OC
Oscar Carlson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Isanti-County, Minnesota
Our Model Tree links this Oscar Carlson across the 1900, 1910, 1920, 1930 and 1940 US Censuses in Isanti-County, Minnesota (XGBoost, ~Confirmed), with identified parents Carra — first a head (b.~1884), then head of a 4-person household.
Age 56
b. ~1884
Male
Head
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Isanti-County, Minnesota |
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Maple Ridge Township |
| 1935 Residence (County) | Isanti |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Maple Ridge Township |
| Est. Birth Year | ~1884 |
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 Oscar | Age | Birth yr |
|---|---|---|---|---|
| Irving Carlson | Son | — | 19 | ~1921 |
| Marion Carlson | Daughter | — | 16 | ~1924 |
| Mary Carlson | Spouse | — | 50 | ~1890 |
| Oscar Carlson | Head | — | 56 | ~1884 |
Census Appearances
1900
Isanti, Minnesota
Son, age 17
Isanti, Minnesota · implied b. ~1883 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Birth Month | Dec |
| Birth Year | 1883 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farm Laborer |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1910
Isanti, Minnesota
Son, age 26
Isanti, Minnesota · implied b. ~1884 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farm Laborer |
| Industry | Home Farm |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1920
Isanti, Minnesota
Head, age 36
Isanti, Minnesota · implied b. ~1884 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Oscar E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Chisago, Minnesota
Head, age 45
Chisago, Minnesota · implied b. ~1885 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Oscar J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Age at First Marriage | 26 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Radio Set | R |
| Veteran | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Isanti-County, Minnesota
Head, age 56
Isanti-County, Minnesota · implied b. ~1884 — 4 household members
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Maple Ridge Township |
| 1935 Residence (County) | Isanti |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Oscar Carlson across 5 US Census years (1900, 1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: mother Carra Carlson (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Carra Carlson
b. ~1859
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Carlson
Head · 1940 · age 56 · b. ~1884 · Minnesota
★ 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 — Isanti-County, Minnesota
Open full size
1940 US Federal Census — Isanti-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01927-01060)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mildred Olson | 24 | Daughter | — | Minnesota |
| 2 | Wayne Olson | 5 | Son | — | Minnesota |
| 3 | Wanda Olson | 2 | Daughter | — | Minnesota |
| 4 | Anton Johnson | 51 | Head | — | Minnesota |
| 5 | Lovida Johnson | 44 | Wife | — | Minnesota |
| 6 | Fred Norling | 61 | Head | Farmer | Minnesota |
| 7 | Carrie Norling | 61 | Wife | — | Sweden |
| 8 | Reuben Norling | 20 | Son | Farmer | Minnesota |
| 9 | William Norling | 41 | Head | Farm Laborer | Minnesota |
| 10 | Florence Norling | 36 | Wife | — | Minnesota |
| 11 | Marion Norling | 14 | Daughter | Laborer | Minnesota |
| 12 | David Lundeen | 41 | Head | — | Minnesota |
| 13 | Alma Lundeen | 42 | Wife | — | Minnesota |
| 14 | Henry Randen | 46 | Head | Farmer | Minnesota |
| 15 | Signe Randen | 57 | Wife | — | Sweden |
| 16 | Arvid Berglund | 69 | Head | Farmer | Sweden |
| 17 | Erick P. Back | 76 | Lodger | — | Sweden |
| 18 | Einar Moen | 29 | Head | Farmer | Norway |
| 19 | Verna Moen | 23 | Wife | — | Minnesota |
| 20 | Robert Moen | 4 | Son | — | Minnesota |
| 21 | Dean Moen | 2 | Son | — | Minnesota |
| 22 | Michael Moen | 2 | Son | — | Minnesota |
| 23 | Carl S. Severson | 43 | Head | — | Minnesota |
| 24 | Mary Severson | 67 | Mother | Farmer | Minnesota |
| 25 | Oscar Carlson THIS PERSON | 56 | Head | — | Minnesota |
| 26 | Mary Carlson | 50 | Wife | Farmer | Minnesota |
| 27 | Irving Carlson | 19 | Son | — | Minnesota |
| 28 | Marion Carlson | 16 | Daughter | Farm Laborer | Minnesota |
| 29 | Andrew Lundeen | 63 | Head | — | Sweden |
| 30 | Amanda Lundeen | 61 | Wife | Farmer | Sweden |
| 31 | Anna Lundeen | 31 | Daughter | — | Minnesota |
| 32 | Clifford Lundeen | 31 | Son | — | Minnesota |
| 33 | Millie Lundeen | 27 | Daughter | — | Minnesota |
| 34 | Walter Lundeen | 3 | Grandson | — | Minnesota |
| 35 | Anna Holm | 73 | Mother-in-law | — | Sweden |
| 36 | Oscar F. Johnson | 62 | Head | — | Sweden |
| 37 | Emma Johnson | 46 | Wife | Farmer | Minnesota |
| 38 | Vernon Johnson | 21 | Son | — | Minnesota |
| 39 | Vernal Johnson | 20 | Son | Farm Laborer | Minnesota |
| 40 | Myrette Johnson | 18 | Daughter | Farm Laborer | Minnesota |
Pedigree Summary
Oscar
Gen 1 · 1 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)