MS
Margaret Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Margaret Sullivan across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Arthur & Ann — first a daughter (b.~1912), then head of a 6-person household.
Age 28
b. ~1912
Female
Daughter
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Teacher (Sub) |
| Industry | Parochial School |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 420 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Teacher |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1912 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Mary Sullivan | Daughter | — | 36 | ~1904 |
| Abbie Sullivan | Daughter | — | 32 | ~1908 |
| Margaret Sullivan | Daughter | — | 28 | ~1912 |
| Nora Sullivan | Daughter | — | 30 | ~1910 |
| Ann Sullivan | Head | — | 59 | ~1881 |
| Patrick Maloney | Other | — | 83 | ~1857 |
Census Appearances
1920
Baltimore, Maryland
Daughter, age 8
Baltimore, Maryland · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Daughter, age 18
Baltimore, Maryland · implied b. ~1912 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Saleslady |
| Industry | Drug Store |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Daughter, age 28
Baltimore-City-County, Maryland · implied b. ~1912 — 6 household members
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Teacher (Sub) |
| Industry | Parochial School |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 420 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 Arthur Sullivan (~0.92 confidence) and mother Ann Sullivan (~0.92 confidence) and mother Barbara Sullivan (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Arthur Sullivan
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Ann Sullivan
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Barbara Sullivan
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Sullivan
Daughter · 1940 · age 28 · b. ~1912 · Maryland
★ You are viewing this record
Sibling
Nora Sullivan
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Abbie Sullivan
Sibling · 1940 · age 32
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Sullivan
Sibling · 1940 · age 36
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 — Baltimore-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01532-00629)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles J. Erdman | 55 | Head | Night Watchman | Maryland |
| 2 | Ida F. Erdman | 56 | Wife | — | Maryland |
| 3 | Annabelle Erdman | 20 | Daughter | — | Maryland |
| 4 | J. Gordon Rohn | 29 | Head | Service Clerk | Maryland |
| 5 | Eunice Rohn | 27 | Wife | Chief Clerk | Maryland |
| 6 | Eugene E. Stump | 53 | Head | — | Maryland |
| 7 | Margaret M. Stump | 47 | Wife | Ins. Agent | Maryland |
| 8 | William M. Stump | 25 | Son | Saleslady | Maryland |
| 9 | Margaret M. Stump | 18 | Daughter | Lab. Technician | Maryland |
| 10 | Ann Sullivan | 59 | Head | Comp. Operator | Ireland |
| 11 | Mary Sullivan | 36 | Daughter | Stenographer | Maryland |
| 12 | Abbie Sullivan | 32 | Daughter | Stenographer | Maryland |
| 13 | Nora Sullivan | 30 | Daughter | Stenographer | Maryland |
| 14 | Margaret Sullivan THIS PERSON | 28 | Daughter | Teacher (Sub) | Maryland |
| 15 | Patrick Maloney | 83 | Cousin | — | Ireland |
| 16 | Henry Lederer | 45 | Head | Purchasing Clerk | Maryland |
| 17 | Henrietta Lederer | 31 | Wife | — | Maryland |
| 18 | Gloria Lederer | 11 | Daughter | — | Maryland |
| 19 | Michael Lederer | 6 | Son | — | Maryland |
| 20 | Anna B. Gould | 50 | Head | Grad. Nurse | Maryland |
| 21 | William D. Gould | 26 | Son | Auditing Clerk | Maryland |
| 22 | Dewey Vaughan | 39 | Head | Stockupk. | Stockuph. | North Carolina |
| 23 | Helen Vaughan | 30 | Wife | — | Dist. Columbia |
| 24 | Donna Vaughan | 9 | Daughter | — | Dist. Columbia |
| 25 | John J. Barry | 48 | Head | Civil Engineer | New Jersey |
| 26 | Dorothy T. Barry | 46 | Wife | — | Maryland |
| 27 | John G. Barry | 22 | Son | Investigator | Maryland |
| 28 | John M. Heagerty | 46 | Head | Produce Sales. | Maryland |
| 29 | Rose L. Heagerty | 43 | Wife | — | Maryland |
| 30 | Betty Lee Heagerty | 18 | Daughter | — | Maryland |
| 31 | Frederick Bunger | 41 | Head | Cab Driver | Maryland |
| 32 | Fay Bunger | 24 | Wife | Tailor | Maryland |
| 33 | Amelia Nicholson | 46 | Head | — | Greece |
| 34 | Angela Nicholson | 16 | Daughter | — | Maryland |
| 35 | Louise Nicholson | 14 | Daughter | — | Maryland |
| 36 | Elaine Nicholson | 8 | Daughter | — | Maryland |
| 37 | Fannie Shomloo | 57 | Mother | Seamstress | Greece |
| 38 | George E. Herr | 59 | Head | Inspector | Germany |
| 39 | Ethel I. Herr | 60 | Wife | — | New York |
| 40 | Marie E. Herr | 26 | Daughter | Bill Clerk | Maryland |
Pedigree Summary
Margaret + 3 siblings
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)