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John Jacobson — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Louis-County, Minnesota
Our Model Tree links this John Jacobson across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Minnesota (XGBoost, ~Confirmed), with identified parents Jonas & Matt — first a son (b.~1894), then head of a 3-person household.
Age 46
b. ~1894
Male
Son
Born: Finland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Minnesota |
| Surname | Jacobson |
| Given Name | John S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Single |
| Birthplace | Finland |
| 1935 Residence (City) | Town of Sandy |
| 1935 Residence (County) | St Louis |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Sawmill Operat. |
| Industry | Saw Mill |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 156 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Occupation | Sawmill Operat. |
| Township / Ward | Town Of Sandy |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| William Jacobson | Son | — | 37 | ~1903 |
| John Jacobson | Son | — | 46 | ~1894 |
| Jonas Jacobson | Head | — | 69 | ~1871 |
Census Appearances
1920
St Louis, …
Son, age 28
St Louis, Minnesota · implied b. ~1892 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobson |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Finland |
| Year of Immigration | 1892 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Fin |
| Mother's Birthplace | Fin |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Finnish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1930
St Louis, …
Son, age 39
St Louis, Minnesota · implied b. ~1891 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Jacobson |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Finland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1892 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Veteran | No |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
St.-Louis-County, Minnesota
Son, age 46
St.-Louis-County, Minnesota · implied b. ~1894 — 3 household members
| Surname | Jacobson |
| Given Name | John S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Single |
| Birthplace | Finland |
| 1935 Residence (City) | Town of Sandy |
| 1935 Residence (County) | St Louis |
| Naturalization Status | Naturalized |
| Occupation | Sawmill Operat. |
| Industry | Saw Mill |
| Class of Worker | PW |
| Hours Worked | 26 |
| Income (1939) | 156 |
| Highest Grade | No 6 |
| 1935 Residence | Same House |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 John Jacobson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Jonas Jacobson (~0.92 confidence) and father Matt Jacobson (~0.92 confidence) and mother Elma Jacobson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jonas Jacobson
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Matt Jacobson
b. ~1860
Source father
● Household
· direct · ~0.92
Mother
Elma Jacobson
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Jacobson
Son · 1940 · age 46 · b. ~1894 · Minnesota
★ You are viewing this record
Sibling
William Jacobson
Sibling · 1940 · age 37
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 — St.-Louis-County, Minnesota
Open full size
1940 US Federal Census — St.-Louis-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01957-00205)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ernest H Jacobson | 52 | Son | Barber | Minn |
| 2 | Gilbert H Dickerson | 44 | Head | Postmaster | Ill |
| 3 | Elva M Dickerson | 40 | Wife | — | Minn |
| 4 | Andrew M Hiekala | 36 | Head | Section Hand | Minn |
| 5 | Gertrude S Hiekala | 33 | Wife | — | Mich |
| 6 | Emil E Leitila | 53 | Head | Operator | Finland |
| 7 | Mary Leitila | 47 | Wife | — | Finland |
| 8 | A. Elmer Leitila | 16 | Son | — | Minn |
| 9 | Elma E Leitila | 13 | Daughter | — | Minn |
| 10 | Joe E Kumpula | 56 | Head | — | Mich |
| 11 | Matt Huta | 65 | Head | Operator | Finland |
| 12 | Matilda Huta | 63 | Wife | — | Finland |
| 13 | Hatfield J Huta | 28 | Son | Farm Hand | Minn |
| 14 | Aili E Huta | 21 | Daughter | Attendant Nurse | Minn |
| 15 | Alfred E Kaski | 37 | Head | Operator | Minn |
| 16 | E. Viola Kaski | 31 | Wife | — | N.D. |
| 17 | Daphne D Kaski | 2 | Daughter | — | Minn |
| 18 | Alben A Kaski | 0 | Son | — | Minn |
| 19 | Fred J Lemmer | 48 | Head | Operator | Minn |
| 20 | Sarah J Lemmer | 44 | Wife | — | Wisc |
| 21 | Frederick C Lemmer | 16 | Son | New Worker | Minn |
| 22 | Sherman L Lemmer | 15 | Son | — | Minn |
| 23 | Adeline C Lemmer | 12 | Daughter | — | Minn |
| 24 | Sarah Janhola | 70 | Head | Operator | Finland |
| 25 | Arthur J Janhola | 38 | Son | Farm Hand | Minn |
| 26 | Gilbert Janhola | 36 | Son | Pit Man | Minn |
| 27 | Mabel S Janhola | 30 | Daughter | Housework | Minn |
| 28 | Albert O Janhola | 27 | Son | Farm Hand | Minn |
| 29 | Floyd B Maki | 24 | Grandson | Steel Layer | Minn |
| 30 | Frank O Kaski | 36 | Head | Operator | Minn |
| 31 | Alma A Kaski | 36 | Wife | — | Minn |
| 32 | Dorothy M Kaski | 18 | Daughter | — | Minn |
| 33 | Leonard J Kaski | 14 | Son | — | Minn |
| 34 | Chester E Mange | 25 | Lodger | Ditcher | Minn |
| 35 | Edward Hikama | 38 | Head | Operator | Sweden |
| 36 | Lola S Hikama | 36 | Wife | — | Minn |
| 37 | Clarence Hikama | 7 | Son | — | Minn |
| 38 | Jonas L Jacobson | 69 | Head | Operator | Finland |
| 39 | John S Jacobson THIS PERSON | 46 | Son | Sawmill Operat. | Finland |
| 40 | William Jacobson | 37 | Son | Farm Hand | Minn |
Pedigree Summary
John + 1 sibling
Gen 1 · 3 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)