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Mary Bullock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Illinois
Our Model Tree links this Mary Bullock across the 1930 and 1940 US Censuses in Jefferson-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Illinois |
| Surname | Bullock |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Mt. Vernon |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | 4 |
| 1935 Residence | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Shiloh Twp |
| Est. Birth Year | ~1928 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| David Bullock | Son | — | 15 | ~1925 |
| Mary Bullock | Daughter | — | 12 | ~1928 |
| James Bullock | Son | — | 19 | ~1921 |
| Jerry Bullock | Son | — | 5 | ~1935 |
| Gale Bullock | Son | — | 8 | ~1932 |
| David Bullock | Head | — | 44 | ~1896 |
| Max Bullock | Son | — | 3 | ~1937 |
| Joe Bullock | Son | — | 13 | ~1927 |
| Mary Bullock | Spouse | — | 39 | ~1901 |
Census Appearances
1930
Jefferson, Illinois
Daughter, age 1
Jefferson, Illinois · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bullock |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Jefferson-County, Illinois
Daughter, age 12
Jefferson-County, Illinois · implied b. ~1928 — 9 household members
| Surname | Bullock |
| Given Name | Mary Louise |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Mt. Vernon |
| 1935 Residence (County) | Jefferson |
| Highest Grade | 4 |
| 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 Bullock across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Bullock
Daughter · 1940 · age 12 · b. ~1928 · Illinois
★ You are viewing this record
Sibling
Joe Bullock
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerry Bullock
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Bullock
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Max Bullock
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gale Bullock
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
David Bullock
Sibling · 1940 · age 15
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 — Jefferson-County, Illinois
Open full size
1940 US Federal Census — Jefferson-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00816-00881)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | J. E. Thomas | 68 | Head | — | Illinois |
| 2 | Cassie Thomas | 46 | Wife | — | Illinois |
| 3 | George Fields | 14 | Step-son | — | Illinois |
| 4 | Maxwell Ware | 27 | Head | Laborer | Illinois |
| 5 | Lanya B. Ware | 24 | Wife | — | Indiana |
| 6 | Ronald Lee Ware | 2 | Son | — | Illinois |
| 7 | David Bullock | 44 | Head | Edgetrimmer | Illinois |
| 8 | Mary Alice Bullock | 39 | Wife | — | Illinois |
| 9 | James Russell Bullock | 19 | Son | Joint Beater | Illinois |
| 10 | David Thomas Bullock | 15 | Son | — | Illinois |
| 11 | Joe Frank Bullock | 13 | Son | — | Illinois |
| 12 | Mary Louise Bullock THIS PERSON | 12 | Daughter | — | Illinois |
| 13 | Gale Ralph Bullock | 8 | Son | — | Illinois |
| 14 | Jerry Lee Bullock | 5 | Son | — | Illinois |
| 15 | Max Thorn Bullock | 3 | Son | — | Illinois |
| 16 | H. T. Morton | 63 | Head | — | Illinois |
| 17 | Berthel Morton | 52 | Wife | — | Illinois |
| 18 | Robert Lee | 23 | Step-son | — | Illinois |
| 19 | Charles Lee | 19 | Step-son | — | Illinois |
| 20 | Harry L. Thompson | 70 | Head | Operator | Minnesota |
| 21 | Albert Blyton | 40 | Head | — | Illinois |
| 22 | Eva Blyton | 42 | Wife | — | Illinois |
| 23 | Clifford Blyton | 10 | Son | — | Illinois |
| 24 | Annalee Blyton | 2 | Daughter | — | Illinois |
| 25 | Rosemary Blyton | 0 | Daughter | — | Illinois |
| 26 | James K. Barox | 37 | Head | Farmer | Illinois |
| 27 | Oney Barox | 60 | Wife | — | Illinois |
| 28 | Claude Tolman | 47 | Lodger | Laborer | Indiana |
| 29 | Clyde Williams | 28 | Head | Dock Foreman | Illinois |
| 30 | Marie Williams | 28 | Wife | — | Illinois |
| 31 | Martha Lee Williams | 4 | Daughter | — | Illinois |
| 32 | Shirley Ann Williams | 2 | Daughter | — | Illinois |
| 33 | John Connors | 63 | Head | Supt. Non Certified | Ohio |
| 34 | Lena Connors | 48 | Wife | — | Illinois |
| 35 | John Jr. Connors | 14 | Son | — | Illinois |
| 36 | Stanley Booker | 36 | Hired Man | Laborer | Missouri |
| 37 | Dallas Maya | 26 | Head | Laborer | Illinois |
| 38 | Gladys Maya | 53 | Wife | — | Arkansas |
| 39 | Leroy Maya | 3 | Son | — | Illinois |
| 40 | Anita Jean Maya | 1 | 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)