MT
Mary Tobin — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Mary Tobin across the 1930 and 1940 US Censuses in Cook, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1900), then head of a 10-person household.
Age 30
b. ~1900
Female
Daughter
Born: Illinois
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Tobin |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 24 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | River Forest |
| Est. Birth Year | ~1900 |
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 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Susie Hughes | Other | — | 34 | ~1896 |
| Barbara Kallal | Head | — | 55 | ~1875 |
| Charles Kallal | Son | — | 12 | ~1918 |
| Barbara Murray | Daughter | — | 3 | ~1927 |
| Marian Kallal | Daughter | — | 16 | ~1914 |
| Helen Kallal | Daughter | — | 21 | ~1909 |
| Elizabeth Kallal | Daughter | — | 24 | ~1906 |
| Mary Tobin | Daughter | — | 30 | ~1900 |
| William Murray | Other | — | 1 | ~1929 |
| William Murray | Other | — | 27 | ~1903 |
Census Appearances
1930
Cook, Illinois
Daughter, age 30
Cook, Illinois · implied b. ~1900 — 10 household members
| Surname | Tobin |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 24 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Cook-County, Illinois
Spouse, age 41
Cook-County, Illinois · implied b. ~1899 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tobin |
| Given Name | Marguerite |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Highest Grade | H-2 |
| 1935 Residence | Illinois |
| 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 Tobin across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Tobin
Daughter · 1930 · age 30 · b. ~1900 · Illinois
★ You are viewing this record
Sibling
Charles Kallal
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Kallal
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Kallal
Sibling · 1930 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marian Kallal
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Murray
Sibling · 1930 · age 3
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
1930 US Federal Census — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
27 people indexed on this census page (ia:1930:illinoiscensus00reel508:0214)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Edward Balgemann | 42 | Head | Secretary | Illinois |
| 52 | Minnie Balgemann | 42 | Wife | — | Illinois |
| 53 | Ralph Balgemann | 14 | Son | — | Illinois |
| 54 | William Bierstenfeld | 76 | Father-in-law | Retired | Illinois |
| 55 | Emma Geyer | 22 | Maid | Maid | Illinois |
| 56 | Edmund G. Schultz | 31 | Head | Type Setting | Illinois |
| 57 | Frances Schultz | 31 | Wife | — | Illinois |
| 58 | Elizabeth Schultz | 16 | Daughter | — | Illinois |
| 59 | Marjorie Schultz | 13 | Daughter | — | Illinois |
| 60 | Marie Maahs | 56 | Maid | Servant | Germany |
| 61 | Joseph S. Guy | 59 | Head | Contractor | England |
| 62 | Martha Guy | 53 | Wife | — | Illinois |
| 63 | Gustav M. Wenkler | 54 | Head | Mechanical | Illinois |
| 64 | Minnie Wenkler | 54 | Wife | — | Illinois |
| 65 | Louis Wenkler | 29 | Son | Lawyer | Illinois |
| 66 | William Stan Wenkler | 17 | Son | Student | Illinois |
| 67 | Barbara Kallal | 55 | Head | — | Illinois |
| 68 | Elizabeth Kallal | 24 | Daughter | Teacher | Illinois |
| 69 | Helen T. Kallal | 21 | Daughter | — | Illinois |
| 70 | Marian Kallal | 16 | Daughter | — | Illinois |
| 71 | Charles Kallal | 12 | Son | — | Illinois |
| 72 | Mary C. Tobin THIS PERSON | 30 | Daughter | — | Illinois |
| 73 | William Murray | 27 | Son-in-law | Asst. Paymaster | Iowa |
| 74 | Barbara Murray | 3 | Daughter | — | Illinois |
| 75 | William Murray | 1 | Grandson | — | Illinois |
| 76 | Void | None | — | — | — |
| 77 | Susie Hughes | 34 | Maid | Maid | Tennessee |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)