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Mary Tracy — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Champaign-County, Illinois
Our Model Tree links this Mary Tracy across the 1930 and 1940 US Censuses in Champaign-County, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1924), then head of a 7-person household.
Age 16
b. ~1924
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Champaign-County, Illinois |
| Surname | Tracy |
| Given Name | Mary Ellen |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Scott Township |
| 1935 Residence (County) | Champaign |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Scott Township |
| Est. Birth Year | ~1924 |
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 |
|---|---|---|---|---|
| Bertha Tracy | Spouse | — | 47 | ~1893 |
| Michael Tracy | Son | — | 10 | ~1930 |
| Margaret Tracy | Daughter | — | 12 | ~1928 |
| Mary Tracy | Daughter | — | 16 | ~1924 |
| James Tracy | Son | — | 8 | ~1932 |
| Catherine Tracy | Daughter | — | 14 | ~1926 |
| James Tracy | Head | — | 53 | ~1887 |
Census Appearances
1930
Champaign, Illinois
Daughter, age 6
Champaign, Illinois · implied b. ~1924 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Tracy |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Champaign-County, Illinois
Daughter, age 16
Champaign-County, Illinois · implied b. ~1924 — 7 household members
| Surname | Tracy |
| Given Name | Mary Ellen |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Scott Township |
| 1935 Residence (County) | Champaign |
| Highest Grade | H 4 |
| 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 Tracy across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Tracy
Daughter · 1940 · age 16 · b. ~1924 · Illinois
★ You are viewing this record
Sibling
James Tracy
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Tracy
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Michael Tracy
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Tracy
Sibling · 1940 · age 12
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 — Champaign-County, Illinois
Open full size
1940 US Federal Census — Champaign-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00765-00760)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John S. Lydle | 36 | son | Farmer | Illinois |
| 2 | Margaret M. Bratton | 20 | neice | — | Minnesota |
| 3 | Eugene P. Murphy | 50 | head | Farmer | Ireland |
| 4 | Margaret M. (X) Murphy | 44 | wife | — | Ireland |
| 5 | Geo L. Ferris | 45 | head | Farmer | Illinois |
| 6 | Martha G. Ferris | 44 | wife | — | Illinois |
| 7 | Thomas L. Ferris | 22 | son | Laborer | Illinois |
| 8 | M. Ferris | 18 | son | — | Illinois |
| 9 | Betty L. Ferris | 16 | daughter | — | Illinois |
| 10 | Rita J. Ferris | 15 | daughter | — | Illinois |
| 11 | James A. Ferris | 3 | son | — | Illinois |
| 12 | Dan (X) Collins | 38 | head | Farmer | Ireland |
| 13 | Edward R. (X) Fry | 39 | head | Farmer | Illinois |
| 14 | Alma Fry | 31 | wife | — | Illinois |
| 15 | Edward R. Fry | 9 | son | — | Illinois |
| 16 | Margaret A. Fry | 5 | daughter | — | Illinois |
| 17 | Henry P. (X) Bickel | 51 | head | Farmer | Illinois |
| 18 | Mayme A. Bickel | 53 | wife | — | Illinois |
| 19 | Francis A. Bickel | 23 | son | — | Illinois |
| 20 | Catherine A. Bickel | 20 | daughter | Secretary | Illinois |
| 21 | Carl G. (X) Klein | 58 | head | Farmer | Illinois |
| 22 | Margaret S. Klein | 58 | wife | — | Illinois |
| 23 | Paul Jr. Klein | 22 | son | — | Illinois |
| 24 | Eleanor Mary Klein | 20 | daughter | — | Illinois |
| 25 | William Klein | 53 | brother | Farmer | Illinois |
| 26 | William (X) Hanks | 40 | head | Farmer | Illinois |
| 27 | Grace A. Hanks | 37 | wife | — | Illinois |
| 28 | Lois V. Hanks | 14 | daughter | — | Illinois |
| 29 | William J. Hanks | 3 | son | — | Illinois |
| 30 | John (X) Light | 57 | head | Farmer | Mississippi |
| 31 | Gella May Light | 46 | wife | — | Kentucky |
| 32 | Phyllis J. Light | 14 | son | — | Illinois |
| 33 | Margaret L. Light | 13 | daughter | — | Illinois |
| 34 | James V. (X) Tracy | 53 | head | Farmer | Illinois |
| 35 | Bertha E. Tracy | 47 | wife | — | Illinois |
| 36 | Mary Ellen Tracy THIS PERSON | 16 | daughter | — | Illinois |
| 37 | Catherine C. Tracy | 14 | daughter | — | Illinois |
| 38 | Margaret E. Tracy | 12 | daughter | — | Illinois |
| 39 | Michael A. Tracy | 10 | son | — | Illinois |
| 40 | James F. Tracy | 8 | son | — | Illinois |
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)