MF
Margaret Foster — 1940 US Census Record
Model Tree available1940 United States Federal Census · Will-County, Illinois
Our Model Tree links this Margaret Foster across the 1920, 1930 and 1940 US Censuses in Will-County, Illinois (XGBoost, ~Confirmed), with identified parents Robert & Margaret — first a daughter (b.~1910), then head of a 5-person household.
Age 30
b. ~1910
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Will-County, Illinois |
| Surname | Foster |
| Given Name | Margaret M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet City |
| 1935 Residence (County) | Will |
| Additional Details | |
| Occupation | Clerk |
| Industry | Coal Company |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 900 |
| Highest Grade | H 3 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Clerk |
| Township / Ward | Joliet City |
| Est. Birth Year | ~1910 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Foster | Daughter | — | 30 | ~1910 |
| Robert Foster | Son | — | 26 | ~1914 |
| Ann Foster | Spouse | — | 49 | ~1891 |
| Joseph Foster | Son | — | 28 | ~1912 |
| Robert Foster | Head | — | 50 | ~1890 |
Census Appearances
1920
Will, Illinois
Daughter, age 10
Will, Illinois · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | Margaret M |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Will, Illinois
Daughter, age 20
Will, Illinois · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foster |
| Given Name | Margaret M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | Stenographer |
| Industry | Electric Office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Will-County, Illinois
Daughter, age 30
Will-County, Illinois · implied b. ~1910 — 5 household members
| Surname | Foster |
| Given Name | Margaret M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Joliet City |
| 1935 Residence (County) | Will |
| Occupation | Clerk |
| Industry | Coal Company |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 900 |
| Highest Grade | H 3 |
| 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 Margaret Foster across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Foster (~0.92 confidence) and mother Margaret Foster (~0.92 confidence) and father Robert Foster (~0.92 confidence) and mother Ann Foster (~0.92 confidence) and father Robert Foster (~0.92 confidence) and mother Anna Foster (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Foster
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Margaret Foster
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
Robert Foster
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Ann Foster
b. ~1891
Source mother
● Household
· direct · ~0.92
Father
Robert Foster
b. ~1891
Source father
● Household
· direct · ~0.92
Mother
Anna Foster
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Foster
Daughter · 1940 · age 30 · b. ~1910 · Illinois
★ You are viewing this record
Sibling
Joseph Foster
Sibling · 1940 · age 28
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Foster
Sibling · 1940 · age 26
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 — Will-County, Illinois
Open full size
1940 US Federal Census — Will-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00908-00084)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert H. Morthland | 14 | Head | Legal Advisor | Illinois |
| 2 | John V. Kubontz | 37 | Head | Conductor | Illinois |
| 3 | Angela P. Kubontz | 34 | Wife | — | Illinois |
| 4 | John R. Kubontz | 9 | Son | — | Illinois |
| 5 | Carol A. Kubontz | 5 | Daughter | — | Illinois |
| 6 | Mary J. Kubontz | 1 | Daughter | — | Illinois |
| 7 | Henry C. Stewart | 44 | Head | Salesman | Illinois |
| 8 | Vera N. Stewart | 42 | Wife | Clerk | Illinois |
| 9 | Robert J. Foster | 50 | Head | Clerk | Illinois |
| 10 | Ann B. Foster | 49 | Wife | — | Indiana |
| 11 | Margaret M. Foster THIS PERSON | 30 | Daughter | Clerk | Illinois |
| 12 | Joseph D. Foster | 28 | Son | Clerk | Illinois |
| 13 | Robert J. Jr. Foster | 26 | Son | Salesman | Illinois |
| 14 | Sidney Maddie | 26 | Head | Agent | Illinois |
| 15 | Eva Maddie | 25 | Wife | — | Poland |
| 16 | Francis R. Prock | 32 | Head | — | Illinois |
| 17 | Mary Prock | 33 | Wife | Teacher | Illinois |
| 18 | Anne Prock | 5 | Daughter | — | Illinois |
| 19 | Francis R. Prock | 2 | Son | — | Illinois |
| 20 | Jenny Bucklan | 63 | Mother-in-law | Sales Lady | Illinois |
| 21 | Frank L. Barnes | 46 | Head | Carpenter | Illinois |
| 22 | Edith Barnes | 42 | Wife | — | Illinois |
| 23 | Evelyn M. Barnes | 16 | Daughter | New Worker | Illinois |
| 24 | Helen L. Barnes | 13 | Daughter | — | Illinois |
| 25 | Raymond F. Barnes | 10 | Son | — | Illinois |
| 26 | Donald D. Barnes | 2 | Son | — | Illinois |
| 27 | Richard J. Barnes | 2 | Son | — | Illinois |
| 28 | Frank P. Mcnamee | 34 | Head | Paymaster | Illinois |
| 29 | Verna A. Mcnamee | 36 | Wife | — | Illinois |
| 30 | Norma Rc. Mcnamee | 1 | Daughter | — | Illinois |
| 31 | Harry W. Hayes | 40 | Head | Printer | Illinois |
| 32 | Annie M. Hayes | 40 | Wife | — | Illinois |
| 33 | William T. Frazier | 37 | Head | Sales Manager | Virginia |
| 34 | Lettie S. Frazier | 39 | Wife | — | Tennessee |
| 35 | Ruth A. Frazier | 5 | Daughter | — | Illinois |
| 36 | Edward T. Mahr | 41 | Head | Manager | Illinois |
| 37 | Grace F. Mahr | 37 | Wife | — | Illinois |
| 38 | Margaret A. Mahr | 10 | Daughter | — | Illinois |
| 39 | Milton Hall | 24 | Head | Truck Driver | Illinois |
| 40 | Florence Hall | 25 | Wife | Beauty Inst. | Illinois |
Pedigree Summary
Margaret + 2 siblings
Gen 1 · 6 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)