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Mary Lucas — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Madison-County, Illinois
Our Model Tree links this Mary Lucas across the 1930 and 1940 US Censuses in Madison-County, Illinois (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 10-person household.
Age 41
b. ~1899
Female
Spouse
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Illinois |
| Surname | Lucas |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Fort Russell Township |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Township / Ward | Fort Russell Township |
| Est. Birth Year | ~1899 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Alvenia Lucas | Daughter | — | 10 | ~1930 |
| Lois Lucas | Daughter | — | 16 | ~1924 |
| Violet Lucas | Daughter | — | 7 | ~1933 |
| Shirley Lucas | Daughter | — | 4 | ~1936 |
| Lola Lucas | Daughter | — | 18 | ~1922 |
| Vern Lucas | Head | — | 42 | ~1898 |
| John Lucas | Son | — | 14 | ~1926 |
| Robert Lucas | Son | — | 9 | ~1931 |
| James Lucas | Son | — | 12 | ~1928 |
| Mary Lucas | Spouse | — | 41 | ~1899 |
Census Appearances
1930
Madison, Illinois
Other, age 31
Madison, Illinois · implied b. ~1899 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lucas |
| Given Name | Mary E. |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Age at First Marriage | 21 |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Madison-County, Illinois
Spouse, age 41
Madison-County, Illinois · implied b. ~1899 — 10 household members
| Surname | Lucas |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Fort Russell Township |
| 1935 Residence (County) | Madison |
| Highest Grade | H 8 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 Lucas across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Lucas
Spouse · 1940 · age 41 · b. ~1899 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Madison-County, Illinois
Open full size
1940 US Federal Census — Madison-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00849-00713)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clarence Heeren | 45 | Head | Farmer | Illinois |
| 2 | Alma Heeren | 44 | Wife | — | Illinois |
| 3 | Harold Heeren | 22 | Son | Farm Hand | Illinois |
| 4 | Virgil Heeren | 17 | Son | Farm Hand | Illinois |
| 5 | Gloria Heeren | 7 | Daughter | — | Illinois |
| 6 | Leonard Marshall | 31 | Head | Maintenance Dept | Maryland |
| 7 | Edith Marshall | 31 | Wife | — | Illinois |
| 8 | Robert Marshall | 2 | Son | — | Illinois |
| 9 | Shirley Ann Marshall | 5 | Daughter | — | Illinois |
| 10 | Jean Marshall | 4 | Daughter | — | Illinois |
| 11 | Jane Marshall | 4 | Daughter | — | Illinois |
| 12 | Carlene Ketchum | 5 | Step-daughter | — | Illinois |
| 13 | Henry B. Heeren | 54 | Head | Farmer | Illinois |
| 14 | Rebecca Heeren | 49 | Wife | — | Illinois |
| 15 | Elmer Heeren | 25 | Son | Clerk | Illinois |
| 16 | Le Roy Heeren | 17 | Son | — | Illinois |
| 17 | William E. Draper | 64 | Head | Carpenter | Illinois |
| 18 | Alice R Draper | 45 | Wife | Cook | Missouri |
| 19 | Vern Lucas | 42 | Head | Car Bracer | Illinois |
| 20 | Mary Lucas THIS PERSON | 41 | Wife | — | Tennessee |
| 21 | Lola Lucas | 18 | Daughter | — | Illinois |
| 22 | Lois Lucas | 16 | Daughter | — | Illinois |
| 23 | John Lucas | 14 | Son | — | Illinois |
| 24 | James Lucas | 12 | Son | — | Illinois |
| 25 | Alvenia Lucas | 10 | Daughter | — | Illinois |
| 26 | Robert Lucas | 9 | Son | — | Illinois |
| 27 | Violet Lucas | 7 | Daughter | — | Illinois |
| 28 | Shirley Lucas | 4 | Daughter | — | Illinois |
| 29 | Wm J Brooks | 36 | Head | Mixing Room | Arkansas |
| 30 | Hazel Brooks | 33 | Wife | — | Illinois |
| 31 | Theodore Brooks | 12 | Son | — | Illinois |
| 32 | Juanita Brooks | 9 | Daughter | — | Illinois |
| 33 | Obed Brooks | 28 | Brother | Laborer | Illinois |
| 34 | Pat Baker | 40 | Head | Molder | Illinois |
| 35 | Myrtle Baker | 40 | Wife | — | Illinois |
| 36 | Jerry Davis | 41 | Head | Laborer | Illinois |
| 37 | Cora Davis | 37 | Wife | — | Missouri |
| 38 | Kenneth Davis | 19 | Son | New Worker | Illinois |
| 39 | Wanda Davis | 14 | Daughter | — | Illinois |
| 40 | Shirley Davis | 10 | Daughter | — | Michigan |
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)