FJ
Fred Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Cassia-County, Idaho
Our Model Tree links this Fred Johnson across the 1920, 1930 and 1940 US Censuses in Cassia-County, Idaho (XGBoost, ~Confirmed), with identified parents Axel & Carlson — first a son (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Male
Son
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cassia-County, Idaho |
| Surname | Johnson |
| Given Name | Fred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Springdale Precinct |
| 1935 Residence (County) | Cassia |
| Additional Details | |
| Hours Worked | 40 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Township / Ward | Springdale Precinct |
| 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 Fred | Age | Birth yr |
|---|---|---|---|---|
| Axel Johnson | Head | — | 66 | ~1874 |
| Fred Johnson | Son | — | 22 | ~1918 |
| Caroline Johnson | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Cassia, Idaho
Son, age 2
Cassia, Idaho · implied b. ~1918 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Fred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1930
Cassia, Idaho
Son, age 12
Cassia, Idaho · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Fredrick H |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Cassia-County, Idaho
Son, age 22
Cassia-County, Idaho · implied b. ~1918 — 3 household members
| Surname | Johnson |
| Given Name | Fred |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Springdale Precinct |
| 1935 Residence (County) | Cassia |
| Hours Worked | 40 |
| Highest Grade | H-4 |
| 1935 Residence | Same house |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
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 Fred Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Axel Johnson (~0.92 confidence) and father Carlson Johnson (~0.92 confidence) and father Axel Johnson (~0.92 confidence) and mother Carolina Johnson (~0.92 confidence) and mother Caroline Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Axel Johnson
b. ~1874
Source father
● Household
· direct · ~0.92
Father
Carlson Johnson
b. ~1860
Source father
● Household
· direct · ~0.92
Father
Axel Johnson
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Carolina Johnson
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Caroline Johnson
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Fred Johnson
Son · 1940 · age 22 · b. ~1918 · Idaho
★ 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 — Cassia-County, Idaho
Open full size
1940 US Federal Census — Cassia-County, Idaho
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00744-00513)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen S Edgar | 21 | Daughter | — | Utah |
| 2 | Frank J Edgar | 19 | Son | — | Utah |
| 3 | Bertha E Edgar | 16 | Daughter | — | Utah |
| 4 | Mary L Edgar | 14 | Daughter | — | Utah |
| 5 | Peter A Nielsen | 58 | Head | Farmer | Denmark |
| 6 | Juliana G Nielsen | 57 | Wife | — | Utah |
| 7 | Gordon E Nielsen | 24 | Son | Laborer | Utah |
| 8 | Julius E Nielsen | 16 | Son | — | Idaho |
| 9 | Josephine Manning | 31 | Head | — | Utah |
| 10 | Roland W Manning | 14 | Son | — | Idaho |
| 11 | Virginia Manning | 12 | Daughter | — | Idaho |
| 12 | Donna R Manning | 9 | Daughter | — | Idaho |
| 13 | George O Kerbs | 25 | Head | Farmer | Idaho |
| 14 | Norma Kerbs | 22 | Wife | — | Idaho |
| 15 | Eugene G Kerbs | 2 | Son | — | Idaho |
| 16 | Lorraine Kerbs | 0 | Daughter | — | Idaho |
| 17 | Dwight E Droz | 27 | Head | Carpenter | Kansas |
| 18 | Pauline Droz | 21 | Wife | — | Missouri |
| 19 | Walter E Saylor | 57 | Head | Farmer | Indiana |
| 20 | Ruth A Saylor | 45 | Wife | — | Indiana |
| 21 | C Earl Saylor | 5 | Son | — | Idaho |
| 22 | E Beth Saylor | 2 | Daughter | — | Idaho |
| 23 | Robert F O Simpson | 39 | Head | Laborer | Nebraska |
| 24 | Ada L Simpson | 39 | Wife | — | Nebraska |
| 25 | Betty L Simpson | 11 | Daughter | — | Nebraska |
| 26 | Axel E O Johnson | 66 | Head | Farmer | Sweden |
| 27 | Caroline Johnson | 60 | Wife | — | Sweden |
| 28 | Fred Johnson THIS PERSON | 22 | Son | — | Idaho |
| 29 | La Grand Woodbury | 23 | Head | Laborer | Idaho |
| 30 | Lydia Woodbury | 21 | Wife | — | Utah |
| 31 | Leo A Clayton | 42 | Head | Farmer | Utah |
| 32 | Adelaide Clayton | 39 | Wife | — | Canada |
| 33 | Duwayne G Clayton | 19 | Son | — | Utah |
| 34 | Gerald A Clayton | 14 | Son | — | Idaho |
| 35 | Ina Clayton | 12 | Daughter | — | Idaho |
| 36 | Gene R Clayton | 4 | Son | — | Idaho |
| 37 | John W O Baker | 53 | Head | Farmer | Missouri |
| 38 | Emma I Baker | 53 | Wife | — | Illinois |
| 39 | Nellie M Baker | 18 | Daughter | — | Idaho |
| 40 | Loma R Baker | 14 | Daughter | — | Idaho |
Pedigree Summary
Fred
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)