MS
Mary Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Silver-Bow-County, Montana
Our Model Tree links this Mary Sullivan across the 1920, 1930 and 1940 US Censuses in Silver-Bow-County, Montana (XGBoost, ~Confirmed), with identified parents Marie & Marie — first a daughter (b.~1898), then head of a 4-person household.
Age 42
b. ~1898
Female
Daughter
Born: Utah
Divorced
1940 Census Record Details
| Census Year | 1940 |
| Location | Silver-Bow-County, Montana |
| Surname | Sullivan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Divorced |
| Birthplace | Utah |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| Additional Details | |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Township / Ward | Butte City |
| Est. Birth Year | ~1898 |
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 Sullivan | Daughter | — | 42 | ~1898 |
| Kathleen Sullivan | Daughter | — | 32 | ~1908 |
| Maine Sullivan | Head | — | 67 | ~1873 |
| Sylvester Sullivan | Son | — | 33 | ~1907 |
Census Appearances
1920
Silver Bow, …
Daughter, age 21
Silver Bow, Montana · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | California |
| Mother's Birthplace | Utah |
| Occupation | Bookkeeper |
| Industry | Laundry |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1930
Silver Bow, …
Daughter, age 32
Silver Bow, Montana · implied b. ~1898 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | Utah |
| Age at First Marriage | 22 |
| Father's Birthplace | California |
| Mother's Birthplace | Utah |
| Can Read/Write | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Silver-Bow-County, Montana
Daughter, age 42
Silver-Bow-County, Montana · implied b. ~1898 — 4 household members
| Surname | Sullivan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Divorced |
| Birthplace | Utah |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
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 Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Marie Sullivan (~0.50 confidence) and mother Marie Sullivan (~0.92 confidence) and mother Maine Sullivan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.78
Mother
Marie Sullivan
b. ~1898
Source mother
● Household
· direct · ~0.5
Mother
Marie Sullivan
b. ~1876
Source mother
● Household
· direct · ~0.92
Mother
Maine Sullivan
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Sullivan
Daughter · 1940 · age 42 · b. ~1898 · Montana
★ You are viewing this record
Sibling
Sylvester Sullivan
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kathleen Sullivan
Sibling · 1940 · age 32
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-t0627-02230-00816)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | E. Leo Foley | 38 | Head | Asst Supt | Montana |
| 2 | Margaret Foley | 37 | Wife | — | Montana |
| 3 | Betty Lee Foley | 14 | Daughter | — | Montana |
| 4 | E. Leo Jr Foley | 10 | Son | — | Montana |
| 5 | Kathleen Foley | 7 | Daughter | — | Montana |
| 6 | Peggy Jean Foley | 5 | Daughter | — | Montana |
| 7 | Mary Mcleod | 48 | Head | Bookkeeper | Montana |
| 8 | Francis Kelly | 40 | Brother | — | Montana |
| 9 | Cornelius Kelly | 39 | Brother | Clerk | Montana |
| 10 | Thomas Mcleod | 21 | Nephew | — | Montana |
| 11 | Joseph Kelly | 53 | Head | Shift Boss | Montana |
| 12 | Oliver Hamilton | 41 | Head | Truck Driver | Montana |
| 13 | Marie Hamilton | 41 | Wife | — | Montana |
| 14 | Clarence Oulette | 27 | Head | Miner | Montana |
| 15 | Elizabeth Oulette | 27 | Wife | — | Montana |
| 16 | Phyllis Oulette | 4 | Daughter | — | Montana |
| 17 | Gerry Brooking | 9 | Son of Head | — | Montana |
| 18 | Robert Brooking | 4 | Son of Head | — | Montana |
| 19 | Mae Kilmartin | 45 | Mother-in-law | — | Kansas |
| 20 | Frank G (Ab) Kilmartin | 54 | Brother-in-law | — | Illinois |
| 21 | William Hayes | 63 | Head | Miner | Illinois |
| 22 | Ida May Hayes | 52 | Wife | — | Kansas |
| 23 | John P Carney | 44 | Head | Bartender | Montana |
| 24 | Alma E Carney | 38 | Wife | — | Colorado |
| 25 | Mary T Darrow | 67 | Head | — | Minnesota |
| 26 | William A Bartlett | 64 | Head | Economic Survey | Illinois |
| 27 | Frona Bartlett | 61 | Wife | — | Illinois |
| 28 | Mable Murphy | 50 | Head | Sewing Room | Iowa |
| 29 | Daniel Loughland | 54 | Head | — | England |
| 30 | Catherine Loughland | 46 | Wife | — | Montana |
| 31 | Gladys Loughland | 18 | Daughter | File Clerk | Montana |
| 32 | Mary Corr | 52 | Head | Housekeeper | Michigan |
| 33 | Edward Corr | 19 | Son | Mineral Miner | Montana |
| 34 | Frank Corr | 24 | Son | Student | Montana |
| 35 | John Corr | 21 | Son | Mineral Miner | Montana |
| 36 | Kathleen Corr | 13 | Daughter | — | Montana |
| 37 | Maine Sullivan | 67 | Head | — | Utah |
| 38 | Mary Sullivan THIS PERSON | 42 | Daughter | — | Utah |
| 39 | Sylvester Sullivan | 33 | Son | Clerk | Montana |
| 40 | Kathleen Sullivan | 32 | Daughter | Ticket Agent | Montana |
Pedigree Summary
Mary + 2 siblings
Gen 1 · 3 parents
~0.78
Max depth 4 (1900–1950 window)
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)