TS
Thomas Sullivan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Cook-County, Illinois
Our Model Tree links this Thomas Sullivan across the 1920, 1930 and 1940 US Censuses in Cook-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1880), then head of a 7-person household.
Age 60
b. ~1880
Male
Head
Born: Ireland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Cook-County, Illinois |
| Surname | Sullivan |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Laborer |
| Industry | Ice Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 884 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
| Occupation | Laborer |
| Township / Ward | Chicago |
| Est. Birth Year | ~1880 |
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 Thomas | Age | Birth yr |
|---|---|---|---|---|
| Rita Sullivan | Daughter | — | 13 | ~1927 |
| Eilene Sullivan | Daughter | — | 21 | ~1919 |
| Thomas Sullivan | Head | — | 60 | ~1880 |
| James Sullivan | Son | — | 15 | ~1925 |
| Thomas Sullivan | Son | — | 18 | ~1922 |
| John Sullivan | Son | — | 24 | ~1916 |
| Kathalene Sullivan | Spouse | — | 44 | ~1896 |
Census Appearances
1920
Cook, Illinois
Head, age 40
Cook, Illinois · implied b. ~1880 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Ireland |
| Year of Immigration | 1902 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Sign Hanger |
| Industry | Cusack Co. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Birth Country | Ireland |
| Year of Naturalization | 1910 |
| Birthplace (normalized) | ireland |
1930
Cook, Illinois
Head, age 50
Cook, Illinois · implied b. ~1880 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Ireland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1900 |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 4000 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
1940
Cook-County, Illinois
Head, age 60
Cook-County, Illinois · implied b. ~1880 — 7 household members
| Surname | Sullivan |
| Given Name | Thomas |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Ireland |
| 1935 Residence (City) | Chicago |
| 1935 Residence (County) | Cook |
| Naturalization Status | Naturalized |
| Occupation | Laborer |
| Industry | Ice Plant |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 884 |
| Highest Grade | 8 |
| 1935 Residence | Same House |
| Birth Country | Ireland |
| Birthplace (normalized) | ireland |
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 Thomas Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Thomas Sullivan
Head · 1940 · age 60 · b. ~1880 · Illinois
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Cook-County, Illinois
Open full size
1940 US Federal Census — Cook-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00943-00882)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Patricia A. Gest | 2 | Grand | — | Illinois |
| 42 | Thomas Sullivan THIS PERSON | 60 | Head | Laborer | Ireland |
| 43 | Kathalene Sullivan | 44 | Wife | — | Ireland |
| 44 | John Sullivan | 24 | Son | Meter Reader | Illinois |
| 45 | Eilene Sullivan | 21 | Daughter | Laborer | Illinois |
| 46 | Thomas Sullivan | 18 | Son | New Worker | Illinois |
| 47 | James Sullivan | 15 | Son | — | Illinois |
| 48 | Rita M. Sullivan | 13 | Daughter | — | Illinois |
| 49 | John Novak | 47 | Head | Painter | Illinois |
| 50 | Ellis Novak | 50 | Wife | — | Illinois |
| 51 | Marian Novak | 9 | Daughter | — | Illinois |
| 52 | Theresa Novak | 6 | Daughter | — | Illinois |
| 53 | Loretta Novak | 4 | Daughter | — | Illinois |
| 54 | Mary J. Morris | 59 | Head | Matron | Iowa |
| 55 | Jane Watterson | 73 | Cousin | — | Ireland |
| 56 | John Maher | 40 | Head | Order Clerk | Illinois |
| 57 | Teresa Maher | 45 | Wife | — | Illinois |
| 58 | Paul Wantroba | 57 | Head | Laborer | Poland |
| 59 | Kathrine Wantroba | 56 | Wife | — | Poland |
| 60 | Andrew Wantroba | 29 | Son | Sales Clerk | Illinois |
| 61 | Emanuel Saponis | 44 | Head | Postal Clerk | Illinois |
| 62 | Helen Saponis | 41 | Wife | — | Illinois |
| 63 | Dorothy Saponis | 17 | Daughter | Waitress | Illinois |
| 64 | Lorraine Saponis | 9 | Daughter | — | Illinois |
| 65 | Marie Lynch | 38 | Head | Bookkeeper | Illinois |
| 66 | Edward Lynch | 36 | Brother | Mechanic | Illinois |
| 67 | Julia Lynch | 37 | Sister | Bookkeeper | Illinois |
| 68 | John Mytczak | 47 | Head | Laborer | Poland |
| 69 | Kathrine Mytczak | 43 | Wife | Janitress | Poland |
| 70 | Sophie Mytczak | 18 | Daughter | Laborer | Illinois |
| 71 | Stella Mytczak | 16 | Daughter | — | Illinois |
| 72 | John N. Mcintyre | 31 | Head | Clerk | Illinois |
| 73 | Ellis Mcintyre | 35 | Wife | — | Ireland |
| 74 | Frank Stivick | 39 | Head | Peddler | Illinois |
| 75 | Rose Stivick | 34 | Wife | — | Illinois |
| 76 | Virginia Stivick | 13 | Daughter | — | Illinois |
| 77 | Rose M. Stivick | 3 | Daughter | — | Illinois |
| 78 | Agnes Kucharski | 30 | Sister in law | Waitress | Illinois |
| 79 | Joyce Kucharski | 9 | Niece | — | Illinois |
| 80 | Agnes Genkot | 52 | Head | — | Poland |
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)