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Margaret Mason — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Margaret Mason across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1893), then head of a 5-person household.
Age 47
b. ~1893
Female
Spouse
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Mason |
| Given Name | Margaret L. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1893 |
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 |
|---|---|---|---|---|
| William Mason | Son | — | 18 | ~1922 |
| Joseph Mason | Son | — | 16 | ~1924 |
| William Mason | Head | — | 49 | ~1891 |
| Margaret Mason | Spouse | — | 47 | ~1893 |
| Margaret Mason | Daughter | — | 8 | ~1932 |
Census Appearances
1920
Cook, Illinois
Spouse, age 27
Cook, Illinois · implied b. ~1893 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Spouse, age 37
Cook, Illinois · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 26 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 47
Cook-County, Illinois · implied b. ~1893 — 5 household members
| Surname | Mason |
| Given Name | Margaret L. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Highest Grade | No 8 |
| 1935 Residence | Same house |
| 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 Mason 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 Mason
Spouse · 1940 · age 47 · b. ~1893 · 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
40 people indexed on this census page (nara:1940:m-t0627-00940-00939)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Jansen | 27 | son | Machine Operator | Illinois |
| 42 | Robert Jansen | 23 | son | Painting | Illinois |
| 43 | Joseph Deminski | 81 | lodger | — | Germany |
| 44 | Joseph Malyszczyk | 50 | head | Grain Shoveler | Poland |
| 45 | Catherine Malyszczyk | 41 | wife | — | Poland |
| 46 | John Malyszczyk | 22 | son | Grain Shoveler | Illinois |
| 47 | Joseph Malyszczyk | 21 | son | Grain Shoveler | Illinois |
| 48 | Anna Malyszczyk | 19 | daughter | Power Machine Oper. | Illinois |
| 49 | Walter Malyszczyk | 17 | son | — | Illinois |
| 50 | Gertrude Malyszczyk | 15 | daughter | — | Illinois |
| 51 | Edward Malyszczyk | 12 | son | — | Illinois |
| 52 | William Malyszczyk | 8 | son | — | Illinois |
| 53 | Angeline Malyszczyk | 6 | daughter | — | Illinois |
| 54 | Eleanor Malyszczyk | 3 | daughter | — | Illinois |
| 55 | Eugene Malyszczyk | 1 | son | — | Illinois |
| 56 | A. Joseph Lally | 40 | head | Estimator | Illinois |
| 57 | Agnes Lally | 37 | wife | Comptometer | Illinois |
| 58 | Shirley Lally | 13 | daughter | — | Illinois |
| 59 | Henry Breschler | 42 | head | Machinist | Illinois |
| 60 | Clara Breschler | 39 | wife | — | Illinois |
| 61 | James Breschler | 16 | son | — | Illinois |
| 62 | Ronald Breschler | 11 | son | — | Illinois |
| 63 | William A. Mason | 49 | head | Stationery Engineer | Illinois |
| 64 | Margaret L. Mason THIS PERSON | 47 | wife | — | Illinois |
| 65 | William B. Mason | 18 | son | — | Illinois |
| 66 | Joseph H. Mason | 16 | son | — | Illinois |
| 67 | Margaret Mason | 8 | daughter | — | Illinois |
| 68 | Albert Vitterella | 42 | head | Tavern Keeper | Italy |
| 69 | Palma Vitterella | 30 | wife | — | Illinois |
| 70 | Ada Vitterella | 5 | daughter | — | Illinois |
| 71 | Reno Vitterella | 2 | son | — | Illinois |
| 72 | Antonio Sardone | 68 | head | — | Italy |
| 73 | John Sardone | 39 | son | Truck Driver | Italy |
| 74 | Mary Sardone | 30 | daughter | — | Italy |
| 75 | Phyllis Sardone | 9 | grand-daughter | — | Illinois |
| 76 | John Jr. Sardone | 7 | grand-son | — | Illinois |
| 77 | Richard Sardone | 26 | son | Hauling | Illinois |
| 78 | Rachel Sardone | 29 | daughter | Cook | Italy |
| 79 | Anton Talash | 40 | head | Salesman | Illinois |
| 80 | Bernice Talash | 36 | wife | — | 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)