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Mary Kennedy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Kennedy across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1881), then head of a 6-person household.
Age 59
b. ~1881
Female
Head
Born: Ireland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Kennedy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chicago |
| Est. Birth Year | ~1881 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Muriel Kennedy | Daughter | — | 28 | ~1912 |
| Rita Kennedy | Daughter | — | 18 | ~1922 |
| Mary Kennedy | Head | — | 59 | ~1881 |
| James Kennedy | Son | — | 31 | ~1909 |
| Vincent Kennedy | Son | — | 21 | ~1919 |
| Edward Kennedy | Son | — | 26 | ~1914 |
Census Appearances
1920
Cook, Illinois
Spouse, age 38
Cook, Illinois · implied b. ~1882 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Ireland |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Irish |
| Birth Country | Ireland |
| Year of Naturalization | 1905 |
| Birthplace (normalized) | ireland |
Spouse, age 47
Cook, Illinois · implied b. ~1883 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kennedy |
| Given Name | Margaret |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1912 |
| Age at First Marriage | 23 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | Gaelic |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Head, age 59
Cook-County, Illinois · implied b. ~1881 — 6 household members
| Surname | Kennedy |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 59 |
| Marital Status | Widowed |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Class of Worker | 0 |
| Highest Grade | H 4 |
| 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 Kennedy 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 Kennedy
Head · 1940 · age 59 · b. ~1881 · 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-t0627-00930-00269)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mischa Rubin | 28 | Lodger | Lawyer | Russia |
| 2 | Bernard Chalifay | 22 | Lodger | Reporter | Russia |
| 3 | Morris Balfour | 71 | Head | Carpenter | Poland |
| 4 | Reuben Balfour | 26 | Son | Newsman | Illinois |
| 5 | Lionel Balfour | 21 | Son | New Worker | Illinois |
| 6 | Robert Balfour | 16 | Son | — | Illinois |
| 7 | Sadie Wershinsky | 36 | Daughter | — | Illinois |
| 8 | Andrew Wershinsky | 34 | Son | Janitor | Russia |
| 9 | Theresa Hirsch | 69 | Head | — | Germany |
| 10 | Sophie Hirsch | 46 | Daughter | Switchboard | Illinois |
| 11 | Adeline Hirsch | 40 | Daughter | Salesman | Illinois |
| 12 | Michael Balfrey | 58 | Head | Repair Man | Lithuania |
| 13 | Gertrude Balfrey | 60 | Wife | — | England |
| 14 | Lucy Balfrey | 34 | Daughter | Typist | Missouri |
| 15 | Paulina Cohen | 72 | Head | — | Lithuania |
| 16 | Florence Cohen | 26 | Daughter | Clerk | Illinois |
| 17 | Robert Mooney | 29 | Head | Teacher | Missouri |
| 18 | Christine Mooney | 29 | Wife | — | South Dakota |
| 19 | Mary Mooney | 7 | Daughter | — | Illinois |
| 20 | Julia Mooney | 3 | Daughter | — | Illinois |
| 21 | Charles Leckrone | 68 | Head | Teacher | Ohio |
| 22 | Ethel Leckrone | 59 | Wife | — | Indiana |
| 23 | Carrie Simmons | 70 | Head | — | Iowa |
| 24 | Lucille Simmons | 46 | Daughter | Secretary | Illinois |
| 25 | Samuel Brothman | 45 | Head | Own Store | Russia |
| 26 | Anne Brothman | 39 | Wife | — | Illinois |
| 27 | Ruth Brothman | 15 | Daughter | — | Illinois |
| 28 | Leon Brothman | 8 | Son | — | Illinois |
| 29 | James Fleming | 45 | Head | Clerk | Illinois |
| 30 | Lucille Fleming | 43 | Wife | — | Illinois |
| 31 | Paul Proue | 66 | Head | Elevator Operator | Belgium |
| 32 | Marie Proue | 64 | Wife | — | Belgium |
| 33 | Mary Kennedy THIS PERSON | 59 | Head | — | Ireland |
| 34 | James Kennedy | 31 | Son | Laborer | Illinois |
| 35 | Muriel Kennedy | 28 | Daughter | Chemist | Illinois |
| 36 | Edward Kennedy | 26 | Son | Clerk | Illinois |
| 37 | Vincent Kennedy | 21 | Son | Jr. Clerk | Illinois |
| 38 | Rita Kennedy | 18 | Daughter | — | Illinois |
| 39 | Edward Dieterle | 38 | Head | Private Collector | Ohio |
| 40 | Agnes Dieterle | 38 | 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)