KJ
Katherine Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Seward-County, Kansas
Our Model Tree links this Katherine Johnson across the 1930 and 1940 US Censuses in Seward-County, Kansas (XGBoost, ~Confirmed) — first a daughter (b.~1926), then head of a 11-person household.
Age 14
b. ~1926
Female
Daughter
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Seward-County, Kansas |
| Surname | Johnson |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Liberal City |
| 1935 Residence (County) | Seward |
| Additional Details | |
| Highest Grade | H 1 |
| 1935 Residence | Same House |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Liberal City |
| Est. Birth Year | ~1926 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Katherine | Age | Birth yr |
|---|---|---|---|---|
| Carolyn Johnson | Daughter | — | 3 | ~1937 |
| Edna Johnson | Spouse | — | 41 | ~1899 |
| Kendall Johnson | Son | — | 8 | ~1932 |
| Wendell Johnson | Son | — | 7 | ~1933 |
| Joe Johnson | Head | — | 45 | ~1895 |
| Raymond Johnson | Son | — | 10 | ~1930 |
| Katherine Johnson | Daughter | — | 14 | ~1926 |
| Ida Johnson | Daughter | — | 1 | ~1939 |
| Floyd Johnson | Son | — | 20 | ~1920 |
| Russell Johnson | Son | — | 18 | ~1922 |
| Howard Johnson | Son | — | 22 | ~1918 |
Census Appearances
1930
Seward, Kansas
Daughter, age 4
Seward, Kansas · implied b. ~1926 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Seward-County, Kansas
Daughter, age 14
Seward-County, Kansas · implied b. ~1926 — 11 household members
| Surname | Johnson |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Liberal City |
| 1935 Residence (County) | Seward |
| Highest Grade | H 1 |
| 1935 Residence | Same House |
| 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 Katherine Johnson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Katherine Johnson
Daughter · 1940 · age 14 · b. ~1926 · Kansas
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Sibling
Howard Johnson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carolyn Johnson
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Russell Johnson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Raymond Johnson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kendall Johnson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ida Johnson
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Floyd Johnson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wendell Johnson
Sibling · 1940 · age 7
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 — Seward-County, Kansas
Open full size
1940 US Federal Census — Seward-County, Kansas
Page Contents
25 people indexed on this census page (nara:1940:m-t0627-01258-01050)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | C. G. Vaughn | 53 | Head | Laborer | Tenn. |
| 2 | Anna Vaughn | 50 | Wife | — | Mo. |
| 3 | Joe Vaughn | 10 | Son | — | Kansas |
| 4 | Gene Thompson | 23 | Head | Laborer | Kansas |
| 5 | Dadine Thompson | 22 | Wife | — | Tenn. |
| 6 | Larry Gene Thompson | 1 | Son | — | Kansas |
| 7 | Ray Conaway | 31 | Head | Agent | Kansas |
| 8 | Katherine Conaway | 30 | Wife | — | Kansas |
| 9 | James F. Conaway | 4 | Son | — | Kansas |
| 10 | Ray Eldon Conaway | 3 | Son | — | Kansas |
| 11 | Joe Johnson | 45 | Head | Mechanic | Mo. |
| 12 | Edna Johnson | 41 | Wife | — | Mo. |
| 13 | Howard Johnson | 22 | Son | Mechanic | Oklahoma |
| 14 | Floyd Johnson | 20 | Son | — | Oklahoma |
| 15 | Russell Johnson | 18 | Son | — | Kansas |
| 16 | Katherine Johnson THIS PERSON | 14 | Daughter | — | Kansas |
| 17 | Raymond Johnson | 10 | Son | — | Kansas |
| 18 | Kendall Johnson | 8 | Son | — | Oklahoma |
| 19 | Wendell Johnson | 7 | Son | — | Oklahoma |
| 20 | Carolyn Johnson | 3 | Daughter | — | Kansas |
| 21 | Ida Jane Johnson | 1 | Daughter | — | Kansas |
| 22 | Robert Smisby | 60 | Head | Painter | Texas |
| 23 | Daisy Smisby | 34 | Wife | — | Mo. |
| 24 | Bobby Gene Smisby | 5 | Son | — | Kansas |
| 25 | Marjorie Ruth Smisby | 0 | Daughter | — | Kansas |
Related Census Records
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)