MS
Margaret Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · St.-Clair-County, Illinois
Our Model Tree links this Margaret Sullivan across the 1920, 1930 and 1940 US Censuses in St.-Clair-County, Illinois (XGBoost, ~Confirmed), with identified parents Michael & Mike — first a daughter (b.~1915), then head of a 6-person household.
Age 25
b. ~1915
Female
Daughter
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Clair-County, Illinois |
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Additional Details | |
| Occupation | Housework |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 688 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Housework |
| Township / Ward | East St Louis |
| Est. Birth Year | ~1915 |
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 |
|---|---|---|---|---|
| Margaret Sullivan | Daughter | — | 25 | ~1915 |
| Florence Sullivan | Daughter | — | 30 | ~1910 |
| Mike Sullivan | Head | — | 62 | ~1878 |
| Thelma May | Other | — | 40 | ~1900 |
| George Brown | Other | — | 45 | ~1895 |
| Lulu Sullivan | Spouse | — | 58 | ~1882 |
Census Appearances
1920
St Clair, …
Daughter, age 5
St Clair, Illinois · implied b. ~1915 — 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 | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Indiana |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
St Clair, …
Daughter, age 15
St Clair, Illinois · implied b. ~1915 — 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 | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Indiana |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
St.-Clair-County, Illinois
Daughter, age 25
St.-Clair-County, Illinois · implied b. ~1915 — 6 household members
| Surname | Sullivan |
| Given Name | Margaret |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | East St. Louis |
| 1935 Residence (County) | St. Clair |
| Occupation | Housework |
| Industry | W.P.A. |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 688 |
| Highest Grade | Hs 2 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Michael Sullivan (~0.92 confidence) and father Mike Sullivan (~0.92 confidence) and father Michael Sullivan (~0.92 confidence) and mother Lulu Sullivan (~0.92 confidence) and mother Lulu Sullivan (~0.92 confidence) and mother Eula Sullivan (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Michael Sullivan
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Mike Sullivan
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Michael Sullivan
b. ~1881
Source father
● Household
· direct · ~0.92
Mother
Lulu Sullivan
b. ~1882
Source mother
● Household
· direct · ~0.92
Mother
Lulu Sullivan
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Eula Sullivan
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Sullivan
Daughter · 1940 · age 25 · b. ~1915 · Illinois
★ You are viewing this record
Sibling
Florence Sullivan
Sibling · 1940 · age 30
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 — St.-Clair-County, Illinois
Open full size
1940 US Federal Census — St.-Clair-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00880-00113)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Alex Kalish | 46 | Head | Laborer | Poland |
| 2 | Tillis Kalish | 42 | Wife | — | Poland |
| 3 | William Kalish | 22 | Son | Laborer | Illinois |
| 4 | Lenore Kalish | 9 | Daughter | — | Illinois |
| 5 | John Kuyawski | 54 | Head | Laborer | Poland |
| 6 | Mista Kuyawski | 48 | Wife | — | Poland |
| 7 | Jean Kuyawski | 21 | Daughter | Laborer | Illinois |
| 8 | Charles Kuyawski | 18 | Son | Laborer | Illinois |
| 9 | Andrew Rakita | 53 | Head | Laborer | Poland |
| 10 | Hedwick Rakita | 49 | Wife | Domestic | Poland |
| 11 | Joseph Rakita | 30 | Son | Clerical | Illinois |
| 12 | Anna Rakita | 23 | Daughter | Laborer | Illinois |
| 13 | John Rakita | 21 | Son | Laborer | Illinois |
| 14 | Stanley Rakita | 20 | Son | — | Illinois |
| 15 | Lottie Rakita | 18 | Daughter | Laborer | Illinois |
| 16 | Frank Rakita | 16 | Son | — | Illinois |
| 17 | Adam Luberda | 52 | Head | Laborer | Poland |
| 18 | Cather Luberda | 49 | Wife | — | Poland |
| 19 | Louis Luberda | 21 | Son | Laborer | Illinois |
| 20 | Alex Luberda | 19 | Son | Parking Lot Attendant | Illinois |
| 21 | Walter Luberda | 17 | Son | — | Illinois |
| 22 | Andrew Luberda | 15 | Son | — | Illinois |
| 23 | Charles Miller | 66 | Head | — | Illinois |
| 24 | Della Miller | 59 | Wife | — | Indiana |
| 25 | Sarah Miller | 55 | Head | — | Illinois |
| 26 | Cecil Miller | 21 | Son | Collector | Illinois |
| 27 | Louis Intaya | 41 | Head | Laborer | Mexico |
| 28 | Marie Intaya | 43 | Wife | — | Mexico |
| 29 | Mike Sullivan | 62 | Head | — | Ireland |
| 30 | Lulu Sullivan | 58 | Wife | — | Indiana |
| 31 | Florence Sullivan | 30 | Daughter | — | Illinois |
| 32 | Margaret Sullivan THIS PERSON | 25 | Daughter | Housework | Illinois |
| 33 | George Brown | 45 | Lodger | Porter | New Mexico |
| 34 | Thelma May | 40 | Lodger | Saleswoman | Tennessee |
| 35 | Fred Gistad | 55 | Head | Police Dept | Illinois |
| 36 | Minnie Gistad | 50 | Wife | — | Missouri |
| 37 | Vera Schwartz | 30 | Daughter | Nurse | Illinois |
| 38 | Patrick Hayes | 62 | Lodger | Meat Inspector | Missouri |
| 39 | Charles Kling | 39 | Boarder | Manager | Illinois |
| 40 | Dorothy Lovell | 24 | Head | Waitress | Illinois |
Pedigree Summary
Margaret + 1 sibling
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)