MN
Mary Novak — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Novak across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1913), then head of a 7-person household.
Age 27
b. ~1913
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Novak |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Additional Details | |
| Occupation | Operator |
| Industry | Publishing firm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Operator |
| Township / Ward | Chicago City |
| 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anna Novak | Daughter | — | 24 | ~1916 |
| James Novak | Head | — | 53 | ~1887 |
| Anna Novak | Spouse | — | 50 | ~1890 |
| Rose Novak | Daughter | — | 19 | ~1921 |
| John Novak | Son | — | 14 | ~1926 |
| George Novak | Son | — | 14 | ~1926 |
| Mary Novak | Daughter | — | 27 | ~1913 |
Census Appearances
1930
Cook, Illinois
Daughter, age 17
Cook, Illinois · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Novak |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Occupation | none |
| 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 — 7 household members
| Surname | Novak |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago city |
| 1935 Residence (County) | Cook |
| Occupation | Operator |
| Industry | Publishing firm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 936 |
| Highest Grade | No 7 |
| 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 Mary Novak across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Novak
Daughter · 1940 · age 27 · b. ~1913 · Illinois
★ You are viewing this record
Sibling
Anna Novak
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Novak
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rose Novak
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Novak
Sibling · 1940 · age 14
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-t0627-00950-00238)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James G. Novak | 53 | Head | Elevator Operator | Illinois |
| 2 | Anna Novak | 50 | Wife | Housework | Illinois |
| 3 | Mary Novak THIS PERSON | 27 | Daughter | Operator | Illinois |
| 4 | Anna Novak | 24 | Daughter | New Worker | Illinois |
| 5 | Rose Novak | 19 | Daughter | Pressgraph Operator | Illinois |
| 6 | John Novak | 14 | Son | — | Illinois |
| 7 | George Novak | 14 | Son | — | Illinois |
| 8 | Stanley Siemieniewski | 42 | Head | Dies Boy Car | Poland |
| 9 | Bernice Siemieniewski | 34 | Wife | Beauty Parlor | Poland |
| 10 | Lorraine Siemieniewski | 13 | Daughter | — | Illinois |
| 11 | Stanley Czajewski | 37 | Head | Skin Packer | Poland |
| 12 | Lottie Czajewski | 30 | Wife | Gut Washer | Poland |
| 13 | Casper Czajewski | 11 | Son | — | Poland |
| 14 | Ann Zawadzki | 24 | Head | Liquor Clerk | Illinois |
| 15 | William Zawadzki | 26 | Husband | Liquor Clerk | South Dakota |
| 16 | Carol Zawadzki | 3 | Daughter | — | Illinois |
| 17 | Robert Zawadzki | 1 | Son | — | Illinois |
| 18 | Kasper Dziubak | 44 | Head | Salesman | Poland |
| 19 | Julius Dziubak | 25 | Son | — | Illinois |
| 20 | Walter Paryzinski | 25 | Son-in-law | Dentist | Illinois |
| 21 | Helen Paryzinski | 24 | Daughter | — | Illinois |
| 22 | Anna Plonowski | 42 | Sister | Dressmaker | Poland |
| 23 | Frank J. Prekel | 27 | Head | Shipping Clerk | Illinois |
| 24 | Lillian Prekel | 26 | Wife | — | Illinois |
| 25 | Patricia Prekel | 2 | Daughter | — | Illinois |
| 26 | David Foley | 26 | Head | Optometrist | Illinois |
| 27 | Helen Foley | 24 | Wife | — | Illinois |
| 28 | John Miskowiec | 31 | Head | Tin Plate Finisher | Illinois |
| 29 | Helen Miskowiec | 27 | Wife | Binding Machine Operator | New York |
| 30 | Wayne Miskowiec | 5 | Son | — | Illinois |
| 31 | Jerome Miskowiec | 2 | Son | — | Illinois |
| 32 | Sophia Miskowiec | 52 | Mother | Sausage Linker | Austria |
| 33 | Joseph Miskowiec | 23 | Brother | Pressman Apprentice | Illinois |
| 34 | Josephine Mroczkowski | 32 | Head | Laborer | Poland |
| 35 | Walter Janowski | 55 | Head | Sausage Maker & Truck Driver | Poland |
| 36 | Rosalie Janowski | 45 | Wife | — | Illinois |
| 37 | Helen Karoski | 32 | Sister-in-law | Seamstress | Illinois |
| 38 | Minnie Paukszta | 37 | Head | — | Poland |
| 39 | Anthony Paukszta | 18 | Son | — | Illinois |
| 40 | Lydia Paukszta | 16 | Daughter | — | 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)