MZ
Mary Zimmerman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Mary Zimmerman across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1867), then head of a 5-person household.
Age 73
b. ~1867
Female
Spouse
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Zimmerman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Same Place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1867 |
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 Zimmerman | Daughter | — | 48 | ~1892 |
| Magnus Zimmerman | Head | — | 69 | ~1871 |
| Catherine Zimmerman | Other | — | 47 | ~1893 |
| Richard Zimmerman | Son | — | 49 | ~1891 |
| Mary Zimmerman | Spouse | — | 73 | ~1867 |
Census Appearances
1920
Cook, Illinois
Spouse, age 48
Cook, Illinois · implied b. ~1872 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1885 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Year of Naturalization | 1891 |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Spouse, age 62
Cook, Illinois · implied b. ~1868 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1885 |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Spouse, age 73
Cook-County, Illinois · implied b. ~1867 — 5 household members
| Surname | Zimmerman |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 73 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago City |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Highest Grade | 4 |
| 1935 Residence | Same Place |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Zimmerman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Zimmerman
Spouse · 1940 · age 73 · b. ~1867 · 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-t0627-00952-00676)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Emil Gold | 64 | Head | Fire Chief | Sweden |
| 2 | Bessie Gold | 61 | Wife | — | Pennsylvania |
| 3 | Sam Kendal | 27 | Head | Cost Clerk | So Dakota |
| 4 | Helen Kendal | 26 | Wife | — | Minnesota |
| 5 | Patricia Kendal | 2 | Daughter | — | Illinois |
| 6 | James Macitener | 26 | Head | Truck Driver | Illinois |
| 7 | Bernice Macitener | 23 | Wife | Fruit Grader | Illinois |
| 8 | Michael Meldazis | 33 | Head | Cutter | Illinois |
| 9 | Pearl Meldazis | 28 | Wife | — | Wisconsin |
| 10 | Norma Meldazis | 10 | Daughter | — | Illinois |
| 11 | Franklin Meldazis | 7 | Son | — | Illinois |
| 12 | Bruno Haller | 38 | Head | Fire Sprinkler | Indiana |
| 13 | Bernadine Haller | 35 | Wife | — | Illinois |
| 14 | Edward Hogan | 37 | Head | Yard Clerk | Pennsylvania |
| 15 | Nellie Hogan | 37 | Wife | — | Pennsylvania |
| 16 | Shirley Hogan | 6 | Daughter | — | Illinois |
| 17 | Edward Hogan | 3 | Son | — | Illinois |
| 18 | Carol Hogan | 1 | Daughter | — | Illinois |
| 19 | Robert Van Reemadyk | 29 | Head | Laboratory Tech | Illinois |
| 20 | Katherine Van Reemadyk | 26 | Wife | Secretary | Illinois |
| 21 | Carl E. Leaf | 47 | Head | Bricklayer | Sweden |
| 22 | Hulda Leaf | 53 | Wife | — | Sweden |
| 23 | Arthur Leaf | 23 | Son | Shipping Clerk | Illinois |
| 24 | Lily Leaf | 18 | Daughter | Waitress | Illinois |
| 25 | Valentine Augustine | 32 | Head | Copy Writer | Wisconsin |
| 26 | Marcella Augustine | 30 | Wife | — | Illinois |
| 27 | Janet Augustine | 4 | Daughter | — | Illinois |
| 28 | Charles Augustine | 1 | Son | — | Illinois |
| 29 | Roy Maxwell | 51 | Head | Locomotive Engineer | Iowa |
| 30 | Mary Maxwell | 46 | Wife | — | Iowa |
| 31 | Mary E. Maxwell | 16 | Daughter | — | Iowa |
| 32 | David Maxwell | 12 | Son | — | Iowa |
| 33 | James Maxwell | 11 | Son | — | Iowa |
| 34 | Magnus Zimmerman | 69 | Head | — | Germany |
| 35 | Mary Zimmerman THIS PERSON | 73 | Wife | — | Ireland |
| 36 | Richard Zimmerman | 49 | Son | Chief Clerk | Wisconsin |
| 37 | Catherine Zimmerman | 47 | Daughter-in-law | — | Illinois |
| 38 | Mary Zimmerman | 48 | Daughter | — | Michigan |
| 39 | Clarence Barry | 53 | Head | Superintendent | New York |
| 40 | Hazel Barry | 43 | 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)