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Robert Olson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Walsh-County, North Dakota
Our Model Tree links this Robert Olson across the 1930 and 1940 US Censuses in Walsh-County, North Dakota (XGBoost, ~Confirmed) — first a son (b.~1926), then head of a 8-person household.
Age 14
b. ~1926
Male
Son
Born: North Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Walsh-County, North Dakota |
| Surname | Olson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Grafton city |
| 1935 Residence (County) | Walsh |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Township / Ward | Grafton City |
| Est. Birth Year | ~1926 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Oscar Olson | Head | — | 41 | ~1899 |
| Elaine Olson | Daughter | — | 18 | ~1922 |
| Lucille Olson | Daughter | — | 11 | ~1929 |
| June Olson | Daughter | — | 16 | ~1924 |
| Hulda Olson | Spouse | — | 37 | ~1903 |
| Robert Olson | Son | — | 14 | ~1926 |
| Helen Olson | Daughter | — | 9 | ~1931 |
| Richard Olson | Son | — | 5 | ~1935 |
Census Appearances
1930
Walsh, North …
Son, age 5
Walsh, North Dakota · implied b. ~1925 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Robert G. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | North Dakota |
| Mother's Birthplace | North Dakota |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1940
Walsh-County, North …
Son, age 14
Walsh-County, North Dakota · implied b. ~1926 — 8 household members
| Surname | Olson |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | North Dakota |
| 1935 Residence (City) | Grafton city |
| 1935 Residence (County) | Walsh |
| Industry | 0 |
| Highest Grade | No 6 |
| 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 Robert Olson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Robert Olson
Son · 1940 · age 14 · b. ~1926 · North Dakota
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Sibling
Helen Olson
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
June Olson
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elaine Olson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Olson
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Richard Olson
Sibling · 1940 · age 5
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 — Walsh-County, North Dakota
Open full size
1940 US Federal Census — Walsh-County, North Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03016-00646)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Annally Dufault | 6 | Daughter | — | North Dakota |
| 42 | Darlene Dufault | 5 | Daughter | — | North Dakota |
| 43 | Henry C. Iverson | 56 | Head | Proprietor | North Dakota |
| 44 | Carrie Iverson | 57 | Wife | — | Norway |
| 45 | Adrian T. Iverson | 33 | Son | — | North Dakota |
| 46 | Lloyd Iverson | 22 | Son | — | North Dakota |
| 47 | Julius Helliken | 57 | Head | Section Foreman | Norway |
| 48 | Barbara Helliken | 62 | Wife | — | North Dakota |
| 49 | Olaf Helliken | 30 | Son | Truck Driver | North Dakota |
| 50 | Juline Helliken | 25 | Son | Section Laborer | North Dakota |
| 51 | Margaret Helliken | 19 | Daughter | Maid | North Dakota |
| 52 | Oscar B. Olson | 41 | Head | Coal Dock Foreman | North Dakota |
| 53 | Hulda Olson | 37 | Wife | — | North Dakota |
| 54 | Elaine Olson | 18 | Daughter | Stenographer | North Dakota |
| 55 | June Olson | 16 | Daughter | New Worker | North Dakota |
| 56 | Robert Olson THIS PERSON | 14 | Son | — | North Dakota |
| 57 | Lucille Olson | 11 | Daughter | — | North Dakota |
| 58 | Helen Olson | 9 | Daughter | — | North Dakota |
| 59 | Richard Olson | 5 | Son | — | North Dakota |
| 60 | William M. Bormesen | 39 | Head | Machine Operator Section Laborer | Minnesota |
| 61 | Ella Bormesen | 33 | Wife | — | North Dakota |
| 62 | William H. Bormesen | 8 | Son | — | North Dakota |
| 63 | Ellis Bormesen | 5 | Son | — | North Dakota |
| 64 | John C. Ritchie | 52 | Head | Warehouse | Virginia |
| 65 | Charlotte Ritchie | 37 | Wife | — | Minnesota |
| 66 | Marjorie Ritchie | 12 | Daughter | — | Minnesota |
| 67 | Charlene Ritchie | 9 | Daughter | — | North Dakota |
| 68 | Clinton Ritchie | 1 | Son | — | North Dakota |
| 69 | Darlys Ritchie | 0 | Daughter | — | North Dakota |
| 70 | Tena Ruud | 54 | Head | Seamstress | North Dakota |
| 71 | Gunder Ruud | 29 | Son | Laborer | North Dakota |
| 72 | Joseph Ruud | 19 | Son | Laborer | North Dakota |
| 73 | Agnetta Ruud | 16 | Daughter | Maid | North Dakota |
| 74 | Orville Ruud | 8 | Son | — | North Dakota |
| 75 | Christ Ruud | 22 | Son | Section Laborer | North Dakota |
| 76 | Ethel Ruud | 24 | Daughter-in-law | Cook | North Dakota |
| 77 | Lawrence Jackson | 30 | Head | Carpenter | North Dakota |
| 78 | Edna Jackson | 24 | Wife | — | North Dakota |
| 79 | Peter T. Samson | 59 | Head | Laborer | Canada French |
| 80 | Emma Samson | 56 | Wife | — | 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)