TJ
Thomas Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Iowa
Our Model Tree links this Thomas Johnson across the 1920, 1930 and 1940 US Censuses in Washington-County, Iowa (XGBoost, ~Confirmed), with identified parents Nina & Charles — first a head (b.~1900), then head of a 4-person household.
Age 40
b. ~1900
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Iowa |
| Surname | Johnson |
| Given Name | Thomas R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Lime Creek Twp |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | farmer |
| Industry | farm |
| Class of Worker | E |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Lime Creek Twp |
| Est. Birth Year | ~1900 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Thomas Johnson | Head | — | 40 | ~1900 |
| Roy Johnson | Son | — | 18 | ~1922 |
| Wayne Johnson | Son | — | 15 | ~1925 |
| Nina Johnson | Spouse | — | 38 | ~1902 |
Census Appearances
1920
Washington, Iowa
Son, age 20
Washington, Iowa · implied b. ~1900 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Thomas R. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Maine |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Washington, Iowa
Other, age 30
Washington, Iowa · implied b. ~1900 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Thomas R. |
| Relationship to Head | 10 |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 20 |
| Father's Birthplace | Maine |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Washington-County, Iowa
Head, age 40
Washington-County, Iowa · implied b. ~1900 — 4 household members
| Surname | Johnson |
| Given Name | Thomas R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Lime Creek Twp |
| 1935 Residence (County) | Washington |
| Occupation | farmer |
| Industry | farm |
| Class of Worker | E |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Thomas Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Nina Graf (~0.50 confidence) and father Charles Johnson (~0.92 confidence) and mother Eliza Johnson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.78
Mother
Nina Graf
b. ~1902
Source mother
● Household
· direct · ~0.5
Father
Charles Johnson
b. ~1858
Source father
● Household
· direct · ~0.92
Mother
Eliza Johnson
b. ~1859
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Thomas Johnson
Head · 1940 · age 40 · b. ~1900 · 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 — Washington-County, Iowa
Open full size
1940 US Federal Census — Washington-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01211-00318)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jessie F. Glider | 47 | Wife | — | Iowa |
| 42 | Carl W. Glider | 24 | Son | Mechanic | Iowa |
| 43 | Apal L. Glider | 21 | Daughter | Teacher | Iowa |
| 44 | Hazel M. Glider | 14 | Daughter | — | Iowa |
| 45 | Arlis J. Glider | 12 | Son | — | Iowa |
| 46 | Ralph V. Glider | 23 | Son | Farmer | Iowa |
| 47 | Apal D. Glider | 20 | Daughter | — | Iowa |
| 48 | Annie E. D. Gabriel | 61 | Head | Housekeeper | Iowa |
| 49 | Grace C. Gabriel | 57 | Wife | — | Iowa |
| 50 | Wayne L. Gabriel | 14 | Son | — | Iowa |
| 51 | John A. Canott | 44 | Head | Farmer | Iowa |
| 52 | Pearl M. Canott | 37 | Wife | — | Iowa |
| 53 | Mildred E. Canott | 12 | Daughter | — | Iowa |
| 54 | Virginia A. Canott | 10 | Daughter | — | Iowa |
| 55 | Evelyn Canott | 5 | Daughter | — | Iowa |
| 56 | Jane S. Canott | 80 | Head | — | Iowa |
| 57 | John S. Canott | 19 | Grandson | Manager | Iowa |
| 58 | Lloyd H. Lemley | 25 | Head | Farmer | Iowa |
| 59 | Ida C. D. Lemley | 24 | Wife | — | Iowa |
| 60 | George L. Brown | 56 | Head | Farmer | Iowa |
| 61 | Mamie D. Brown | 47 | Wife | — | Iowa |
| 62 | Harold G. Brown | 22 | Son | Laborer | Iowa |
| 63 | Edward C. Henn | 55 | Head | Farmer | Iowa |
| 64 | Minerva E. Henn | 47 | Wife | — | North Dakota |
| 65 | Marcia L. Henn | 17 | Daughter | — | Iowa |
| 66 | Margaret E. Henn | 14 | Daughter | — | Iowa |
| 67 | Ralph L. Foster | 55 | Head | Farmer | Iowa |
| 68 | Anna B. Foster | 54 | Wife | — | Iowa |
| 69 | Emma H. Smith | 73 | Head | Farmer | Iowa |
| 70 | Halda F. Smith | 35 | Son | Laborer | Iowa |
| 71 | Thomas R. Johnson THIS PERSON | 40 | Head | Farmer | Iowa |
| 72 | Nina B. Johnson | 38 | Wife | — | Louisiana |
| 73 | Roy H. Johnson | 18 | Son | Laborer | Iowa |
| 74 | Wayne E. Johnson | 15 | Son | — | Iowa |
| 75 | Joseph S. Janecek | 32 | Head | Farmer | Illinois |
| 76 | Anna Janecek | 27 | Wife | — | Illinois |
| 77 | Mary G. Janecek | 5 | Daughter | — | Iowa |
| 78 | Barbara R. Janecek | 4 | Daughter | — | Iowa |
| 79 | Elberta J. Janecek | 2 | Daughter | — | Iowa |
| 80 | Arvid L. Gray | 71 | Head | Farmer | Iowa |
Pedigree Summary
Thomas
Gen 1 · 3 parents
~0.78
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)