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Mary Barker — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Kansas
Our Model Tree links this Mary Barker across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Kansas (XGBoost, ~Confirmed), with identified parents Lewis & Cordelia — first a daughter (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Female
Daughter
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Kansas |
| Surname | Barker |
| Given Name | Mary K. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Valley Falls City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Valley Falls City |
| 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 Barker | Daughter | — | 22 | ~1918 |
| R Barker | Head | — | 52 | ~1888 |
| L Barker | Son | — | 24 | ~1916 |
| Cornelia Barker | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Jefferson, Kansas
Daughter, age 2
Jefferson, Kansas · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Barker |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Jefferson, Kansas
Daughter, age 12
Jefferson, Kansas · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Barker |
| Given Name | Mary Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Jefferson-County, Kansas
Daughter, age 22
Jefferson-County, Kansas · implied b. ~1918 — 4 household members
| Surname | Barker |
| Given Name | Mary K. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Valley Falls City |
| 1935 Residence (County) | Jefferson |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Barker across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Lewis Barker (~0.92 confidence) and mother Cordelia Barker (~0.92 confidence) and father John Barker (~0.92 confidence) and father R Barker (~0.92 confidence) and mother Cornelia Barker (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Lewis Barker
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Cordelia Barker
b. ~1883
Source mother
● Household
· direct · ~0.92
Father
John Barker
b. ~1886
Source father
● Household
· direct · ~0.92
Father
R Barker
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Cornelia Barker
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Barker
Daughter · 1940 · age 22 · b. ~1918 · Kansas
★ You are viewing this record
Sibling
L Barker
Sibling · 1940 · age 24
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 — Jefferson-County, Kansas
Open full size
1940 US Federal Census — Jefferson-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01236-00377)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Charles Olden | 49 | Head | Electrician | Kansas |
| 42 | Grace Olden | 54 | Wife | — | New York |
| 43 | Charles Olden | 24 | Son | — | Kansas |
| 44 | Grace Mary Olden | 18 | Daughter | — | Kansas |
| 45 | Ruth Olden | 17 | Daughter | — | Kansas |
| 46 | Guy Baker | 31 | Head | Agronomist | Kansas |
| 47 | Edna Baker | 30 | Wife | — | Kansas |
| 48 | Albertina Leutert | 79 | Head | — | Switzerland |
| 49 | Emma Leutert | 47 | Daughter | Cashier | Missouri |
| 50 | Walter White | 67 | Head | — | Kansas |
| 51 | Ella White | 64 | Wife | — | Kansas |
| 52 | Louis Lauch | 67 | Head | Proprietor | Pennsylvania |
| 53 | Elizabeth Lauch | 63 | Wife | — | Pennsylvania |
| 54 | Clayton Wyatt | 54 | Head | Postmaster | Kansas |
| 55 | Ethel Wyatt | 51 | Wife | — | Kansas |
| 56 | Idram Mitchell | 70 | Head | Helper | Kansas |
| 57 | Retta Mitchell | 70 | Wife | — | Kansas |
| 58 | Jack La Mass | 11 | Step son | — | Missouri |
| 59 | Arthur Braden | 56 | Head | Dentist | Kansas |
| 60 | Edith Braden | 56 | Wife | — | Kansas |
| 61 | Gertrude Ela | 54 | Head | Teacher | Ohio |
| 62 | Faunt Durst | 66 | Head | Farmer | Tennessee |
| 63 | Elra Durst | 51 | Wife | — | Kansas |
| 64 | Faunt M. Durst | 28 | Son | Clerk | Kansas |
| 65 | Paul Durst | 21 | Son | Auctioneer | Kansas |
| 66 | Robert Durst | 20 | Son | Farmer | Kansas |
| 67 | Jane Straum | 85 | Mother in law | — | Tennessee |
| 68 | Frank Blake | 51 | Head | Attendant | Kansas |
| 69 | Emma Blake | 50 | Wife | — | Kansas |
| 70 | Mary Jane Blake | 16 | Daughter | — | Kansas |
| 71 | R. L. Barker | 52 | Head | Manager | Indiana |
| 72 | Cornelia Barker | 46 | Wife | Bookkeeper | Indiana |
| 73 | L. Loyal Barker | 24 | Son | — | Kansas |
| 74 | Mary K. Barker THIS PERSON | 22 | Daughter | — | Kansas |
| 75 | Oliver Duncan | 73 | Head | Carpenter | Ohio |
| 76 | Ellen Duncan | 69 | Wife | — | Kansas |
| 77 | W. H. Harber | 72 | Head | — | Missouri |
| 78 | Rachel Harber | 54 | Wife | — | Missouri |
| 79 | Arlie Strawn | 55 | Head | Agent | Kansas |
| 80 | Paul Strawn | 19 | Son | — | Kansas |
Pedigree Summary
Mary + 1 sibling
Gen 1 · 5 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)