MT
Mary Tracy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Tracy across the 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1890), then head of a 6-person household.
Age 50
b. ~1890
Female
Spouse
Born: Poland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Tracy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 5 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
| Township / Ward | Chicago |
| Est. Birth Year | ~1890 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Chester Tracy | Son | — | 14 | ~1926 |
| Frank Tracy | Son | — | 18 | ~1922 |
| Edward Tracy | Son | — | 17 | ~1923 |
| Mary Tracy | Spouse | — | 50 | ~1890 |
| John Tracy | Head | — | 52 | ~1888 |
| Mitchel Tracy | Son | — | 20 | ~1920 |
Census Appearances
1930
Cook, Illinois
Spouse, age 39
Cook, Illinois · implied b. ~1891 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tracy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Poland |
| Naturalization Status | Alien |
| Year of Immigration | 1909 |
| Age at First Marriage | 19 |
| Father's Birthplace | Poland |
| Mother's Birthplace | Poland |
| Can Read/Write | Yes |
| Mother Tongue | Polish |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
1940
Cook-County, Illinois
Spouse, age 50
Cook-County, Illinois · implied b. ~1890 — 6 household members
| Surname | Tracy |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Poland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Hours Worked | 5 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth Country | Poland |
| Birthplace (normalized) | poland |
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 Tracy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Tracy
Spouse · 1940 · age 50 · b. ~1890 · 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-t0627-00964-00242)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William J. Dhandzel | 12 | Son | — | Illinois |
| 42 | William O. Stolenburg | 46 | Head | Truck Driver | Illinois |
| 43 | Mae Stolenburg | 41 | Wife | — | Illinois |
| 44 | Ralph Stolenburg | 7 | Son | — | Illinois |
| 45 | Raphael Stolenburg | 2 | Daughter | — | Illinois |
| 46 | Dolores Grischi | 17 | Step-daughter | Fur Worker | Illinois |
| 47 | John J. Dielski | 50 | Head | Undertaker | Illinois |
| 48 | John Jr. Dielski | 17 | Son | — | Illinois |
| 49 | Annette Dielski | 14 | Daughter | — | Illinois |
| 50 | Vincent Kwan | 57 | Head | Cook | Poland |
| 51 | Regina Kwan | 45 | Wife | — | Poland |
| 52 | Antoinette Kwan | 21 | Daughter | Finisher | Illinois |
| 53 | Florence Kwan | 20 | Daughter | Touch Up | Illinois |
| 54 | Julian Kwan | 19 | Son | Punch Press | Illinois |
| 55 | Helen Kwan | 16 | Daughter | — | Illinois |
| 56 | Edward Kwan | 11 | Son | — | Illinois |
| 57 | John Fermanowski | 51 | Head | Laborer Wpa | Poland |
| 58 | Mary Fermanowski | 51 | Wife | — | Poland |
| 59 | John Tracy | 52 | Head | Laborer | Poland |
| 60 | Mary Tracy THIS PERSON | 50 | Wife | — | Poland |
| 61 | Mitchel Tracy | 20 | Son | Binder | Illinois |
| 62 | Frank Tracy | 18 | Son | Messenger Boy | Illinois |
| 63 | Edward Tracy | 17 | Son | — | Illinois |
| 64 | Chester Tracy | 14 | Son | — | Illinois |
| 65 | Bryan Brown | 39 | Head | Pharmacist | Louisiana |
| 66 | Ann Brown | 32 | Wife | — | Poland |
| 67 | Bryan Jr. Brown | 12 | Son | — | Illinois |
| 68 | George Brown | 10 | Son | — | Illinois |
| 69 | Ferdinand Stotzella | 60 | Head | Laborer Wpa | Poland |
| 70 | Anna Stotzella | 50 | Wife | — | Poland |
| 71 | Henry Stotzella | 12 | Son | — | Illinois |
| 72 | Stanley Buczek | 79 | Head | — | Poland |
| 73 | Helen Buczek | 67 | Wife | — | Poland |
| 74 | Eleanor Buczek | 24 | Daughter | Solderer | Illinois |
| 75 | William Gutowski | 34 | Head | Fur Worker | Illinois |
| 76 | Agnes Gutowski | 30 | Wife | — | Illinois |
| 77 | Casimir Dolba | 70 | Head | — | Poland |
| 78 | Thomas Dolba | 38 | Son | Tool Maker | Poland |
| 79 | John Kaminski | 66 | Lodger | Watchman | Poland |
| 80 | Mary Gill | 34 | Head | Fur Worker | Poland |
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)