MW
Mary Wagner — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Wagner across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed), with identified parents Louis & John — first a daughter (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Female
Daughter
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Wagner |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Senior Clerk |
| Industry | Library Project |
| Class of Worker | GW |
| Hours Worked | 35 |
| Income (1939) | 206 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Senior Clerk |
| Township / Ward | Chicago |
| Est. Birth Year | ~1913 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Wagner | Daughter | — | 27 | ~1913 |
| Mary Holden | Head | — | 59 | ~1881 |
| James Wagner | Other | — | 14 | ~1926 |
| John Wagner | Other | — | 5 | ~1935 |
| John Holden | Son | — | 31 | ~1909 |
Census Appearances
1920
Cook, Illinois
Daughter, age 7
Cook, Illinois · implied b. ~1913 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wagner |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Daughter, age 18
Cook, Illinois · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Wagner |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Stenographer |
| Industry | Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Daughter, age 27
Cook-County, Illinois · implied b. ~1913 — 5 household members
| Surname | Wagner |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Occupation | Senior Clerk |
| Industry | Library Project |
| Class of Worker | GW |
| Hours Worked | 35 |
| Income (1939) | 206 |
| 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 Wagner across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Louis Wagner (~0.92 confidence) and father John Wagner (~0.92 confidence) and mother Johanna Wagner (~0.92 confidence) and mother Mary Holden (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Louis Wagner
b. ~1871
Source father
● Household
· direct · ~0.92
Father
John Wagner
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Johanna Wagner
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Mary Holden
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Wagner
Daughter · 1940 · age 27 · b. ~1913 · Illinois
★ You are viewing this record
Sibling
John Holden
Sibling · 1940 · age 31
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
40 people indexed on this census page (nara:1940:m-t0627-00981-00556)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Doll, Gerald Doll | 9 | Son | — | Illinois |
| 42 | Albert Richardson | 40 | Head | Shipping Clerk | Illinois |
| 43 | Elsie Richardson | 38 | Wife | — | Illinois |
| 44 | Albert E. Jr. Richardson | 16 | Son | — | Illinois |
| 45 | George K. Richardson | 13 | Son | — | Illinois |
| 46 | Joan L. Richardson | 12 | Daughter | — | Illinois |
| 47 | John L. Richardson | 10 | Son | — | Illinois |
| 48 | Thomas W. Richardson | 71 | Father | — | England |
| 49 | Annie Richardson | 71 | Mother-in-law | — | England |
| 50 | George Petters | 48 | Head | Cook | Greece |
| 51 | Evangeline Petters | 41 | Wife | — | Wisconsin |
| 52 | John Petters | 17 | Son | — | Illinois |
| 53 | Peter Petters | 16 | Son | — | Wisconsin |
| 54 | Evangeline Petters | 15 | Daughter | — | Illinois |
| 55 | Donald Marvin | 26 | Head | Rug Weaver | Illinois |
| 56 | Margaret B. Marvin | 23 | Wife | — | Illinois |
| 57 | Albert Marvin | 4 | Son | — | Illinois |
| 58 | Ronald Marvin | 1 | Son | — | Illinois |
| 59 | Dominick Oramich | Gramich | 73 | Head | — | Lithuania |
| 60 | Justina Zubersky | 58 | Wife | — | Lithuania |
| 61 | Bertha Zubersky | 25 | Daughter | — | Illinois |
| 62 | John Zubersky | 3 | Grand-Son | — | New York |
| 63 | Michael Trentadue | 40 | Head | Candy Maker | Italy |
| 64 | Jennie Trentadue | 32 | Wife | Candy Packer | Illinois |
| 65 | Antoinette Trentadue | 11 | Daughter | — | Illinois |
| 66 | Victor Trentadue | 8 | Son | — | Illinois |
| 67 | Otto A. May | 42 | Head | Truck Driver | Illinois |
| 68 | Mary May | 34 | Wife | — | Illinois |
| 69 | Otto D. May | 13 | Son | — | Illinois |
| 70 | Mary Anne May | 3 | Daughter | — | Illinois |
| 71 | Mary Holden | 59 | Head | — | Illinois |
| 72 | John T. Holden | 31 | Son | Bookkeeper | Illinois |
| 73 | Mary Wagner THIS PERSON | 27 | Daughter | Senior Clerk | Illinois |
| 74 | John Wagner | 5 | Son-in-law | — | Illinois |
| 75 | James Wagner | 14 | Grand-Son | — | Illinois |
| 76 | Thomas Fitzpatrick | 64 | Head | Truck Driver | Illinois |
| 77 | Elizabeth Fitzpatrick | 54 | Wife | — | Illinois |
| 78 | Michael Prindiville | 51 | Brother-in-law | — | Illinois |
| 79 | Roger Cox | 41 | Head | Dept. Manager | Iowa |
| 80 | Bernice Cox | 40 | Wife | — | Illinois |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)