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Mary Leary — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Silver-Bow-County, Montana
Our Model Tree links this Mary Leary across the 1930 and 1940 US Censuses in Silver-Bow-County, Montana (XGBoost, ~Confirmed) — first a daughter (b.~1904), then head of a 5-person household.
Age 36
b. ~1904
Female
Daughter
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Silver-Bow-County, Montana |
| Surname | Leary |
| Given Name | Mary Agnes |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte |
| 1935 Residence (County) | Silver Bow |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Anaconda Copper Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Stenographer |
| Township / Ward | Butte |
| Est. Birth Year | ~1904 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Helen Leary | Daughter | — | 23 | ~1917 |
| John Leary | Son | — | 21 | ~1919 |
| Ellen Leary | Head | — | 55 | ~1885 |
| Ruth Leary | Daughter | — | 30 | ~1910 |
| Mary Leary | Daughter | — | 36 | ~1904 |
Census Appearances
1930
Silver Bow, …
Spouse, age 24
Silver Bow, Montana · implied b. ~1906 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Leary |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Montana |
| Age at First Marriage | 21 |
| Father's Birthplace | Yugoslavia |
| Mother's Birthplace | Yugoslavia |
| Occupation | Stenographer |
| Industry | Tire Co. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Silver-Bow-County, Montana
Daughter, age 36
Silver-Bow-County, Montana · implied b. ~1904 — 5 household members
| Surname | Leary |
| Given Name | Mary Agnes |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 36 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte |
| 1935 Residence (County) | Silver Bow |
| Occupation | Stenographer |
| Industry | Anaconda Copper Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | H 4 |
| 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 Leary across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Leary
Daughter · 1940 · age 36 · b. ~1904 · Montana
★ You are viewing this record
Sibling
Ruth Leary
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Leary
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Leary
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Silver-Bow-County, Montana
Open full size
1940 US Federal Census — Silver-Bow-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02230-00561)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Clifford Harris | 23 | Son | Miner | Idaho |
| 2 | Dorothy Harris | 13 | Daughter | — | Montana |
| 3 | Albert Harris | 9 | Son | — | Montana |
| 4 | Philip Harris | 1 | Son | — | Montana |
| 5 | Lloyd Daley | 29 | Head | Miner | Oklahoma |
| 6 | Mabel Daley | 30 | Wife | — | Mississippi |
| 7 | Ilene Lavonne Daley | 11 | Daughter | — | Montana |
| 8 | Glenn Daley | 8 | Son | — | Montana |
| 9 | Vivian Daley | 6 | Daughter | — | Montana |
| 10 | Mary Ranney | 54 | Lodger | — | Kansas |
| 11 | Ben A. Ranney | 28 | Son | Truck Driver | Kansas |
| 12 | Julia Sullivan | 58 | Head | — | Ireland |
| 13 | Margaret Sullivan | 27 | Daughter | Art Teacher | Montana |
| 14 | Elinore Sullivan | 16 | Daughter | — | Montana |
| 15 | George Jeffery | 47 | Head | Motor Man | Colorado |
| 16 | Eunice Jeffery | 37 | Wife | — | Michigan |
| 17 | William Jeffery | 22 | Son | Motor Man | Michigan |
| 18 | Mabel Jeffery | 20 | Daughter | Waitress | Michigan |
| 19 | Jack Jeffery | 18 | Son | New Worker | Michigan |
| 20 | Genevive Jeffery | 16 | Daughter | — | Michigan |
| 21 | Robert Jeffery | 15 | Son | — | Michigan |
| 22 | Eva Jeffery | 14 | Daughter | — | Michigan |
| 23 | Clyde Jeffery | 11 | Son | — | Montana |
| 24 | Lorraine Jeffery | 10 | Daughter | — | Montana |
| 25 | Donald Jeffery | 9 | Son | — | Montana |
| 26 | Mary Jeffery | 8 | Daughter | — | Montana |
| 27 | Jane Jeffery | 3 | Daughter | — | Montana |
| 28 | Michael Dwyer | 46 | Head | Draftsman | Montana |
| 29 | Annette Dwyer | 27 | Wife | — | Maine |
| 30 | Annette Dwyer | 6 | Daughter | — | Montana |
| 31 | Elise Dwyer | 5 | Daughter | — | Montana |
| 32 | Diane Dwyer | 2 | Daughter | — | Montana |
| 33 | Ellen Leary | 55 | Head | — | Ireland |
| 34 | Mary Agnes Leary THIS PERSON | 36 | Daughter | Stenographer | Montana |
| 35 | Ruth Leary | 30 | Daughter | Machinist | Montana |
| 36 | Helen Leary | 23 | Daughter | File Clerk | Montana |
| 37 | John Leary | 21 | Son | — | Montana |
| 38 | Gertrude Morgan | 29 | Head | Stenographer | Idaho |
| 39 | Beverly Blakeman | 11 | Daughter | — | California |
| 40 | Curtis Blakeman | 9 | Son | — | California |
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)