KJ
Katherine Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cobb-County, Georgia
Our Model Tree links this Katherine Johnson across the 1920, 1930 and 1940 US Censuses in Cobb-County, Georgia (XGBoost, ~Confirmed), with identified parents Charles & Wheeler — first a daughter (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Female
Daughter
Born: Georgia
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cobb-County, Georgia |
| Surname | Johnson |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Georgia |
| 1935 Residence (City) | Marietta City |
| 1935 Residence (County) | Cobb |
| Additional Details | |
| Occupation | Auditing Dept |
| Industry | Southern Bell T. & T. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1020 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
| Occupation | Auditing Dept |
| Township / Ward | Marietta 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Katherine | Age | Birth yr |
|---|---|---|---|---|
| Myrtle Johnson | Spouse | — | 47 | ~1893 |
| Wheeler Johnson | Head | — | 52 | ~1888 |
| Katherine Johnson | Daughter | — | 22 | ~1918 |
Census Appearances
1920
Cobb, Georgia
Daughter, age 2
Cobb, Georgia · implied b. ~1918 — 6 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 | Georgia |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Georgia |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
1930
Cobb, Georgia
Daughter, age 12
Cobb, Georgia · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Georgia |
| Father's Birthplace | Georgia |
| Mother's Birthplace | Georgia |
| Can Read/Write | Yes |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
1940
Cobb-County, Georgia
Daughter, age 22
Cobb-County, Georgia · implied b. ~1918 — 3 household members
| Surname | Johnson |
| Given Name | Katherine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Georgia |
| 1935 Residence (City) | Marietta City |
| 1935 Residence (County) | Cobb |
| Occupation | Auditing Dept |
| Industry | Southern Bell T. & T. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1020 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Georgia |
| Birth Country | United States |
| Birthplace (normalized) | georgia |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Johnson (~0.92 confidence) and father Wheeler Johnson (~0.92 confidence) and father Charles Johnson (~0.92 confidence) and mother Myrtle Johnson (~0.92 confidence) and mother Myrtle Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Johnson
b. ~1887
Source father
● Household
· direct · ~0.92
Father
Wheeler Johnson
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Charles Johnson
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Myrtle Johnson
b. ~1893
Source mother
● Household
· direct · ~0.92
Mother
Myrtle Johnson
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Katherine Johnson
Daughter · 1940 · age 22 · b. ~1918 · Georgia
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cobb-County, Georgia
Open full size
1940 US Federal Census — Cobb-County, Georgia
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00658-00244)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annie L. Bishop | 60 | Wife | — | Georgia |
| 42 | Nancy Wilson | 70 | Head | — | Georgia |
| 43 | Louise Wilson | 33 | Daughter | Binder | Georgia |
| 44 | Conrad Baughman | 36 | Head | Meat-Cutter | Georgia |
| 45 | Meeta P. Baughman | 35 | Wife | — | Georgia |
| 46 | Connie L. Baughman | 6 | Daughter | — | Georgia |
| 47 | Charles L. Baughman | 2 | Son | — | Georgia |
| 48 | Homer P. Howell | 38 | Head | Agent | Georgia |
| 49 | Ann M. Howell | 36 | Wife | — | Georgia |
| 50 | Homer P. Jr. Howell | 12 | Son | — | Georgia |
| 51 | Carolyn L. Howell | 3 | Daughter | — | Georgia |
| 52 | H. Marcellus Gilbert | 56 | Head | Minister | Georgia |
| 53 | Elizabeth O. Gilbert | 48 | Wife | Art Director | Georgia |
| 54 | Garrett L. White | 33 | Head | Operator Machine | Georgia |
| 55 | Beulah J. White | 32 | Wife | Power Machine | Georgia |
| 56 | Betty Jo White | 12 | Daughter | — | Georgia |
| 57 | Mary Helen White | 10 | Daughter | — | Georgia |
| 58 | Trudie L. Crow | 60 | Head | Dietician | Georgia |
| 59 | Nannie L. Jackson | 54 | Sister | — | Georgia |
| 60 | Morton Barger | 43 | Head | Butcher | Georgia |
| 61 | Miriam Barger | 42 | Wife | Housekeeping Aid | Georgia |
| 62 | Marion Barger | 17 | Daughter | — | Georgia |
| 63 | Algernon H. Pickens | 74 | Son-in-law | — | Georgia |
| 64 | Ruth S. Lowman | 60 | Head | Nurse | Georgia |
| 65 | Joe M. Dobbs | 41 | Boarder | Salesman | Georgia |
| 66 | Annie L. Dobbs | 32 | Daughter | — | Georgia |
| 67 | Wheeler L. Johnson | 52 | Head | Assistant Postmaster | Georgia |
| 68 | Myrtle L. Johnson | 47 | Wife | — | Georgia |
| 69 | Katherine Johnson THIS PERSON | 22 | Daughter | Auditing Dept | Georgia |
| 70 | Hubert L. Hawkins | 38 | Head | Home Service | Georgia |
| 71 | Ruby L. Hawkins | 34 | Wife | — | Georgia |
| 72 | Daisy Lee Hawkins | 15 | Daughter | — | Georgia |
| 73 | Hubert L. Jr. Hawkins | 12 | Son | — | Georgia |
| 74 | James A. Blackburn | 52 | Head | Polisher Of Granite | Georgia |
| 75 | James A. Jr. Blackburn | 21 | Son | Helper Plane | Georgia |
| 76 | Elbert Blackburn | 18 | Son | New Worker | Georgia |
| 77 | Perry Dean Blackburn | 17 | Daughter | — | Georgia |
| 78 | Lucie Maud Blackburn | 15 | Daughter | — | Georgia |
| 79 | Carl B. Hines | 41 | Head | Soda Clerk | Georgia |
| 80 | Caroline L. Hines | 36 | Wife | — | Georgia |
Pedigree Summary
Katherine
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)