OA
Oscar Anderson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mountrail-County, North Dakota
Our Model Tree links this Oscar Anderson across the 1920, 1930 and 1940 US Censuses in Mountrail-County, North Dakota (XGBoost, ~Confirmed), with identified parents Olga & John — first a head (b.~1908), then head of a 5-person household.
Age 32
b. ~1908
Male
Head
Born: North Dakota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mountrail-County, North Dakota |
| Surname | Anderson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | North Dakota |
| 1935 Residence (City) | Alger Twp |
| 1935 Residence (County) | Mountrail |
| Additional Details | |
| Occupation | farming |
| Industry | farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Occupation | Farming |
| Township / Ward | Alger Twp |
| Est. Birth Year | ~1908 |
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 |
|---|---|---|---|---|
| Beverly Anderson | Daughter | — | ~1940 | |
| Jean Anderson | Daughter | — | 4 | ~1936 |
| Eileen Anderson | Daughter | — | 2 | ~1938 |
| Oscar Anderson | Head | — | 32 | ~1908 |
| Beatrice Anderson | Spouse | — | 28 | ~1912 |
Census Appearances
1920
Mountrail, North …
Son, age 11
Mountrail, North Dakota · implied b. ~1909 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Oscar R. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1930
Mountrail, North …
Son, age 21
Mountrail, North Dakota · implied b. ~1909 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Oscar A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Mountrail-County, North …
Head, age 32
Mountrail-County, North Dakota · implied b. ~1908 — 5 household members
| Surname | Anderson |
| Given Name | Oscar |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | North Dakota |
| 1935 Residence (City) | Alger Twp |
| 1935 Residence (County) | Mountrail |
| Occupation | farming |
| Industry | farm |
| Class of Worker | OA |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
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 Anderson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Olga Anderson (~0.92 confidence) and father John Anderson (~0.92 confidence) and father Gahn Anderson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Olga Anderson
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
John Anderson
b. ~1881
Source father
● Household
· direct · ~0.92
Father
Gahn Anderson
b. ~1887
Source father
● Household
· direct · ~0.92
This person
Anchor record
Oscar Anderson
Head · 1940 · age 32 · b. ~1908 · 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 — Mountrail-County, North Dakota
Open full size
1940 US Federal Census — Mountrail-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03008-00007)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lorraine Thompson | 10 | daughter | — | North Dakota |
| 42 | Milford Thompson | 9 | son | — | North Dakota |
| 43 | Carol Thompson | 7 | daughter | — | North Dakota |
| 44 | Ardis Thompson | 5 | daughter | — | North Dakota |
| 45 | Joseph Molghon | 21 | laborer | Laborer | North Dakota |
| 46 | Nick Loren | 54 | Head | Farming | North Dakota |
| 47 | Malena Loren | 54 | wife | — | North Dakota |
| 48 | Leonard Loren | 26 | son | Logging | North Dakota |
| 49 | Marion Loren | 16 | daughter | — | North Dakota |
| 50 | Herman Piepkorn | 37 | Head | Farming | Minnesota |
| 51 | Olga Piepkorn | 33 | wife | — | North Dakota |
| 52 | Donald Piepkorn | 8 | son | — | North Dakota |
| 53 | Clarence Piepkorn | 7 | son | — | North Dakota |
| 54 | Leroy Piepkorn | 5 | son | — | North Dakota |
| 55 | Lida Piepkorn | 3 | daughter | — | North Dakota |
| 56 | Janet Piepkorn | 1 | daughter | — | North Dakota |
| 57 | Herbert Baumgartner | 42 | Head | Farming | Minnesota |
| 58 | Bertha Baumgartner | 38 | wife | — | Minnesota |
| 59 | Orville Baumgartner | 9 | son | — | North Dakota |
| 60 | Esther Nordquist | 30 | lodger | Teacher | North Dakota |
| 61 | Frank Nichols | 67 | Head | Farming | Canada |
| 62 | John Anderson | 59 | Head | Farming | Sweden |
| 63 | Olga Anderson | 60 | wife | — | Sweden |
| 64 | Vernon Anderson | 30 | son | Farming | North Dakota |
| 65 | Lawrence Anderson | 25 | son | Laborer | North Dakota |
| 66 | Arvid Anderson | 22 | son | Laborer | North Dakota |
| 67 | Axel Anderson | 19 | son | Laborer | North Dakota |
| 68 | Hazel Hopper | 24 | daughter | — | North Dakota |
| 69 | Sherman Hopper | 1 | grandson | — | New York |
| 70 | Betty Lou Hopper | 1 | granddaughter | — | North Dakota |
| 71 | Oscar Anderson THIS PERSON | 32 | Head | Farming | North Dakota |
| 72 | Beatrice Anderson | 28 | wife | — | North Dakota |
| 73 | Jean Marie Anderson | 4 | daughter | — | North Dakota |
| 74 | Eileen Anderson | 2 | daughter | — | North Dakota |
| 75 | Beverly Anderson | 0 | daughter | — | North Dakota |
| 76 | Bert Foss | 53 | Head | Laborer | North Dakota |
| 77 | Tine Foss | 45 | wife | — | North Dakota |
| 78 | Lester Foss | 16 | son | — | North Dakota |
| 79 | George A. Bakke | 60 | Head | Farming | Minnesota |
| 80 | Emily Bakke | 57 | wife | — | Minnesota |
Pedigree Summary
Oscar
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)