MF
Mary Foster — 1940 US Census Record
Model Tree available1940 United States Federal Census · Henry-County, Illinois
Our Model Tree links this Mary Foster across the 1910, 1920, 1930 and 1940 US Censuses in Henry-County, Illinois (XGBoost, ~Confirmed), with identified parents Roy & Iola — first a daughter (b.~1902), then head of a 3-person household.
Age 38
b. ~1902
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Henry-County, Illinois |
| Surname | Foster |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Oxford Township |
| 1935 Residence (County) | Henry |
| Additional Details | |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Oxford Township |
| Est. Birth Year | ~1902 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Foster | Daughter | — | 38 | ~1902 |
| Roy Foster | Head | — | 65 | ~1875 |
| Annie Foster | Spouse | — | 62 | ~1878 |
Census Appearances
1910
Henry, Illinois
Daughter, age 9
Henry, Illinois · implied b. ~1901 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 9 |
| 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 |
1920
Henry, Illinois
Daughter, age 18
Henry, Illinois · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Henry, Illinois
Daughter, age 28
Henry, Illinois · implied b. ~1902 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Servant |
| Can Read/Write | No |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Henry-County, Illinois
Daughter, age 38
Henry-County, Illinois · implied b. ~1902 — 3 household members
| Surname | Foster |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Oxford Township |
| 1935 Residence (County) | Henry |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 Foster across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Roy Foster (~0.92 confidence) and mother Iola Foster (~0.92 confidence) and mother Annie Foster (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Roy Foster
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Iola Foster
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Annie Foster
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Foster
Daughter · 1940 · age 38 · b. ~1902 · Illinois
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Henry-County, Illinois
Open full size
1940 US Federal Census — Henry-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00812-00635)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Chester Isaacson | 28 | son | Farmer | Illinois |
| 2 | Carl Isaacson | 16 | son | Farmer | Illinois |
| 3 | W. Clinton Cole | 49 | Head | Farmer | Illinois |
| 4 | Florence Cole | 48 | wife | Farm Laborer | Illinois |
| 5 | Sidney Cole | 20 | son | Farmer | Illinois |
| 6 | Marian Cole | 18 | daughter | — | Illinois |
| 7 | Helen Cole | 12 | daughter | — | Illinois |
| 8 | Martha Mae Cole | 10 | daughter | — | Illinois |
| 9 | Alice Cole | 7 | daughter | — | Illinois |
| 10 | Joe Mumaw | 54 | hired man | Laborer | Indiana |
| 11 | Crystal Williams | 16 | servant | Servant | Illinois |
| 12 | Ellis D. Kirk | 47 | Head | Farmer | Nebraska |
| 13 | Winona Kirk | 46 | wife | — | Illinois |
| 14 | Robert Kirk | 21 | son | Salesman | Illinois |
| 15 | Jack Kirk | 13 | son | — | Illinois |
| 16 | Thomas Blaine | 26 | hired man | Farm Laborer | Kentucky |
| 17 | Otis D. Timberlake | 73 | Head | Farmer | Illinois |
| 18 | Minnie Timberlake | 48 | daughter | — | Illinois |
| 19 | Milton Hoyt | 57 | hired man | Farm Laborer | Illinois |
| 20 | Laurence Dunlavy | 29 | Head | Farmer | Kansas |
| 21 | Myrtle Dunlavy | 67 | mother | — | Ohio |
| 22 | Adolph G. Tornquist | 53 | Head | Farmer | Illinois |
| 23 | Minnie Tornquist | 50 | wife | — | Illinois |
| 24 | Thomas L. Briggs | 60 | Head | Farmer | Illinois |
| 25 | Grace D. Briggs | 56 | wife | — | Illinois |
| 26 | Max Briggs | 21 | son | Laborer | Illinois |
| 27 | Carl D. Peterson | 38 | Head | Assembler | Illinois |
| 28 | Ward Peterson | 16 | son | — | Illinois |
| 29 | Wayne Peterson | 14 | son | — | Illinois |
| 30 | Lyle Peterson | 11 | son | — | Illinois |
| 31 | Robert Peterson | 9 | son | — | Illinois |
| 32 | Daryl Peterson | 3 | son | — | Illinois |
| 33 | T. Edward O'Connor | 36 | Head | Farmer | Illinois |
| 34 | Mae O'Connor | 37 | wife | — | Illinois |
| 35 | Leo O'Connor | 25 | son | Farm Laborer | Illinois |
| 36 | Roy Foster | 65 | Head | Farmer | Illinois |
| 37 | Annie Foster | 62 | wife | Seamstress | Illinois |
| 38 | Mary Foster THIS PERSON | 38 | daughter | — | Illinois |
| 39 | Gerald D. Spivey | 25 | Head | Farmer | Illinois |
| 40 | Clara Spivey | 44 | mother | Farmer | Illinois |
Pedigree Summary
Mary
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)