TJ
Thelma Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jones-County, Iowa
Our Model Tree links this Thelma Johnson across the 1920, 1930 and 1940 US Censuses in Jones-County, Iowa (XGBoost, ~Confirmed), with identified parents Arthur & Otha — first a daughter (b.~1902), then head of a 2-person household.
Age 38
b. ~1902
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jones-County, Iowa |
| Surname | Johnson |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Onslow town |
| 1935 Residence (County) | Jones |
| Additional Details | |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Operator |
| Township / Ward | Onslow Town |
| Est. Birth Year | ~1902 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Thelma | Age | Birth yr |
|---|---|---|---|---|
| Thelma Johnson | Daughter | — | 38 | ~1902 |
| Arthur Johnson | Head | — | 63 | ~1877 |
Census Appearances
1920
Wyoming, Iowa
Daughter, age 18
Wyoming, Iowa · implied b. ~1902 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Jones, Iowa
Daughter, age 27
Jones, Iowa · implied b. ~1903 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| Age at First Marriage | 27 |
| Father's Birthplace | Wisconsin |
| Mother's Birthplace | Iowa |
| Occupation | Dressmaker |
| Industry | at Home |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Jones-County, Iowa
Daughter, age 38
Jones-County, Iowa · implied b. ~1902 — 2 household members
| Surname | Johnson |
| Given Name | Thelma |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Onslow town |
| 1935 Residence (County) | Jones |
| Occupation | Operator |
| Industry | Telephone |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 600 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Thelma Johnson across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Arthur Johnson (~0.92 confidence) and father Otha Johnson (~0.92 confidence) and mother Otha Johnson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Arthur Johnson
b. ~1877
Source father
● Household
· direct · ~0.92
Father
Otha Johnson
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Otha Johnson
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thelma Johnson
Daughter · 1940 · age 38 · b. ~1902 · Iowa
★ 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 — Jones-County, Iowa
Open full size
1940 US Federal Census — Jones-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01172-00312)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John F. Gould | 18 | Son | Attendant | Iowa |
| 42 | Norma Gould | 15 | Daughter | — | Iowa |
| 43 | Wanda M. Gould | 13 | Daughter | — | Iowa |
| 44 | Gust Schadelzky | 48 | Brother | Owner | Iowa |
| 45 | Arthur Johnson | 63 | Head | — | Iowa |
| 46 | Thelma Johnson THIS PERSON | 38 | Daughter | Operator | Illinois |
| 47 | Ivan D. Mccarty | 45 | Head | Laborer | Iowa |
| 48 | Nellie L. Mccarty | 50 | Wife | — | Missouri |
| 49 | Ralph Mccarty | 12 | Son | — | Iowa |
| 50 | John H. Paulsen | 41 | Head | Operator | Iowa |
| 51 | Norma Paulsen | 26 | Wife | — | Iowa |
| 52 | Harrison Ger | 73 | Lodger | — | Iowa |
| 53 | Frank Johnson | 79 | Head | — | Iowa |
| 54 | Mary Johnson | 74 | Wife | — | Iowa |
| 55 | Grace Williams | 49 | Daughter | — | Iowa |
| 56 | Russell E. Chaplin | 38 | Head | — | Iowa |
| 57 | Harriet B. Chaplin | 32 | Wife | — | Iowa |
| 58 | Kay C. Chaplin | 15 | Daughter | — | Iowa |
| 59 | James R. Chaplin | 3 | Son | — | Iowa |
| 60 | Floyd G. Chatterton | 48 | Head | Farmer | Iowa |
| 61 | Eva Chatterton | 49 | Wife | — | Iowa |
| 62 | Herman C. Gutknecht | 52 | Head | Farmer | Germany |
| 63 | Louise M. Gutknecht | 46 | Wife | — | Germany |
| 64 | Hertha Gutknecht | 16 | Daughter | — | Germany |
| 65 | Thomas C. Gutknecht | 8 | Son | — | Iowa |
| 66 | William Portenier | 40 | Head | Farmer | Illinois |
| 67 | Effie M. Portenier | 39 | Wife | — | Illinois |
| 68 | Paul Portenier | 16 | Son | — | Illinois |
| 69 | Phyllis Portenier | 10 | Daughter | — | Iowa |
| 70 | Newel True | 38 | Head | Grocery | Iowa |
| 71 | Agnes True | 40 | Wife | — | Iowa |
| 72 | Marilyn True | 8 | Daughter | — | Iowa |
| 73 | Carolyn True | 5 | Daughter | — | Iowa |
| 74 | Ed J. Kelineck | 47 | Head | Tavern | Iowa |
| 75 | Julia Kelineck | 43 | Wife | — | Iowa |
| 76 | Ed J. Ardorval | 41 | Head | Druggist | Iowa |
| 77 | Wilma Ardorval | 35 | Wife | Druggist | Iowa |
| 78 | Ronald Ardorval | 7 | Son | — | Iowa |
| 79 | Harold Jordan | 48 | Head | Grocery | Iowa |
| 80 | Jenny Jordan | 47 | Wife | — | Iowa |
Pedigree Summary
Thelma
Gen 1 · 3 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)