MS
Mary Spencer — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jackson-County, Illinois
Our Model Tree links this Mary Spencer across the 1920, 1930 and 1940 US Censuses in Jackson-County, Illinois (XGBoost, ~Confirmed), with identified parents Dickson & Rachel — first a daughter (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jackson-County, Illinois |
| Surname | Spencer |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Vergennes Twp |
| 1935 Residence (County) | Jackson |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | No |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Vergennes Twp |
| Est. Birth Year | ~1918 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Spencer | Daughter | — | 22 | ~1918 |
| Allegra Spencer | Daughter | — | 11 | ~1929 |
| Ida Spencer | Daughter | — | 18 | ~1922 |
| Wallace Spencer | Head | — | 47 | ~1893 |
Census Appearances
1920
Jackson, Illinois
Daughter, age 2
Jackson, Illinois · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Spencer |
| Given Name | Mary J. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| 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 |
1930
Jackson, Illinois
Daughter, age 12
Jackson, Illinois · implied b. ~1918 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Spencer |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Jackson-County, Illinois
Daughter, age 22
Jackson-County, Illinois · implied b. ~1918 — 4 household members
| Surname | Spencer |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Vergennes Twp |
| 1935 Residence (County) | Jackson |
| Class of Worker | 0 |
| Highest Grade | No |
| 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 Spencer across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Dickson Spencer (~0.82 confidence) and mother Rachel Spencer (~0.92 confidence) and father Wallace Spencer (~0.92 confidence). The pedigree spans 2 generations with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.89
Father
Dickson Spencer
b. ~1857
Source father>father
● Household
· direct · ~0.82
Mother
Rachel Spencer
b. ~1890
Source mother
● Household
· direct · ~0.92
Father
Wallace Spencer
b. ~1892
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Spencer
Daughter · 1940 · age 22 · b. ~1918 · Illinois
★ You are viewing this record
Sibling
Allegra Spencer
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ida Spencer
Sibling · 1940 · age 18
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 — Jackson-County, Illinois
Open full size
1940 US Federal Census — Jackson-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00814-01094)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ronald Pittman | 2 | Son | — | Illinois |
| 2 | Jerry Ray Pittman | 1 | Son | — | Illinois |
| 3 | Earl H. Kimmel | 46 | Head | Cook | Illinois |
| 4 | Arrah Jean Kimmel | 12 | Daughter | — | Illinois |
| 5 | Earnestine Kimmel | 11 | Daughter | — | Illinois |
| 6 | Jack Kimmel | 35 | Brother | Delivery | Illinois |
| 7 | Harley Higgerson | 31 | Head | State Packer | Illinois |
| 8 | Hilda Higgerson | 23 | Wife | — | Illinois |
| 9 | Clifford Higgerson | 5 | Son | — | Illinois |
| 10 | Milton Boudin | 38 | Head | Farmer | Illinois |
| 11 | Irene Boudin | 26 | Wife | — | Illinois |
| 12 | Virginia Boudin | 5 | Daughter | — | Illinois |
| 13 | Joan Boudin | 2 | Daughter | — | Illinois |
| 14 | Janet Boudin | 2 | Daughter | — | Illinois |
| 15 | Charles Boudin | 63 | Father | Fireman | Illinois |
| 16 | Willie Rosenberger | 48 | Head | Laborer | Illinois |
| 17 | Cleo Rosenberger | 20 | Daughter | — | Illinois |
| 18 | Hilda Rosenberger | 18 | Daughter | — | Illinois |
| 19 | Leo Rosenberger | 15 | Son | — | Illinois |
| 20 | April Rosenberger | 12 | Daughter | — | Illinois |
| 21 | Sarah Ann Rosenberger | 7 | Daughter | — | Illinois |
| 22 | Steve Makin | 25 | Head | Farmer | Illinois |
| 23 | Sophie Makin | 22 | Wife | — | Illinois |
| 24 | Richard Lattay | 76 | Head | — | Illinois |
| 25 | Charlotte Lattay | 76 | Wife | — | Illinois |
| 26 | Francis Maud Lattay | 53 | Daughter | — | Illinois |
| 27 | Clyde Lattay | 29 | Grandson | — | Illinois |
| 28 | Lune Lattay | 27 | Grandson | Farmer | Illinois |
| 29 | Joseph M. Shaefer | 42 | Head | Digger | Illinois |
| 30 | Ruth Shaefer | 37 | Wife | — | Illinois |
| 31 | Roy Shaefer | 16 | Son | Farm Hand | Illinois |
| 32 | Kenneth Shaefer | 14 | Son | — | Illinois |
| 33 | Homer Shaefer | 11 | Son | — | Illinois |
| 34 | Mary Lou Shaefer | 8 | Daughter | — | Illinois |
| 35 | Joan Shaefer | 5 | Daughter | — | Illinois |
| 36 | Billy Gene Shaefer | 1 | Son | — | Illinois |
| 37 | Wallace Spencer | 47 | Head | Top Hand | Illinois |
| 38 | Mary Spencer THIS PERSON | 22 | Daughter | — | Illinois |
| 39 | Ida Spencer | 18 | Daughter | — | Illinois |
| 40 | Allegra Spencer | 11 | Daughter | — | Illinois |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 2 parents
~0.92
Gen 2 · 1 grandparents
~0.82
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)