MS
Margaret Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Margaret Sullivan across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed), with identified parents James & James — first a daughter (b.~1918), then head of a 5-person household.
Age 22
b. ~1918
Female
Daughter
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | Secretary |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 900 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Secretary |
| Township / Ward | San Francisco |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Betty Sullivan | Daughter | — | 21 | ~1919 |
| Margaret Sullivan | Daughter | — | 22 | ~1918 |
| Marion Sullivan | Daughter | — | 23 | ~1917 |
| James Sullivan | Head | — | 53 | ~1887 |
| Margaret Sullivan | Spouse | — | 53 | ~1887 |
Census Appearances
1920
San Francisco, …
Daughter, age 1
San Francisco, California · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Daughter, age 12
San Francisco, California · implied b. ~1918 — 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 | 12 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Daughter, age 22
San-Francisco-County, California · implied b. ~1918 — 5 household members
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | Secretary |
| Industry | Insurance |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 900 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 James Sullivan (~0.92 confidence) and father James Sullivan (~0.92 confidence) and father John Sullivan (~0.92 confidence) and mother Annie Sullivan (~0.92 confidence) and mother Margaret Sullivan (~0.92 confidence) and mother Catherine Sullivan (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Sullivan
b. ~1887
Source father
● Household
· direct · ~0.92
Father
James Sullivan
b. ~1885
Source father
● Household
· direct · ~0.92
Father
John Sullivan
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Annie Sullivan
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Margaret Sullivan
b. ~1887
Source mother
● Household
· direct · ~0.92
Mother
Catherine Sullivan
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Sullivan
Daughter · 1940 · age 22 · b. ~1918 · California
★ You are viewing this record
Sibling
Marion Sullivan
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Betty Sullivan
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 — San-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00312-00749)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bertha T. Lucas | 55 | Daughter | Operator | Mexico |
| 2 | Patrick Mcquade | 49 | Head | Salesman | Canada |
| 3 | Mary Rich | 52 | Daughter | Secretary | California |
| 4 | Charles Rich | 23 | Son | Adjuster | California |
| 5 | June Rich | 19 | Daughter | Clerical | California |
| 6 | Curtis Rich | 28 | Son | Salesman | California |
| 7 | John Rich | 12 | Cousin | — | California |
| 8 | Lester Rick | 40 | Head | Book Binder | California |
| 9 | Katherine Rick | 40 | Wife | — | California |
| 10 | Emil Straessler | 48 | Head | Clerk | California |
| 11 | Edouisa Straessler | 47 | Wife | — | California |
| 12 | Emil Jr. Straessler | 25 | Son | Advertiser | California |
| 13 | Harold Barber | 37 | Head | Cook | California |
| 14 | Jessie Barber | 32 | Wife | — | Nevada |
| 15 | Melba Barber | 8 | Daughter | — | California |
| 16 | Mis-Information Void | None | — | — | — |
| 17 | — | None | — | — | — |
| 18 | James T. Sullivan | 53 | Head | — | Ireland |
| 19 | Margaret Sullivan | 53 | Wife | — | Ireland |
| 20 | Marion Sullivan | 23 | Daughter | Claims Dept | California |
| 21 | Margaret Sullivan THIS PERSON | 22 | Daughter | Secretary | California |
| 22 | Betty Sullivan | 21 | Daughter | Claims Dept | California |
| 23 | James Millar | 82 | Head | — | Scotland |
| 24 | Jennette Millar | 75 | Wife | — | Scotland |
| 25 | Dreyer Millar | 40 | Daughter | — | Scotland |
| 26 | Cornelius Mahoney | 60 | Head | Trackman | Ireland |
| 27 | Catherine Mahoney | 60 | Wife | — | Ireland |
| 28 | Cornelius Jr. Mahoney | 26 | Son | Motorman | California |
| 29 | James Allan | 60 | Head | Plumber | Scotland |
| 30 | Grace Allan | 60 | Wife | — | Scotland |
| 31 | Norman Allan | 23 | Son | Bookkeeper | Canada |
| 32 | Carl Forester | 60 | Head | Dental-Surgeon | Nova Scotia |
| 33 | Aline Forester | 46 | Wife | — | California |
| 34 | William Forester | 26 | Son | Clerk | California |
| 35 | Edna Hensley | 56 | Sister in law | — | California |
| 36 | Albert W. Crumpton | 62 | Head | Food Checker | England |
| 37 | Helen Crumpton | 52 | Wife | — | Pennsylvania |
| 38 | Albert J. Crumpton | 31 | Son | Bus. Rep Representative | Pennsylvania |
| 39 | Joseph Robertson | 32 | Head | Clerical | California |
| 40 | Chloe Robertson | 25 | Wife | — | Indiana |
Related Census Records
Pedigree Summary
Margaret + 2 siblings
Gen 1 · 6 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)