MS
Margaret Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Silver-Bow-County, Montana
Our Model Tree links this Margaret Sullivan across the 1920, 1930 and 1940 US Censuses in Silver-Bow-County, Montana (XGBoost, ~Confirmed), with identified parents Mike & Mary — first a daughter (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Female
Daughter
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Silver-Bow-County, Montana |
| Surname | Sullivan |
| Given Name | Margaret K |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Power & Gas Co |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Stenographer |
| Township / Ward | Butte City |
| Est. Birth Year | ~1913 |
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 Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Sullivan | Daughter | — | 27 | ~1913 |
| Mary Sullivan | Head | — | 52 | ~1888 |
| Douglas Sullivan | Son | — | 23 | ~1917 |
Census Appearances
1920
Silver Bow, …
Daughter, age 7
Silver Bow, Montana · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Silver Bow, …
Daughter, age 17
Silver Bow, Montana · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Michigan |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Silver-Bow-County, Montana
Daughter, age 27
Silver-Bow-County, Montana · implied b. ~1913 — 3 household members
| Surname | Sullivan |
| Given Name | Margaret K |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| Occupation | Stenographer |
| Industry | Power & Gas Co |
| Class of Worker | PW |
| Hours Worked | 38 |
| Income (1939) | 1200 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 Margaret Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Mike Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Mike Sullivan
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Sullivan
Daughter · 1940 · age 27 · b. ~1913 · Montana
★ You are viewing this record
Sibling
Douglas Sullivan
Sibling · 1940 · age 23
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-t0627-02230-00261)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Alice A Franklin | 30 | Wife | — | Montana |
| 42 | Edgar Franklin | 12 | Son | — | Montana |
| 43 | Mary Franklin | 10 | Daughter | — | Montana |
| 44 | William Franklin | 6 | Son | — | Montana |
| 45 | Patricia Franklin | 3 | Daughter | — | Montana |
| 46 | Marie Franklin | 2 | Daughter | — | Montana |
| 47 | Mary E Sullivan | 52 | Head | — | Michigan |
| 48 | Margaret K Sullivan THIS PERSON | 27 | Daughter | Stenographer | Montana |
| 49 | Douglas D Sullivan | 23 | Son | Stenographer | Montana |
| 50 | Elizabeth J Kitts | 75 | Head | — | England |
| 51 | Raymond A Burbank | 22 | Head | Metal Miner | Montana |
| 52 | Elinor H Burbank | 17 | Wife | — | Montana |
| 53 | Raylene M Burbank | 1 | Daughter | — | Montana |
| 54 | Hellan Kingston | 29 | Head | Bartender | Montana |
| 55 | Vina M Kingston | 20 | Wife | — | Idaho |
| 56 | William J Kingston | 0 | Son | — | Montana |
| 57 | John D Harrington | 57 | Head | — | Irish Free St |
| 58 | Loretta Harrington | 27 | Daughter | Saleslady | Montana |
| 59 | Bernard Harrington | 24 | Son | Stenographer | Montana |
| 60 | Josephine Rawley | 53 | Head | Laundrywork | Irish Free St |
| 61 | Dennis P Crawley | 54 | Head | Metal Miner | Irish Free St |
| 62 | Nora Crawley | 57 | Wife | — | Irish Free St |
| 63 | Norman D Crawley | 22 | Son | Elevator Op. | Montana |
| 64 | Marion K Crawley | 20 | Daughter | Stenographer | Montana |
| 65 | Timothy J Crawley | 15 | Son | — | Montana |
| 66 | Mary Morgan | 50 | Head | — | Colorado |
| 67 | Daniel Morgan | 25 | Son | Metal Miner | Montana |
| 68 | Henry Morgan | 21 | Son | Laborer | Montana |
| 69 | Emmett Morgan | 21 | Son | Metal Miner | Montana |
| 70 | James Morgan | 18 | Son | — | Montana |
| 71 | Patricia Morgan | 13 | Daughter | — | Montana |
| 72 | Leslie R Lee | 33 | Head | Metal Miner | Mississippi |
| 73 | Hazel Lee | 26 | Wife | — | Mississippi |
| 74 | Dorothy J Lee | 7 | Daughter | — | Louisiana |
| 75 | Josephine Lee | 6 | Daughter | — | Louisiana |
| 76 | Lessie Mae Lee | 4 | Daughter | — | Louisiana |
| 77 | Darlene Lee | 2 | Daughter | — | Montana |
| 78 | Sylvester Byrnes | 59 | Head | Laborer | Colorado |
| 79 | Mary Symons | 80 | Head | — | England |
| 80 | May Symons | 46 | Daughter | Seamstress | England |
Pedigree Summary
Margaret + 1 sibling
Gen 1 · 3 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)