AO
Andrew Olson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cavalier-County, North Dakota
Our Model Tree links this Andrew Olson across the 1930 and 1940 US Censuses in Cavalier-County, North Dakota (XGBoost, ~Confirmed) — first a son (b.~1917), then head of a 12-person household.
Age 23
b. ~1917
Male
Son
Born: North Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Cavalier-County, North Dakota |
| Surname | Olson |
| Given Name | Andrew M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Loam Township |
| 1935 Residence (County) | Cavalier |
| Additional Details | |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Occupation | Farm Laborer |
| Township / Ward | Loam Township |
| Est. Birth Year | ~1917 |
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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Andrew | Age | Birth yr |
|---|---|---|---|---|
| Ole Olson | Son | — | 10 | ~1930 |
| Ole Olson | Head | — | 66 | ~1874 |
| Andrew Olson | Son | — | 23 | ~1917 |
| Helga Olson | Daughter | — | 2 | ~1938 |
| Alda Olson | Daughter | — | 14 | ~1926 |
| Oliver Olson | Son | — | 18 | ~1922 |
| Hans Olson | Son | — | 12 | ~1928 |
| Lloyd Olson | Son | — | 16 | ~1924 |
| Helga Olson | Spouse | — | 48 | ~1892 |
| Henry Olson | Son | — | 22 | ~1918 |
| June Olson | Daughter | — | 7 | ~1933 |
| Verling Olson | Son | — | 20 | ~1920 |
Census Appearances
1930
Cavalier, North …
Son, age 13
Cavalier, North Dakota · implied b. ~1917 — 12 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Andrew M |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Cavalier-County, North …
Son, age 23
Cavalier-County, North Dakota · implied b. ~1917 — 12 household members
| Surname | Olson |
| Given Name | Andrew M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Loam Township |
| 1935 Residence (County) | Cavalier |
| Occupation | Farm Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Income (1939) | 0 |
| Highest Grade | No 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 Andrew Olson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Andrew Olson
Son · 1940 · age 23 · b. ~1917 · North Dakota
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Sibling
Lloyd Olson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
June Olson
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alda Olson
Sibling · 1940 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helga Olson
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Hans Olson
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Henry Olson
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Verling Olson
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Oliver Olson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ole Olson
Sibling · 1940 · age 10
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 — Cavalier-County, North Dakota
Open full size
1940 US Federal Census — Cavalier-County, North Dakota
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-02998-00263)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Wife Hiley | None | F | — | — |
| 42 | Daughter Hiley | None | F | — | North Dakota |
| 43 | Dale Hiley | 0 | Son | — | — |
| 44 | William Scott | 55 | Head | Farm Laborer | North Dakota |
| 45 | Frank Campbell | 75 | Head | Farmer | Sweden |
| 46 | Sidney Lager | 45 | Head | Farmer | North Dakota |
| 47 | Elizabeth Lager | 40 | Wife | Farmer | North Dakota |
| 48 | Ila Rae M. Lager | 19 | Daughter | — | North Dakota |
| 49 | Allan L. Lager | 8 | Son | — | North Dakota |
| 50 | Donna Lee Lager | 6 | Daughter | — | North Dakota |
| 51 | Shirley M. Lager | 5 | Daughter | — | — |
| 52 | Jerry J. Lager | 3 | Son | — | — |
| 53 | Alice Lager | 0 | Daughter | — | — |
| 54 | Hazel A. Hawkins | 36 | Head | Farmer | North Dakota |
| 55 | Jane Hawkins | 19 | Daughter | — | North Dakota |
| 56 | Adelle Hawkins | 7 | Daughter | — | North Dakota |
| 57 | Olson Hawkins | 3 | Daughter | — | — |
| 58 | Ole E. M. Olson | 66 | Head | Farmer | Norway |
| 59 | Helga Olson | 48 | Wife | — | Norway |
| 60 | Andrew M. Olson THIS PERSON | 23 | Son | Farm Laborer | North Dakota |
| 61 | Henry E. Olson | 22 | Son | Farm Laborer | North Dakota |
| 62 | Oliver H. Olson | 18 | Son | Farm Laborer | North Dakota |
| 63 | Verling A. Olson | 20 | Son | Farm Laborer | North Dakota |
| 64 | Lloyd H. Olson | 16 | Son | Farm Laborer | North Dakota |
| 65 | Alda G. Olson | 14 | Daughter | — | North Dakota |
| 66 | Hans M. Olson | 12 | Son | — | North Dakota |
| 67 | Ole Vern E. Olson | 10 | Son | — | North Dakota |
| 68 | June N. Olson | 7 | Daughter | — | North Dakota |
| 69 | Helga A. Olson | 2 | Daughter | — | — |
| 70 | Earl L. Peterson | 22 | Head | Farmer | North Dakota |
| 71 | Lenora Peterson | 18 | Wife | — | North Dakota |
| 72 | Gelina Peterson | 85 | Mother | — | Norway |
| 73 | Agust Jackson | 54 | Head | Farmer | North Dakota |
| 74 | Josephine Jackson | 57 | Sister | — | North Dakota |
| 75 | Helgert Romfo | 51 | Head | Farmer | North Dakota |
| 76 | Mathilda Romfo | 53 | Wife | — | North Dakota |
| 77 | Clarence John Romfo | 19 | Son | Farming | North Dakota |
| 78 | Harvey M. Romfo | 23 | Son | Farming | North Dakota |
| 79 | Orville Romfo | 21 | Son | Farming | North Dakota |
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)