KJ
Katherine Johnson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Bryan-County, Oklahoma
Our Model Tree links this Katherine Johnson across the 1930 and 1940 US Censuses in Bryan-County, Oklahoma (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 11-person household.
Age 12
b. ~1928
Female
Daughter
Born: Oklahoma
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Bryan-County, Oklahoma |
| Surname | Johnson |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Oklahoma |
| 1935 Residence (City) | Speairs Township |
| 1935 Residence (County) | Bryan |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
| Township / Ward | Speairs Township |
| Est. Birth Year | ~1928 |
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 |
|---|---|---|---|---|
| Leonard Johnson | Son | — | 14 | ~1926 |
| Jean Johnson | Son | — | 3 | ~1937 |
| Doris Johnson | Daughter | — | 10 | ~1930 |
| Harold Johnson | Son | — | 5 | ~1935 |
| Doris Johnson | Daughter | — | 8 | ~1932 |
| Cornelia Peirce | Other | — | 70 | ~1870 |
| Verda Johnson | Spouse | — | 35 | ~1905 |
| Laverne Johnson | Daughter | — | 16 | ~1924 |
| Robert Johnson | Head | — | 39 | ~1901 |
| Katherine Johnson | Daughter | — | 12 | ~1928 |
| J Nale | Other | — | 15 | ~1925 |
Census Appearances
1930
Bryan, Oklahoma
Daughter, age 2
Bryan, Oklahoma · implied b. ~1928 — 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 | 2 |
| Marital Status | Single |
| Birthplace | Oklahoma |
| Father's Birthplace | Oklahoma |
| Mother's Birthplace | Texas |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
1940
Bryan-County, Oklahoma
Daughter, age 12
Bryan-County, Oklahoma · implied b. ~1928 — 11 household members
| Surname | Johnson |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Oklahoma |
| 1935 Residence (City) | Speairs Township |
| 1935 Residence (County) | Bryan |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Oklahoma |
| Birth Country | United States |
| Birthplace (normalized) | oklahoma |
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 12 · b. ~1928 · Oklahoma
★ You are viewing this record
Sibling
Harold Johnson
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Johnson
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Doris Johnson
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Laverne Johnson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Leonard Johnson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Johnson
Sibling · 1940 · age 3
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 — Bryan-County, Oklahoma
Open full size
1940 US Federal Census — Bryan-County, Oklahoma
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03278-01038)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Emlye Lewis | 48 | Wife | — | Kentucky |
| 42 | J. B. Lewis | 22 | Son | — | Texas |
| 43 | Baulton Lewis | 15 | Son | — | Texas |
| 44 | J. E. Carpenter | 52 | Head | Farmer | Arkansas |
| 45 | Lillie Carpenter | 53 | Wife | — | Texas |
| 46 | Millie Frost | 74 | Mother | — | Texas |
| 47 | Robert Johnson | 39 | Head | Farm Labor | Oklahoma |
| 48 | Verda Johnson | 35 | Wife | — | Texas |
| 49 | Laverne Johnson | 16 | Daughter | — | Oklahoma |
| 50 | Leonard Johnson | 14 | Son | — | Oklahoma |
| 51 | Katherine Johnson THIS PERSON | 12 | Daughter | — | Oklahoma |
| 52 | Doris Johnson | 10 | Daughter | — | Oklahoma |
| 53 | Doris Johnson | 8 | Daughter | — | Oklahoma |
| 54 | Harold Johnson | 5 | Son | — | Oklahoma |
| 55 | Jean Johnson | 3 | Son | — | Oklahoma |
| 56 | Cornelia Peirce | 70 | Mother | — | Alabama |
| 57 | J. D. Nale | 15 | Orphan | — | Oklahoma |
| 58 | Earl Clower | 39 | Head | Farm Labor | Missouri |
| 59 | Geraldine Clower | 12 | Daughter | — | Oklahoma |
| 60 | Bobby Clower | 10 | Son | — | Oklahoma |
| 61 | Billie C. Clower | 5 | Son | — | Oklahoma |
| 62 | Mary Sue Clower | 2 | Daughter | — | Oklahoma |
| 63 | Lee H. Lane | 67 | Head | Farmer | Arkansas |
| 64 | Minnie Lane | 63 | Wife | — | Texas |
| 65 | Robert Castolo | 44 | Lodger | — | Oklahoma |
| 66 | J. L. Savage | 64 | Head | Farmer | Tennessee |
| 67 | Ora Savage | 60 | Wife | — | Missouri |
| 68 | Jessie Savage | 36 | Son | Farm Labor | Oklahoma |
| 69 | Fay Savage | 29 | Daughter in law | — | Texas |
| 70 | William Savage | 10 | Grand-son | — | Oklahoma |
| 71 | Haswell Savage | 4 | Grand-son | — | Oklahoma |
| 72 | Jessie Napolier | 64 | Head | Operator | Texas |
| 73 | J. A. Davidson | 48 | Head | Farmer | Arkansas |
| 74 | Verna Davidson | 48 | Wife | — | Texas |
| 75 | Kenneth Davidson | 20 | Head | Farmer | Texas |
| 76 | Fay Davidson | 21 | Wife | — | Texas |
| 77 | J. W. Wagoner | 49 | Head | Farm Labor | Texas |
| 78 | Blanche Wagoner | 47 | Wife | — | Okla |
| 79 | Zella Mae Wagoner | 20 | Daughter | — | Okla |
| 80 | P. C. Wagoner | 14 | Son | — | Okla |
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)