MF
Mary Finn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Powell-County, Montana
Our Model Tree links this Mary Finn across the 1920, 1930 and 1940 US Censuses in Powell-County, Montana (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 4-person household.
Age 49
b. ~1891
Female
Spouse
Born: Montana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Powell-County, Montana |
| Surname | Finn |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Cottonwood Township |
| 1935 Residence (County) | Powell |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | Cottonwood Township |
| Est. Birth Year | ~1891 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Finn | Daughter | — | 11 | ~1929 |
| John Finn | Head | — | 50 | ~1890 |
| Donna Finn | Daughter | — | 9 | ~1931 |
| Mary Finn | Spouse | — | 49 | ~1891 |
Census Appearances
1920
Powell, Montana
Spouse, age 30
Powell, Montana · implied b. ~1890 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finn |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Montana |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Powell, Montana
Spouse, age 40
Powell, Montana · implied b. ~1890 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Finn |
| Given Name | Mary J. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Montana |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Powell-County, Montana
Spouse, age 49
Powell-County, Montana · implied b. ~1891 — 4 household members
| Surname | Finn |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Montana |
| 1935 Residence (City) | Cottonwood Township |
| 1935 Residence (County) | Powell |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Finn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Finn
Spouse · 1940 · age 49 · b. ~1891 · Montana
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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 — Powell-County, Montana
Open full size
1940 US Federal Census — Powell-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02227-00530)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | William E. Thompson | 50 | Head | Ranch Foreman | Michigan |
| 2 | Margaret A. Thompson | 42 | Wife | — | Michigan |
| 3 | James F. Thompson | 14 | Son | — | Montana |
| 4 | Betty J. Thompson | 12 | Daughter | — | Montana |
| 5 | William E. Jr. Thompson | 9 | Son | — | Montana |
| 6 | John A. Thompson | 7 | Son | — | Montana |
| 7 | Dorothy Ann Thompson | 5 | Daughter | — | Montana |
| 8 | Kenneth D. Kolbo | 26 | Head | Storekeeper | Montana |
| 9 | Mary H. Kolbo | 24 | Wife | — | Montana |
| 10 | Joe D. Murnaghan | 51 | Head | Captain Of Guard | North Ireland |
| 11 | Agnes Murnaghan | 48 | Wife | — | Minnesota |
| 12 | Harvey D. Sparks | 64 | Head | Guard | Illinois |
| 13 | Pearl Sparks | 59 | Wife | — | South Dakota |
| 14 | Thomas F. Hill | 64 | Head | Guard | Kansas |
| 15 | Lora M. Hill | 63 | Wife | Matron | Missouri |
| 16 | Bernard J. Kuhl | 45 | Head | Clerk | Minnesota |
| 17 | Otilia Kuhl | 46 | Wife | — | Minnesota |
| 18 | Mary Lucy Kuhl | 16 | Daughter | — | Montana |
| 19 | Arthur Kuhl | 15 | Son | — | Minnesota |
| 20 | Richard Kuhl | 13 | Son | — | Montana |
| 21 | Frances Kuhl | 11 | Daughter | — | Montana |
| 22 | James Kuhl | 9 | Son | — | Montana |
| 23 | James Kuhl | 6 | Son | — | Montana |
| 24 | C. J. Flynn | 24 | Head | Guard | Montana |
| 25 | Catherine M. Flynn | 23 | Wife | — | Montana |
| 26 | James William Flynn | 1 | Son | — | Montana |
| 27 | A. M. Christensen | 52 | Head | Guard | Norway |
| 28 | John A. Finn | 50 | Head | Guard | Montana |
| 29 | Mary L. Finn THIS PERSON | 49 | Wife | — | Montana |
| 30 | Mary Finn | 11 | Daughter | — | Montana |
| 31 | Donna Finn | 9 | Daughter | — | Montana |
| 32 | W. E. Perkins | 57 | Head | Farmer | Montana |
| 33 | Nellie R. Perkins | 49 | Wife | — | Montana |
| 34 | Eva M. Perkins | 19 | Daughter | New Worker | Montana |
| 35 | Melvin E. Mezner | 25 | Head | Laborer | Montana |
| 36 | Margaret K. Mezner | 23 | Wife | — | South Dakota |
| 37 | Evelyn Mezner | 2 | Daughter | — | Montana |
| 38 | Carl Illner | 63 | Head | Machinist | Austria |
| 39 | Mary Illner | 61 | Wife | — | Germany |
| 40 | Joseph F. Thelhei | 56 | Head | Farmer | Iowa |
Related Census Records
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)