 | Lodger | Messenger | Illinois |
| 55 | James O'Connor | 13 | Lodger | — | Illinois |
| 56 | Lawrence Mcauley | 13 | Lodger | — | Illinois |
| 57 | Josephine Knudsen | 70 | Head | — | Sweden |
| 58 | Amy Knudsen | 40 | Daughter | Stenographer | Illinois |
| 59 | Jeremiah Daley | 80 | Head | — | Ireland |
| 60 | Mary Daley THIS PERSON | 78 | Wife | — | Ireland |
| 61 | Marie Daley | 40 | Daughter | — | Illinois |
| 62 | Frances Daley | 34 | Daughter | Office Clerk | Illinois |
| 63 | Julia Doran | 72 | Head | — | Ireland |
| 64 | Anna Doran | 42 | Daughter | — | Illinois |
| 65 | Catherine Doran | 39 | Daughter | Operator | Illinois |
| 66 | Rose Doran | 33 | Daughter | Teacher | Illinois |
| 67 | William Chancellor | 39 | Head | Auto-Mechanic | Kentucky |
| 68 | Marie Chancellor | 35 | Wife | — | Illinois |
| 69 | Evelyn Hulsmann | 8 | Daughter | — | Illinois |
| 70 | Robert Chancellor | 5 | Son | — | Illinois |
| 71 | Frank Newport | 33 | Head | Salesman | Illinois |
| 72 | Marian Newport | 30 | Wife | — | Illinois |
| 73 | Marian Newport | 8 | Daughter | — | Illinois |
| 74 | Charles Newport | 2 | Son | — | Illinois |
| 75 | Clifford Huis | 38 | Head | Milk Driver | Illinois |
| 76 | Helen Huis | 37 | Wife | — | Illinois |
| 77 | Lorraine Huis | 16 | Daughter | — | Illinois |
| 78 | Harry Somers | 41 | Head | Physician | Illinois |
| 79 | Frances Somers | 36 | Wife | — | Illinois |
Related Census Records
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)