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Mary Olson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Minnesota
Our Model Tree links this Mary Olson across the 1930 and 1940 US Censuses in Cook-County, Minnesota (XGBoost, ~Confirmed) — first a spouse (b.~1912), then head of a 7-person household.
Age 28
b. ~1912
Female
Spouse
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Minnesota |
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | T 143 N R 25 W |
| 1935 Residence (County) | Cass |
| Additional Details | |
| Industry | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | T 143 N R 25 W |
| Est. Birth Year | ~1912 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lillian Olson | Daughter | — | 9 | ~1931 |
| Fred Olson | Son | — | 4 | ~1936 |
| Irene Olson | Daughter | — | 7 | ~1933 |
| Mary Olson | Spouse | — | 28 | ~1912 |
| Edward Olson | Son | — | 10 | ~1930 |
| Elsie Olson | Daughter | — | 11 | ~1929 |
| Albert Olson | Head | — | 58 | ~1882 |
Census Appearances
1930
Cook, Minnesota
Other, age 19
Cook, Minnesota · implied b. ~1911 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | American Indian |
| Age | 19 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Age at First Marriage | 17 |
| Father's Birthplace | Mixed Blood |
| Mother's Birthplace | Chippewa |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Cook-County, Minnesota
Spouse, age 28
Cook-County, Minnesota · implied b. ~1912 — 7 household members
| Surname | Olson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | T 143 N R 25 W |
| 1935 Residence (County) | Cass |
| Industry | 0 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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.
Show:
This person
Anchor record
Mary Olson
Spouse · 1940 · age 28 · b. ~1912 · Minnesota
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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 — Cook-County, Minnesota
Open full size
1940 US Federal Census — Cook-County, Minnesota
Page Contents
17 people indexed on this census page (nara:1940:m-t0627-01915-00089)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ina S Fortit | 43 | Wife | — | Minnesota |
| 2 | Jewell Fortit | 18 | daughter | — | Minnesota |
| 3 | Daren Fortit | 17 | son | — | Minnesota |
| 4 | Herbert Fortit | 15 | son | — | Minnesota |
| 5 | Darla Fortit | 13 | daughter | — | Minnesota |
| 6 | Arleigh Fortit | 11 | son | — | Minnesota |
| 7 | Marlene Fortit | 4 | daughter | — | Minnesota |
| 8 | Malcolm Tunnell | 51 | Head | Cook | Wisconsin |
| 9 | Maude Tunnell | 48 | Wife | — | Iowa |
| 10 | Iris Tunnell | 11 | niece | — | Minnesota |
| 11 | Albert O Olson | 58 | Head | Chauffeur | Sweden |
| 12 | Mary Olson THIS PERSON | 28 | Wife | — | Minnesota |
| 13 | Elsie Olson | 11 | daughter | — | Minnesota |
| 14 | Edward Olson | 10 | son | — | Minnesota |
| 15 | Lillian Olson | 9 | daughter | — | Minnesota |
| 16 | Irene Olson | 7 | daughter | — | Minnesota |
| 17 | Fred Olson | 4 | son | — | Minnesota |
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)