MC
Margaret Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Margaret Clark across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 5-person household.
Age 41
b. ~1899
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Clark |
| Given Name | Margaret A. |
| 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 | |
| Highest Grade | Hs 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Bryan Clark | Head | — | 44 | ~1896 |
| Mary Collins | Other | — | 62 | ~1878 |
| Edward Clark | Son | — | 20 | ~1920 |
| Raymond Clark | Son | — | 18 | ~1922 |
| Margaret Clark | Spouse | — | 41 | ~1899 |
Census Appearances
1920
Cook, Illinois
Spouse, age 20
Cook, Illinois · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clarke |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Spouse, age 30
Cook, Illinois · implied b. ~1900 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 28 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| 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 — 5 household members
| Surname | Clark |
| Given Name | Margaret A. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | Hs 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 Margaret Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Margaret Clark
Spouse · 1940 · age 41 · b. ~1899 · 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-t0627-00994-00306)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Catherine Joyce | 4 | Daughter | — | Illinois |
| 42 | Francis O'Bourne | 28 | Lodger | Manager | Wisconsin |
| 43 | John W. Warrington | 25 | Head | Owner | Illinois |
| 44 | Helen Warrington | 29 | Wife | — | Illinois |
| 45 | Noreen Warrington | 1 | Daughter | — | Illinois |
| 46 | Kenneth O. Henson | 30 | Head | Dentist | Illinois |
| 47 | Virginia Henson | 30 | Wife | Stenographer | Illinois |
| 48 | Christian Weyer | 54 | Head | Milk Vendor | Illinois |
| 49 | Lucy A. Weyer | 52 | Wife | — | Wisconsin |
| 50 | James Greene | 23 | Lodger | Traffic Rate Clerk | Illinois |
| 51 | Grace Bisson | 25 | Lodger | Receptionist | Illinois |
| 52 | Bryan H. Clark | 44 | Head | Laborer | Illinois |
| 53 | Margaret A. Clark THIS PERSON | 41 | Wife | — | Illinois |
| 54 | Edward H. Clark | 20 | Son | Shipping Clk | Illinois |
| 55 | Raymond Clark | 18 | Son | Office Boy | Illinois |
| 56 | Mary Collins | 62 | Mother-in-law | — | Illinois |
| 57 | Joe Hezlara | 30 | Head | Manager | Illinois |
| 58 | Margaret Hezlara | 34 | Wife | — | Illinois |
| 59 | Hezlara | 2 | Daughter | — | Illinois |
| 60 | John Eiler | 58 | Head | Packer - Boxer Candy | Jugo-Slavia |
| 61 | Elizabeth Eiler | 53 | Wife | — | Jugo-Slavia |
| 62 | Kenneth Hubbard | 37 | Head | Sheet Metal Worker | Wisconsin |
| 63 | Irene Hubbard | 30 | Wife | — | Iowa |
| 64 | Bernard Hubbard | 7 | Son | — | Iowa |
| 65 | Kenneth Hubbard | 3 | Son | — | Illinois |
| 66 | Josephine Hogan | 66 | Head | — | Michigan |
| 67 | James Hogan | 29 | Son | Shipping Clerk | Illinois |
| 68 | James Bagley | 42 | Son-in-law | Stock Clerk | Illinois |
| 69 | Josephine Bagley | 27 | Daughter | — | Illinois |
| 70 | Tom Lichtenberger | 63 | Head | Electrician | Illinois |
| 71 | Bertha Lichtenberger | 55 | Wife | — | Illinois |
| 72 | Geo W. Sherreffe | 27 | Son-in-law | Insurance Agt | Scotland |
| 73 | Bertha Sherreffe | 24 | Daughter | Waitress | Illinois |
| 74 | Geo Jr. Sherreffe | 5 | Grand Son | — | Illinois |
| 75 | James Laccrabue | 30 | Head | Drill Press Oper | Iowa |
| 76 | Anna Laccrabue | 27 | Wife | Waitress | New York |
| 77 | Ronald Laccrabue | 8 | Son | — | Illinois |
| 78 | Fred Laccrabue | 6 | Son | — | Illinois |
| 79 | Otto Quelle | 54 | Head | Plumber | Iowa |
| 80 | Ella Quelle | 50 | Wife | — | Iowa |
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)