MJ
Marvin Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Webster-County, Iowa
Our Model Tree links this Marvin Johnson across the 1920, 1930 and 1940 US Censuses in Webster-County, Iowa (XGBoost, ~Confirmed), with identified parents Carl & Carl — first a son (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Webster-County, Iowa |
| Surname | Johnson |
| Given Name | Marvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cooper Twp |
| 1935 Residence (County) | Webster |
| Additional Details | |
| Occupation | Laborer |
| Industry | Cement Factory |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 500 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Laborer |
| Township / Ward | Cooper Twp |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Marvin | Age | Birth yr |
|---|---|---|---|---|
| Lois Johnson | Daughter | — | 16 | ~1924 |
| Gertrude Johnson | Spouse | — | 46 | ~1894 |
| Marvin Johnson | Son | — | 22 | ~1918 |
| Carl Johnson | Head | — | 46 | ~1894 |
Census Appearances
1920
Webster, Iowa
Son, age 1
Webster, Iowa · implied b. ~1919 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Marvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Webster, Iowa
Son, age 12
Webster, Iowa · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Marvin C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Webster-County, Iowa
Son, age 22
Webster-County, Iowa · implied b. ~1918 — 4 household members
| Surname | Johnson |
| Given Name | Marvin |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Cooper Twp |
| 1935 Residence (County) | Webster |
| Occupation | Laborer |
| Industry | Cement Factory |
| Class of Worker | PW |
| Hours Worked | 8 |
| Income (1939) | 500 |
| 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 Marvin Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Carl Johnson (~0.92 confidence) and father Carl Johnson (~0.92 confidence) and mother Gertrude Johnson (~0.92 confidence) and mother Gertrude Johnson (~0.92 confidence) and mother Ruth Johnson (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Carl Johnson
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Carl Johnson
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Gertrude Johnson
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Gertrude Johnson
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Ruth Johnson
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Marvin Johnson
Son · 1940 · age 22 · b. ~1918 · Iowa
★ You are viewing this record
Sibling
Lois Johnson
Sibling · 1940 · age 16
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 — Webster-County, Iowa
Open full size
1940 US Federal Census — Webster-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01212-00135)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Grimes | 15 | Head | — | Iowa |
| 2 | Frances Grimes | 13 | Daughter | — | Iowa |
| 3 | Mary Grimes | 11 | Daughter | — | Iowa |
| 4 | Ed J Poulson | 47 | Head | Butcher | Iowa |
| 5 | Belle Poulson | 47 | Wife | — | Iowa |
| 6 | Herbert Poulson | 19 | Son | — | Iowa |
| 7 | John Poulson | 17 | Son | — | Iowa |
| 8 | Robert Poulson | 15 | Son | — | Iowa |
| 9 | Dorothy Poulson | 11 | Daughter | — | Iowa |
| 10 | Margaret Poulson | 7 | Daughter | — | Iowa |
| 11 | Lulu Mitchell | 63 | Head | — | Iowa |
| 12 | Lulu Mitchell | 63 | Wife | — | Iowa |
| 13 | J G Raymond | 41 | Head | Collector | Wisc |
| 14 | Amelia Raymond | 43 | Wife | — | Nebr |
| 15 | Helen Raymond | 16 | Daughter | — | Iowa |
| 16 | Marjorie Raymond | 12 | Daughter | — | Iowa |
| 17 | Frank Raymond | 8 | Son | — | Iowa |
| 18 | Mary Raymond | 5 | Daughter | — | Iowa |
| 19 | Betty Raymond | 2 | Daughter | — | Iowa |
| 20 | Carl Johnson | 46 | Head | Farmer | Iowa |
| 21 | Gertrude Johnson | 46 | Wife | — | Iowa |
| 22 | Marvin Johnson THIS PERSON | 22 | Son | Laborer | Iowa |
| 23 | Lois Johnson | 16 | Daughter | — | Iowa |
| 24 | Ed Engler | 59 | Head | — | Iowa |
| 25 | Mae Engler | 43 | Wife | — | Iowa |
| 26 | Clara Engler | 27 | Daughter | — | Iowa |
| 27 | Jack Mikes | 50 | Head | Laborer | Iowa |
| 28 | Clara Mikes | 50 | Wife | — | Rhode Island |
| 29 | John Mikes | 24 | Son | Laborer | Iowa |
| 30 | Robert Mikes | 20 | Son | Laborer | Iowa |
| 31 | John Mikes | 18 | Son | — | Iowa |
| 32 | Lillian Mikes | 15 | Daughter | — | Iowa |
| 33 | Roy Carlson | 42 | Head | Clerk | Italy |
| 34 | Roy De Moyer | 28 | Head | Teacher | Iowa |
| 35 | Raymond De Moyer | 27 | Wife | — | Iowa |
| 36 | Lola De Moyer | 5 | Daughter | — | Iowa |
| 37 | Lola De Moyer | 7 | Daughter | — | Iowa |
| 38 | Florence De Moyer | 4 | Daughter | — | Iowa |
| 39 | John Hall | 44 | Head | Laborer | Iowa |
| 40 | Lulu Hall | 34 | Wife | — | Iowa |
Pedigree Summary
Marvin + 1 sibling
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)