ES
Eugene Sullivan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lee-County, Illinois
Our Model Tree links this Eugene Sullivan across the 1920, 1930 and 1940 US Censuses in Lee-County, Illinois (XGBoost, ~Confirmed) — first a head (b.~1876), then head of a 5-person household.
Age 64
b. ~1876
Male
Head
Born: Illinois
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Lee-County, Illinois |
| Surname | Sullivan |
| Given Name | Eugene |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Amboy city |
| 1935 Residence (County) | Lee |
| Additional Details | |
| Occupation | Medical Doctor |
| Industry | Own Practice |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 32 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Medical Doctor |
| Township / Ward | Amboy City |
| Est. Birth Year | ~1876 |
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 Eugene | Age | Birth yr |
|---|---|---|---|---|
| Eugene Sullivan | Son | — | 29 | ~1911 |
| Mary Sullivan | Spouse | — | 65 | ~1875 |
| Daniel Sullivan | Son | — | 25 | ~1915 |
| Edward Sullivan | Son | — | 28 | ~1912 |
| Eugene Sullivan | Head | — | 64 | ~1876 |
Census Appearances
1920
Lee, Illinois
Head, age 42
Lee, Illinois · implied b. ~1878 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Eugene A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | Illinois |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Salesman |
| Industry | Confectionery |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Lee, Illinois
Head, age 52
Lee, Illinois · implied b. ~1878 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | Eugene S. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 28 |
| Father's Birthplace | New York State |
| Mother's Birthplace | New York State |
| Occupation | Physician |
| Industry | General Practice |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | $9000 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Lee-County, Illinois
Head, age 64
Lee-County, Illinois · implied b. ~1876 — 5 household members
| Surname | Sullivan |
| Given Name | Eugene |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 64 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Amboy city |
| 1935 Residence (County) | Lee |
| Occupation | Medical Doctor |
| Industry | Own Practice |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 32 |
| Highest Grade | C 4 |
| 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 Eugene 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
Eugene Sullivan
Head · 1940 · age 64 · b. ~1876 · 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 — Lee-County, Illinois
Open full size
1940 US Federal Census — Lee-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00836-00040)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Everett Liney | 36 | Head | Manager | Illinois |
| 2 | Delyla Liney | 36 | Wife | — | Illinois |
| 3 | Janelle Liney | 13 | Daughter | — | Illinois |
| 4 | Marilyn Liney | 9 | Daughter | — | Illinois |
| 5 | Grace Scott | 70 | Mother | — | Illinois |
| 6 | Walter Acker | 67 | Head | Bus Driver | Illinois |
| 7 | Georgia Acker | 67 | Wife | — | Illinois |
| 8 | Harold Carroll | 31 | Head | Market Mechanic | Illinois |
| 9 | Georgia Carroll | 30 | Wife | — | Wyoming |
| 10 | Harold Carroll | 7 | Son | — | Illinois |
| 11 | Donald Carroll | 3 | Son | — | Illinois |
| 12 | Nancy Carroll | 2 | Daughter | — | Illinois |
| 13 | Virgil Carroll | 13 | Brother | — | Illinois |
| 14 | William Knuth | 31 | Head | Trucker | Illinois |
| 15 | Lavern Knuth | 28 | Wife | Seamstress | Illinois |
| 16 | Laverne Knuth | 6 | Daughter | — | Illinois |
| 17 | Rita Knuth | 3 | Daughter | — | Illinois |
| 18 | George Tuttle | 49 | Head | Plumber | Illinois |
| 19 | Mildred Tuttle | 43 | Wife | — | Illinois |
| 20 | Minnie Tuttle | 74 | Mother | — | Illinois |
| 21 | Juliet Barclay | 55 | Head | Roomers | Scotland |
| 22 | Hazel Spangler | 25 | Lodger | Stenographer | Illinois |
| 23 | Marion Simpson | 33 | Lodger | Advisor | Illinois |
| 24 | Jennette Nelly | 21 | Lodger | Teacher | Illinois |
| 25 | Nanetta Gordon | 12 | Lodger | Stenographer | Illinois |
| 26 | Mary Milton | 22 | Lodger | Bookkeeper | Maryland |
| 27 | Louis Wiser | 59 | Head | Truck Driver | Switzerland |
| 28 | Christine Wiser | 48 | Wife | — | Illinois |
| 29 | Mabel Wiser | 24 | Daughter | Telephone Operator | Illinois |
| 30 | Mildred Wiser | 22 | Daughter | Packer | Illinois |
| 31 | Marion Wiser | 20 | Daughter | New Worker | Illinois |
| 32 | Eugene Sullivan THIS PERSON | 64 | Head | Medical Doctor | Illinois |
| 33 | Mary Sullivan | 65 | Wife | — | Illinois |
| 34 | Eugene Sullivan | 29 | Son | Medical Doctor | Illinois |
| 35 | Edward Sullivan | 28 | Son | Attorney | Illinois |
| 36 | Daniel Sullivan | 25 | Son | — | Illinois |
| 37 | William Halladay | 39 | Head | Medical Doctor | Iowa |
| 38 | Ruby Halladay | 37 | Wife | — | Iowa |
| 39 | Nancy Halladay | 7 | Daughter | — | Illinois |
| 40 | Maurice Partelow | 43 | Head | Freight Agent | Illinois |
Related Census Records
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)