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John Olson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Clark-County, Wisconsin
Our Model Tree links this John Olson across the 1920, 1930 and 1940 US Censuses in Clark-County, Wisconsin (XGBoost, ~Confirmed) — first a head (b.~1890), then head of a 3-person household.
Age 50
b. ~1890
Male
Head
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Clark-County, Wisconsin |
| Surname | Olson |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Town of Loyal |
| 1935 Residence (County) | Clark |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 84 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Occupation | Farmer |
| Township / Ward | Town Of Loyal |
| Est. Birth Year | ~1890 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Olson | Head | — | 50 | ~1890 |
| Leonard Olson | Son | — | 18 | ~1922 |
| Margaret Olson | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Clark, Wisconsin
Head, age 30
Clark, Wisconsin · implied b. ~1890 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Home Owned/Rented | R |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1930
Clark, Wisconsin
Head, age 40
Clark, Wisconsin · implied b. ~1890 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 23 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Farmer |
| Industry | Agriculture |
| Class of Worker | VVVV O |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Clark-County, Wisconsin
Head, age 50
Clark-County, Wisconsin · implied b. ~1890 — 3 household members
| Surname | Olson |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Town of Loyal |
| 1935 Residence (County) | Clark |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 84 |
| Income (1939) | 0 |
| Highest Grade | No 6 |
| 1935 Residence | Same place |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
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 John Olson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Olson
Head · 1940 · age 50 · b. ~1890 · Wisconsin
★ 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 — Clark-County, Wisconsin
Open full size
1940 US Federal Census — Clark-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04465-00421)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Viola Froeba | 7 | Daughter | — | Wisconsin |
| 42 | Catherine Froeba | 5 | Daughter | — | Wisconsin |
| 43 | Raymond Froeba | 4 | Son | — | Wisconsin |
| 44 | Ronald Froeba | 1 | Son | — | Wisconsin |
| 45 | John H. Olson THIS PERSON | 50 | Head | Farmer | Wisconsin |
| 46 | Margaret O. Olson | 47 | Wife | — | Wisconsin |
| 47 | Leonard Olson | 18 | Son | Farm Laborer | Wisconsin |
| 48 | Jacob A. Attwell | 56 | Head | Farmer | Switzerland |
| 49 | Marie Attwell | 57 | Wife | — | France |
| 50 | Fred Attwell | 33 | Son | Farm Laborer | Wisconsin |
| 51 | Bert E. Young | 63 | Head | Farmer | Wisconsin |
| 52 | Cecelia A. Young | 45 | Wife | — | Wisconsin |
| 53 | Luella Young | 21 | Daughter | Salesman | Wisconsin |
| 54 | Hazel Young | 17 | Daughter | — | Wisconsin |
| 55 | Norma Young | 15 | Daughter | — | Wisconsin |
| 56 | Calvin Young | 12 | Son | — | Wisconsin |
| 57 | Roland Baur | 41 | Head | Farmer | Wisconsin |
| 58 | Beatrice A. Baur | 36 | Wife | — | Wisconsin |
| 59 | Virginia Baur | 15 | Daughter | — | Wisconsin |
| 60 | Wallace Baur | 12 | Son | — | Wisconsin |
| 61 | Arlene Baur | 10 | Daughter | — | Wisconsin |
| 62 | Alberta May Baur | 9 | Daughter | — | Wisconsin |
| 63 | Kenneth Baur | 7 | Son | — | Wisconsin |
| 64 | Sylvester Baur | 3 | Son | — | Wisconsin |
| 65 | Ira C. Clover | 52 | Head | Farmer | Wisconsin |
| 66 | Jennie A. Clover | 50 | Wife | — | Wisconsin |
| 67 | Bernard Clover | 18 | Son | Farm Laborer | Wisconsin |
| 68 | Lynn Clover | 14 | Son | — | Wisconsin |
| 69 | Mary Jane Clover | 11 | Daughter | — | Wisconsin |
| 70 | Alfred O. Degenhardt | 24 | Head | Farmer | Wisconsin |
| 71 | Lorraine Degenhardt | 25 | Wife | — | Wisconsin |
| 72 | Marlene Degenhardt | 4 | Daughter | — | Wisconsin |
| 73 | Katherine Degenhardt | 59 | Mother | — | Wisconsin |
| 74 | George A. Burdick | 47 | Head | Farmer | South Dakota |
| 75 | Hannah Burdick | 35 | Wife | — | South Dakota |
| 76 | Marguerite Burdick | 10 | Daughter | — | South Dakota |
| 77 | Billings Burdick | 5 | Son | — | South Dakota |
| 78 | William D. Beaver | 53 | Head | Farmer | Wisconsin |
| 79 | Clara Beaver | 50 | Wife | — | Wisconsin |
| 80 | Jeanette Beaver | 14 | Daughter | — | Wisconsin |
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)