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John Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Silver-Bow-County, Montana
Our Model Tree links this John Sullivan across the 1920, 1930 and 1940 US Censuses in Silver-Bow-County, Montana (XGBoost, ~Confirmed), with identified parents Jerry & Jerry — first a son (b.~1918), then head of a 7-person household.
Age 22
b. ~1918
Male
Son
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Silver-Bow-County, Montana |
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| Additional Details | |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | Butte City |
| Est. Birth Year | ~1918 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Geraldine Sullivan | Daughter | — | 17 | ~1923 |
| Jerry Sullivan | Head | — | 45 | ~1895 |
| Richard Mcgrath | Other | — | 42 | ~1898 |
| Ida Sullivan | Son | — | 8 | ~1932 |
| Jerry Sullivan | Son | — | 13 | ~1927 |
| John Sullivan | Son | — | 22 | ~1918 |
| Rose Sullivan | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Silver Bow, …
Son, age 1
Silver Bow, Montana · implied b. ~1919 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Montana |
| Mother's Birthplace | Montana |
| Occupation | none |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Silver Bow, …
Son, age 12
Silver Bow, Montana · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | John J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Montana |
| Mother's Birthplace | Montana |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Silver-Bow-County, Montana
Son, age 22
Silver-Bow-County, Montana · implied b. ~1918 — 7 household members
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| 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 John Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Jerry Sullivan (~0.92 confidence) and father Jerry Sullivan (~0.92 confidence) and father Jerome Sullivan (~0.92 confidence) and mother Viola Sullivan (~0.92 confidence) and mother Rose Sullivan (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jerry Sullivan
b. ~1895
Source father
● Household
· direct · ~0.92
Father
Jerry Sullivan
b. ~1896
Source father
● Household
· direct · ~0.92
Father
Jerome Sullivan
b. ~1899
Source father
● Household
· direct · ~0.92
Mother
Viola Sullivan
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Rose Sullivan
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Sullivan
Son · 1940 · age 22 · b. ~1918 · Montana
★ You are viewing this record
Sibling
Ida Sullivan
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Geraldine Sullivan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerry Sullivan
Sibling · 1940 · age 13
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
39 people indexed on this census page (nara:1940:m-t0627-02230-00357)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Julia Murphy | 65 | Head | — | Ireland |
| 42 | Emmett D. Murphy | 34 | Son | Laborer | Montana |
| 43 | Agnes E. Murphy | 36 | Daughter | Teacher | Montana |
| 44 | Doris Evelyn Jorden | 39 | Head | As Clerk | Massachusetts |
| 45 | Roderick Jorden | 18 | Son | As Clerk | Montana |
| 46 | Paul Jorden | 15 | Son | — | Montana |
| 47 | Harry Jorden | 12 | Son | — | Montana |
| 48 | Leonidas Jorden | 11 | Son | — | Montana |
| 49 | Theodore Jorden | 9 | Son | — | Montana |
| 50 | Ida Marie Jorden | 7 | Daughter | — | Montana |
| 51 | Pakaneles Jorden | 5 | Son | — | Montana |
| 52 | Jerry Jorden | 3 | Daughter | — | Montana |
| 53 | John Jorden | 1 | Son | — | Montana |
| 54 | Emmett Dolan | 35 | Head | Clerk | Michigan |
| 55 | Mary Ann Dolan | 52 | Wife | Clerk | Michigan |
| 56 | Lorraine Dolan | 21 | Daughter | Stenographer | Montana |
| 57 | John Dolan | 17 | Son | — | Montana |
| 58 | John H. Gill | 68 | Head | Carpenter | Canada Eng |
| 59 | Margaret E. Gill | 55 | Wife | — | Eire |
| 60 | Joseph O. Gill | 28 | Son | Salesman | Montana |
| 61 | Dan Callahan | 39 | Head | Repairman | Massachusetts |
| 62 | Agnes Callahan | 35 | Wife | — | Montana |
| 63 | Robert Elwood | 35 | Head | Dealer | England |
| 64 | Elizabeth Elwood | 33 | Wife | — | Montana |
| 65 | Lois Elwood | 3 | Daughter | — | Montana |
| 66 | Irene Elwood | 5 | Daughter | — | Montana |
| 67 | Charles S. Jones | 45 | Boarder | Dentist | Maryland |
| 68 | Jerry G. Sullivan | 45 | Head | Storekeeper | Montana |
| 69 | Rose Sullivan | 45 | Wife | Miner | Montana |
| 70 | John Sullivan THIS PERSON | 22 | Son | — | Montana |
| 71 | Geraldine Sullivan | 17 | Daughter | — | Montana |
| 72 | Jerry G. Jr. Sullivan | 13 | Son | — | Montana |
| 73 | Ida Pat Sullivan | 8 | Son | — | Montana |
| 74 | Richard Mcgrath | 42 | Brother-in-law | Miner | Montana |
| 75 | O'Neill Morrison | 36 | Head | I.S.E. Supply Co | California |
| 76 | Mercedes Morrison | 31 | Wife | — | California |
| 77 | Lowell E. Morrison | 8 | Son | — | California |
| 78 | Raymond Collins | 41 | Head | Miner | Wisconsin |
| 79 | Sarah Collins | 41 | Wife | — | Montana |
Pedigree Summary
John + 3 siblings
Gen 1 · 5 parents
~0.92
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)