OC
Oscar Carlson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mclean-County, North Dakota
Our Model Tree links this Oscar Carlson across the 1920, 1930 and 1940 US Censuses in Mclean-County, North Dakota (XGBoost, ~Confirmed), with identified parents Myrtle — first a head (b.~1903), then head of a 5-person household.
Age 37
b. ~1903
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mclean-County, North Dakota |
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | T 145 R 84 Sundre |
| 1935 Residence (County) | McLean |
| Additional Details | |
| Occupation | Farming |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 1200 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farming |
| Township / Ward | T 145 R 84 Sundre |
| Est. Birth Year | ~1903 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Oscar | Age | Birth yr |
|---|---|---|---|---|
| Esther Carlson | Spouse | — | 37 | ~1903 |
| Oscar Carlson | Head | — | 37 | ~1903 |
| David Carlson | Son | — | ~1940 | |
| Lorraine Carlson | Daughter | — | 10 | ~1930 |
| Gerald Carlson | Son | — | 6 | ~1934 |
Census Appearances
1920
Mclean, North …
Son, age 16
Mclean, North Dakota · implied b. ~1904 — 7 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 | Iowa |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Mclean, North …
Other, age 26
Mclean, North Dakota · implied b. ~1904 — 41 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carlson |
| Given Name | Oscar C. |
| Relationship to Head | R |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 24 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Denmark |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Radio Set | R |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Mclean-County, North …
Head, age 37
Mclean-County, North Dakota · implied b. ~1903 — 5 household members
| Surname | Carlson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | T 145 R 84 Sundre |
| 1935 Residence (County) | McLean |
| Occupation | Farming |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 52 |
| Income (1939) | 1200 |
| Highest Grade | H-2 |
| 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 Oscar Carlson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Myrtle Carlson (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Myrtle Carlson
b. ~1871
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Carlson
Head · 1940 · age 37 · b. ~1903 · North Dakota
★ 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 — Mclean-County, North Dakota
Open full size
1940 US Federal Census — Mclean-County, North Dakota
Page Contents
23 people indexed on this census page (nara:1940:m-t0627-03006-00816)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Marvin Mowin | 15 | Son | — | North Dak |
| 2 | Ruben Mowin | 12 | Son | — | North Dak |
| 3 | Melvin Mowin | 8 | Son | — | North Dak |
| 4 | Elias Bader | 36 | Head | Laborer | North Dak |
| 5 | Johanna Bader | 33 | Wife | — | North Dak |
| 6 | Leroy Bader | 10 | Son | — | North Dak |
| 7 | Lelada Bader | 7 | Daughter | — | North Dak |
| 8 | Lorraine Bader | 5 | Daughter | — | North Dak |
| 9 | Arlan Bader | 3 | Son | — | North Dak |
| 10 | Oscar Carlson THIS PERSON | 37 | Head | Farming | Iowa |
| 11 | Esther Carlson | 37 | Wife | — | Minn |
| 12 | Lorraine Carlson | 10 | Daughter | — | North Dak |
| 13 | Gerald Carlson | 6 | Son | — | North Dak |
| 14 | David Carlson | 0 | Son | — | North Dak |
| 15 | John Lueck | 56 | Head | Farming | South Dak |
| 16 | Margreta Lueck | 53 | Wife | — | Georgia |
| 17 | Doris Lueck | 29 | Daughter | — | North Dak |
| 18 | Evelyn Lueck | 26 | Son | Farm Help | North Dak |
| 19 | Wesley Lueck | 24 | Son | Farm Help | North Dak |
| 20 | James Lueck | 22 | Son | Farm Help | North Dak |
| 21 | Lorraine Lueck | 17 | Daughter | — | North Dak |
| 22 | Ione Lueck | 15 | Daughter | — | North Dak |
| 23 | Elsa Lueck | 13 | Daughter | — | North Dak |
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)