MP
Mary Peterson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-County, Minnesota
Our Model Tree links this Mary Peterson across the 1920, 1930 and 1940 US Censuses in St.-Louis-County, Minnesota (XGBoost, ~Confirmed) — first a head (b.~1888), then head of a 3-person household.
Age 52
b. ~1888
Female
Head
Born: Finland
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-County, Minnesota |
| Surname | Peterson |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Finland |
| 1935 Residence (City) | Town of Alborn / T53-R12 |
| 1935 Residence (County) | St. Louis |
| Naturalization Status | First papers filed |
| Additional Details | |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Township / Ward | Town Of Alborn T53R12 |
| Est. Birth Year | ~1888 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Peterson | Head | — | 52 | ~1888 |
| Edward Peterson | Son | — | 19 | ~1921 |
| Felix Peterson | Son | — | 25 | ~1915 |
Census Appearances
1920
St Louis, …
Other, age 32
St Louis, Minnesota · implied b. ~1888 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Mary |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Finland |
| Year of Immigration | 1917 |
| Naturalization Status | Alien |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Finnish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1930
St Louis, …
Head, age 42
St Louis, Minnesota · implied b. ~1888 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Widowed |
| Birthplace | Finland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1907 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Can Read/Write | Yes |
| Mother Tongue | Finnish |
| Home Owned/Rented | O |
| Home Value / Rent | $300 |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
St.-Louis-County, Minnesota
Head, age 52
St.-Louis-County, Minnesota · implied b. ~1888 — 3 household members
| Surname | Peterson |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Finland |
| 1935 Residence (City) | Town of Alborn / T53-R12 |
| 1935 Residence (County) | St. Louis |
| Naturalization Status | First papers filed |
| Highest Grade | No 0 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Peterson
Head · 1940 · age 52 · b. ~1888 · Minnesota
★ 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 — St.-Louis-County, Minnesota
Open full size
1940 US Federal Census — St.-Louis-County, Minnesota
Page Contents
36 people indexed on this census page (nara:1940:m-t0627-01955-00032)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank Laine | 54 | Head | Operator | Finland |
| 2 | Jack A. Luukkonen | 65 | Head | Operator | Finland |
| 3 | Sofia T. Luukkonen | 53 | Wife | — | Finland |
| 4 | Leo T. Long | 23 | Step-son | Piecemaker | Minn |
| 5 | John W. Long | 15 | Step-son | — | Minn |
| 6 | John B. Mikkonen | 55 | Head | Operator | Finland |
| 7 | Mary F. Mikkonen | 51 | Wife | — | Finland |
| 8 | Jacob John Aho | 64 | Head | — | Finland |
| 9 | Peter Yohaminen | 49 | Head | Operator | Finland |
| 10 | Lizzy Yohaminen | 52 | Wife | — | Finland |
| 11 | Arne J. Yohaminen | 17 | Son | Farm Helper | Minn |
| 12 | Peter Huotari | 59 | Head | Operator | Finland |
| 13 | Josephine Huotari | 54 | Wife | — | Finland |
| 14 | Wesley D. Laine | 27 | Head | Milk Truck Driver | Minn |
| 15 | Lillian Laine | 27 | Wife | — | Minn |
| 16 | Richard H. Laine | 7 | Son | — | Minn |
| 17 | Matilda Jensen | 76 | Head | — | Finland |
| 18 | August C. Brolin | 65 | Lodger | Manager | Sweden |
| 19 | Charles W. Maki | 55 | Head | Operator | Finland |
| 20 | Eli Heil | 59 | Head | Operator | Finland |
| 21 | Minnie Heil | 48 | Wife | — | Finland |
| 22 | Eugene Heil | 18 | Son | — | Minn |
| 23 | Urho M. Hietala | 43 | Head | Operator | Finland |
| 24 | Aune M. Hietala | 45 | Wife | — | Finland |
| 25 | Mary Peterson THIS PERSON | 52 | Head | — | Finland |
| 26 | Felix J. Peterson | 25 | Son | Operator | Finland |
| 27 | Edward H. Peterson | 19 | Son | Farm Hand | Minn |
| 28 | Kalle Kilpela | 56 | Head | — | Finland |
| 29 | Gust Lindquist | 70 | Head | — | Finland |
| 30 | Herman Kallio | 55 | Head | Operator | Finland |
| 31 | Sofie Johnson | 52 | Head | Operator | Finland |
| 32 | Kenneth A. Johnson | 29 | Son | Farm Hand | Minn |
| 33 | Hjalmer Uotila | 57 | Lodger | — | Finland |
| 34 | John J. Elmoro | 52 | Head | Operator | Finland |
| 35 | Ida J. Elmoro | 53 | Wife | — | Finland |
| 36 | Lauri Kuuri | 48 | Hired Hand | Piecemaker | Finland |
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)