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Isaac Johnson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Iron-County, Michigan
Our Model Tree links this Isaac Johnson across the 1920, 1930 and 1940 US Censuses in Iron-County, Michigan (XGBoost, ~Confirmed), with identified parents Charlie & Nicholas — first a son (b.~1910), then head of a 8-person household.
Age 30
b. ~1910
Male
Son
Born: Michigan
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Iron-County, Michigan |
| Surname | Johnson |
| Given Name | Isaac A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Mastodon Township |
| 1935 Residence (County) | Iron |
| Additional Details | |
| Occupation | New Worker |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
| Occupation | New Worker |
| Township / Ward | Mastodon Township |
| Est. Birth Year | ~1910 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Isaac | Age | Birth yr |
|---|---|---|---|---|
| Bertha Johnson | Daughter | — | 21 | ~1919 |
| Helmi Johnson | Daughter | — | 20 | ~1920 |
| Norma Johnson | Daughter | — | 13 | ~1927 |
| Nicholas Johnson | Head | — | 57 | ~1883 |
| George Johnson | Son | — | 25 | ~1915 |
| John Johnson | Son | — | 32 | ~1908 |
| Isaac Johnson | Son | — | 30 | ~1910 |
| Matilda Johnson | Spouse | — | 56 | ~1884 |
Census Appearances
1920
Iron, Michigan
Son, age 10
Iron, Michigan · implied b. ~1910
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Johnson |
| Given Name | Ivor |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1930
Iron, Michigan
Son, age 20
Iron, Michigan · implied b. ~1910 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Ivan |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Michigan |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Can Read/Write | Yes |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
1940
Iron-County, Michigan
Son, age 30
Iron-County, Michigan · implied b. ~1910 — 8 household members
| Surname | Johnson |
| Given Name | Isaac A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Michigan |
| 1935 Residence (City) | Mastodon Township |
| 1935 Residence (County) | Iron |
| Occupation | New Worker |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Michigan |
| Birth Country | United States |
| Birthplace (normalized) | michigan |
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 Isaac Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charlie Johnson (~0.92 confidence) and father Nicholas Johnson (~0.92 confidence) and mother Matilda Johnson (~0.92 confidence) and mother Mary Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charlie Johnson
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Nicholas Johnson
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Matilda Johnson
b. ~1884
Source mother
● Household
· direct · ~0.92
Mother
Mary Johnson
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Isaac Johnson
Son · 1940 · age 30 · b. ~1910 · Michigan
★ You are viewing this record
Sibling
Bertha Johnson
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Norma Johnson
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Johnson
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Johnson
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helmi Johnson
Sibling · 1940 · age 20
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 — Iron-County, Michigan
Open full size
1940 US Federal Census — Iron-County, Michigan
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01765-00674)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lydia Kallio | 44 | Wife | — | Finland |
| 2 | Raymond H. Kallio | 20 | Son | Laborer | Michigan |
| 3 | Roy E. Kallio | 18 | Son | — | Michigan |
| 4 | Scilla J. Belongie | 42 | Head | Laborer | Michigan |
| 5 | Ida V. Belongie | 31 | Wife | — | Wisconsin |
| 6 | S. Francis Belongie | 11 | Son | — | Michigan |
| 7 | L. Laura Belongie | 9 | Daughter | — | Michigan |
| 8 | Clyde P. Belongie | 7 | Son | — | Michigan |
| 9 | Arthur W. Belongie | 3 | Son | — | Michigan |
| 10 | George J. Raymond | 60 | Head | Laborer | Poland |
| 11 | Elizabeth Raymond | 53 | Wife | — | Poland |
| 12 | Eleanor Raymond | 16 | Daughter | Laborer | Pennsylvania |
| 13 | Alphonse Raymond | 15 | Son | — | Pennsylvania |
| 14 | Martha M. Raymond | 7 | Daughter | — | Michigan |
| 15 | Andrew R. Kmiacek | 62 | Head | Laborer | Poland |
| 16 | Sophia Kmiacek | 55 | Wife | — | Poland |
| 17 | Angelo Battistello | 48 | Head | Laborer | Italy |
| 18 | Judith Battistello | 51 | Wife | — | Italy |
| 19 | Attilio J. Battistello | 19 | Son | Laborer | Michigan |
| 20 | Amidio M. Battistello | 17 | Son | — | Michigan |
| 21 | Orpheo P. Battistello | 15 | Son | — | Michigan |
| 22 | Jack Egnatchik | 53 | Head | — | Russia |
| 23 | William M. Erickson | 70 | Head | Farmer | Finland |
| 24 | William Jutila | 36 | Son-in-law | Farmer | Michigan |
| 25 | Ida S. Jutila | 32 | Daughter | — | Michigan |
| 26 | Vieno M. Yoki | 42 | Head | — | Finland |
| 27 | Helen E. Yoki | 15 | Daughter | — | Michigan |
| 28 | Wesley J. Yoki | 14 | Son | — | Michigan |
| 29 | Evelyn M. Yoki | 9 | Daughter | — | Michigan |
| 30 | Nicholas Johnson | 57 | Head | Farmer | Finland |
| 31 | Matilda M. Johnson | 56 | Wife | — | Finland |
| 32 | John S. Johnson | 32 | Son | Laborer | Michigan |
| 33 | Isaac A. Johnson THIS PERSON | 30 | Son | New Worker | Michigan |
| 34 | George H. Johnson | 25 | Son | New Worker | Michigan |
| 35 | Bertha M. Johnson | 21 | Daughter | — | Michigan |
| 36 | Helmi A. Johnson | 20 | Daughter | — | Michigan |
| 37 | Norma I. Johnson | 13 | Daughter | — | Michigan |
| 38 | Toivo J. Wierikko | 40 | Head | Laborer | Finland |
| 39 | Helmi E. Wierikko | 35 | Wife | — | Finland |
| 40 | Agnes E. Wierikko | 17 | Daughter | — | Michigan |
Related Census Records
Pedigree Summary
Isaac + 5 siblings
Gen 1 · 4 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)