MJ
Marvin Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mills-County, Iowa
Our Model Tree links this Marvin Johnson across the 1910, 1920, 1930 and 1940 US Censuses in Mills-County, Iowa (XGBoost, ~Confirmed), with identified parents Elmer & Emma — first a head (b.~1894), then head of a 4-person household.
Age 46
b. ~1894
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mills-County, Iowa |
| Surname | Johnson |
| Given Name | Marvin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Center Township |
| 1935 Residence (County) | Mills |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | E |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Center Township |
| Est. Birth Year | ~1894 |
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 |
|---|---|---|---|---|
| Dorothy Johnson | Daughter | — | 17 | ~1923 |
| Allie Johnson | Spouse | — | 43 | ~1897 |
| Marvin Johnson | Head | — | 46 | ~1894 |
| Clara Johnson | Daughter | — | 13 | ~1927 |
Census Appearances
1910
Mills, Iowa
Son, age 16
Mills, Iowa · implied b. ~1894 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Marvin L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | General Farm |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1920
Mills, Iowa
Head, age 26
Mills, Iowa · implied b. ~1894 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Marvin J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Mills, Iowa
Head, age 36
Mills, Iowa · implied b. ~1894 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Mervin L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 21 |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | E |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Mills-County, Iowa
Head, age 46
Mills-County, Iowa · implied b. ~1894 — 4 household members
| Surname | Johnson |
| Given Name | Marvin |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Center Township |
| 1935 Residence (County) | Mills |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | E |
| Hours Worked | 52 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| 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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Elmer Johnson (~0.92 confidence) and mother Emma Johnson (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Elmer Johnson
b. ~1867
Source father
● Household
· direct · ~0.92
Mother
Emma Johnson
b. ~1869
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Marvin Johnson
Head · 1940 · age 46 · b. ~1894 · 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 — Mills-County, Iowa
Open full size
1940 US Federal Census — Mills-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01183-00043)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Janice Hayes | 5 | Daughter | — | Iowa |
| 2 | Larry Hayes | 2 | Son | — | Iowa |
| 3 | Marvin Johnson THIS PERSON | 46 | Head | Farmer | Iowa |
| 4 | Allie Johnson | 43 | Wife | — | Iowa |
| 5 | Dorothy Johnson | 17 | Daughter | — | Iowa |
| 6 | Clara Johnson | 13 | Daughter | — | Iowa |
| 7 | Russell Prine | 23 | Head | Farm Laborer | Missouri |
| 8 | Elsie Prine | 22 | Wife | — | Arkansas |
| 9 | Ellouise Prine | 0 | Son | — | Iowa |
| 10 | L. G. Jens | 56 | Head | Farmer | Iowa |
| 11 | Anna Jens | 53 | Wife | — | Iowa |
| 12 | Louis Jens | 19 | Son | Farm Laborer | Iowa |
| 13 | Edwin Jens | 17 | Son | — | Iowa |
| 14 | Charles Happ | 42 | Head | Farmer | Iowa |
| 15 | Ella Happ | 39 | Wife | — | Iowa |
| 16 | Darnell Happ | 3 | Son | — | Iowa |
| 17 | G. W. Watkins | 67 | Hired Hand | Farm Laborer | Iowa |
| 18 | Darin Watkins | 27 | Hired Hand | Farm Laborer | Iowa |
| 19 | Wm Jens | 54 | Head | Farmer | Iowa |
| 20 | Elsie Jens | 46 | Wife | — | Nebraska |
| 21 | Leonard Jens | 19 | Son | — | Iowa |
| 22 | M. R. Jens | 11 | Son | — | Iowa |
| 23 | Joe Harbold | 57 | Head | Farmer | Pa. |
| 24 | Ada Harbold | 51 | Wife | — | Iowa |
| 25 | Jesse Harbold | 24 | Son | Farmer | Iowa |
| 26 | Lucile Harbold | 30 | Daughter | — | Iowa |
| 27 | Bonnie Harbold | 19 | Daughter | — | Iowa |
| 28 | Fae Harbold | 17 | Daughter | — | Iowa |
| 29 | Julius Roenfeldt | 69 | Head | Farmer | Germany |
| 30 | Meta Roenfeldt | 40 | Daughter | — | Iowa |
| 31 | Clara Roenfeldt | 38 | Daughter | — | Iowa |
| 32 | Emil Roenfeldt | 23 | Son | Farm Laborer | Iowa |
| 33 | Marvin Pierce | 29 | Hired Hand | Farm Laborer | Iowa |
| 34 | Rudolph Jr. Happ | 41 | Head | Farmer | Iowa |
| 35 | Marjory Happ | 35 | Wife | — | Iowa |
| 36 | Regine Happ | 14 | Daughter | — | Iowa |
| 37 | Rose Mary Happ | 13 | Daughter | — | Iowa |
| 38 | John Jens | 59 | Head | Farmer | Iowa |
| 39 | Anna Jens | 50 | Wife | — | Nebraska |
| 40 | Alta Jens | 26 | Daughter | — | Iowa |
Related Census Records
Pedigree Summary
Marvin
Gen 1 · 2 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)