MO
Mary Olson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marinette-County, Wisconsin
Our Model Tree links this Mary Olson across the 1930 and 1940 US Censuses in Marinette-County, Wisconsin (XGBoost, ~Confirmed) — first a spouse (b.~1901), then head of a 11-person household.
Age 39
b. ~1901
Female
Spouse
Born: Wisconsin
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marinette-County, Wisconsin |
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Marinette |
| 1935 Residence (County) | Marinette |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
| Township / Ward | Marinette |
| Est. Birth Year | ~1901 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Olson | Spouse | — | 39 | ~1901 |
| Sandra Olson | Daughter | — | 1 | ~1939 |
| Donald Olson | Son | — | 9 | ~1931 |
| Eugene Olson | Son | — | 2 | ~1938 |
| Douglas Olson | Son | — | 9 | ~1931 |
| Jeanette Olson | Daughter | — | 10 | ~1930 |
| Arthur Olson | Head | — | 47 | ~1893 |
| Marion Olson | Daughter | — | 17 | ~1923 |
| Warren Olson | Son | — | 13 | ~1927 |
| James Olson | Son | — | 20 | ~1920 |
| Joanne Olson | Daughter | — | 4 | ~1936 |
Census Appearances
1930
Marinette, Wisconsin
Spouse, age 28
Marinette, Wisconsin · implied b. ~1902 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| Age at First Marriage | 20 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Canada-Eng |
| Can Read/Write | Yes |
| Birth State | Wisconsin |
| Birth Country | United States |
| Birthplace (normalized) | wisconsin |
1940
Marinette-County, Wisconsin
Spouse, age 39
Marinette-County, Wisconsin · implied b. ~1901 — 11 household members
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Married |
| Birthplace | Wisconsin |
| 1935 Residence (City) | Marinette |
| 1935 Residence (County) | Marinette |
| Income (1939) | 0 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| 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 Mary Olson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Olson
Spouse · 1940 · age 39 · b. ~1901 · Wisconsin
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Marinette-County, Wisconsin
Open full size
1940 US Federal Census — Marinette-County, Wisconsin
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04498-00247)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frances Stauden | 37 | Wife | — | Wisconsin |
| 42 | A. John Larson | 59 | Head | — | Sweden |
| 43 | Axel Larson | 53 | Brother | — | Michigan |
| 44 | Lena Johnson | 60 | Servant | House Keeper | Sweden |
| 45 | E. John Nelson | 44 | Head | Carpenter | Sweden |
| 46 | Marty Nelson | 56 | Wife | — | Wisconsin |
| 47 | Helen Nelson | 24 | Daughter | Stenographer | Wisconsin |
| 48 | Donald Alfredson | 24 | Lodger | Beater Work | Michigan |
| 49 | Adolph Peterson | 64 | Head | Fireman | Sweden |
| 50 | Margaret Peterson | 54 | Wife | — | Wisconsin |
| 51 | Lloyd Peterson | 32 | Son | Shipping Clerk | Wisconsin |
| 52 | Francis Peterson | 22 | Son | Fisherman | Wisconsin |
| 53 | Edwin Peterson | 20 | Son | Odd Jobs | Michigan |
| 54 | Walter Peterson | 17 | Son | — | Wisconsin |
| 55 | Arthur Olson | 47 | Head | Fisherman | Wisconsin |
| 56 | Mary Olson THIS PERSON | 39 | Wife | — | Wisconsin |
| 57 | James Olson | 20 | Son | Fisherman | Michigan |
| 58 | Eugene Olson | 2 | Son | — | Wisconsin |
| 59 | Marion Olson | 17 | Daughter | — | Wisconsin |
| 60 | Warren Olson | 13 | Son | — | Wisconsin |
| 61 | Jeanette Olson | 10 | Daughter | — | Wisconsin |
| 62 | Donald Olson | 9 | Son | — | Wisconsin |
| 63 | Douglas Olson | 9 | Son | — | Wisconsin |
| 64 | Joanne Olson | 4 | Daughter | — | Wisconsin |
| 65 | Sandra Olson | 1 | Daughter | — | Wisconsin |
| 66 | Sister Fisher | 28 | Head | Fish Dealer | Illinois |
| 67 | Kathleen Fisher | 29 | Wife | — | Wisconsin |
| 68 | Johnnie Fisher | 2 | Daughter | — | Wisconsin |
| 69 | Kate Salta | 69 | Mother-in-law | — | Wisconsin |
| 70 | Louis Healy | 30 | Head | Wood Room | Michigan |
| 71 | Catherine Healy | 27 | Wife | — | Wisconsin |
| 72 | Ronald Healy | 4 | Son | — | Michigan |
| 73 | Carol Healy | 2 | Daughter | — | Michigan |
| 74 | E. Jensina Brink | 70 | Head | — | Denmark |
| 75 | Roy Erickson | 40 | Head | Janitor | Wisconsin |
| 76 | Sigrid Erickson | 39 | Wife | — | Michigan |
| 77 | Eileen Erickson | 18 | Daughter | New Worker | Wisconsin |
| 78 | Charles Erickson | 74 | Father | Truck Driver | Norway |
| 79 | Albert Gamblin | 52 | Head | Labor | Wisconsin |
| 80 | Emma Gamblin | 53 | Wife | — | 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)