MS
Mary Saunders — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Saunders across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1914), then head of a 10-person household.
Age 26
b. ~1914
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Saunders |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Gen. Office wk |
| Industry | Engineers Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 864 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Gen. Office Wk |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1914 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Richard Saunders | Son | — | 10 | ~1930 |
| Catherine Saunders | Daughter | — | 20 | ~1920 |
| Donald Saunders | Son | — | 21 | ~1919 |
| James Saunders | Son | — | 24 | ~1916 |
| Rita Saunders | Daughter | — | 13 | ~1927 |
| Rose Saunders | Daughter | — | 18 | ~1922 |
| Robert Saunders | Son | — | 15 | ~1925 |
| Kate Saunders | Spouse | — | 53 | ~1887 |
| Mary Saunders | Daughter | — | 26 | ~1914 |
| Victor Saunders | Head | — | 54 | ~1886 |
Census Appearances
1930
Cook, Illinois
Daughter, age 13
Cook, Illinois · implied b. ~1917 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Saunders |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Michigan |
| Occupation | none |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 26
Cook-County, Illinois · implied b. ~1914 — 10 household members
| Surname | Saunders |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Occupation | Gen. Office wk |
| Industry | Engineers Co |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 864 |
| Highest Grade | Hs 4 |
| 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 Mary Saunders across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Saunders
Daughter · 1940 · age 26 · b. ~1914 · Illinois
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Sibling
Robert Saunders
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Saunders
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Saunders
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Saunders
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Saunders
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Saunders
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Saunders
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
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-t0627-00999-00709)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jacob Spielman | 45 | Head | Laundry | Russia |
| 2 | Celia Spielman | 39 | Wife | — | Russia |
| 3 | Herman Spielman | 21 | Son | Office Wk | Illinois |
| 4 | Alvin Spielman | 16 | Son | — | Illinois |
| 5 | Lester Spielman | 13 | Son | — | Illinois |
| 6 | Jenny Caprata | 73 | Head | — | Austria Hung. |
| 7 | Charles Caprata | 46 | Son | Policeman | Illinois |
| 8 | Gladys Mangini | 31 | Daughter | — | Illinois |
| 9 | Thomas Mangini | 33 | Son in law | Office Work | Illinois |
| 10 | Dorthy Canberry | 22 | Gr Daugh | Eleva. Oper. | Illinois |
| 11 | Arno Hendel | 50 | Head | Embrod. Design | Germany |
| 12 | Margaret Hendel | 50 | Wife | — | Germany |
| 13 | Elsie Schweb | 27 | Daughter | Millinery Sales | Germany |
| 14 | Oscar Schweb | 30 | Son in law | Tavern Keeper | Germany |
| 15 | — | None | — | — | — |
| 16 | Emil Lahaan | 76 | Head | — | Iowa |
| 17 | Bertha Lahaan | 73 | Wife | — | Germany |
| 18 | Laura Lahaan | 31 | Daughter | Stenog. | Illinois |
| 19 | Marie Lahaan | 30 | Daughter | Stenog. | Illinois |
| 20 | Victor L Saunders | 54 | Head | Credit Mang. | Illinois |
| 21 | Kate Saunders | 53 | Wife | — | Ireland |
| 22 | Mary Saunders THIS PERSON | 26 | Daughter | Gen. Office Wk | Illinois |
| 23 | James Saunders | 24 | Son | — | Illinois |
| 24 | Donald Saunders | 21 | Son | Floor Boy | Illinois |
| 25 | Catherine Saunders | 20 | Daughter | Clerk | Illinois |
| 26 | Rose P Saunders | 18 | Daughter | Page Girl | Illinois |
| 27 | Robert J Saunders | 15 | Son | — | Illinois |
| 28 | Rita T Saunders | 13 | Daughter | — | Illinois |
| 29 | Richard Saunders | 10 | Son | — | Illinois |
| 30 | John Schmidt | 52 | Head | Janitor | Austria |
| 31 | Emma Schmidt | 48 | Wife | — | Austria |
| 32 | Frank Schmidt | 24 | Son | Janitor | Mich. |
| 33 | Otto Schmidt | 21 | Son | Printing | Mich. |
| 34 | John Schmidt | 18 | Son | — | Mich. |
| 35 | Irene Schmidt | 12 | Daughter | — | Illinois |
| 36 | Frank Walters | 57 | Head | Electrician | Italy |
| 37 | Agnes Walters | 56 | Wife | — | Poland |
| 38 | Bruno Walters | 30 | Son | — | Illinois |
| 39 | Edwin Walters | 24 | Son | Eleva. Oper. | 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)