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John Sullivan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this John Sullivan across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Mike & Michael — first a son (b.~1913), then head of a 6-person household.
Age 27
b. ~1913
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Shoe maker |
| Industry | Shoe shop |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Shoemaker |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1913 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Anna Sullivan | Daughter | — | 19 | ~1921 |
| Margaret Sullivan | Daughter | — | 13 | ~1927 |
| Helen Sullivan | Daughter | — | 17 | ~1923 |
| Michael Sullivan | Head | — | 58 | ~1882 |
| John Sullivan | Son | — | 27 | ~1913 |
| Mary Sullivan | Spouse | — | 47 | ~1893 |
Census Appearances
1920
Marion, Indiana
Son, age 7
Marion, Indiana · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 17
Marion, Indiana · implied b. ~1913 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Son, age 27
Marion-County, Indiana · implied b. ~1913 — 6 household members
| Surname | Sullivan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Shoe maker |
| Industry | Shoe shop |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 John Sullivan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Mike Sullivan (~0.92 confidence) and father Michael Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence) and mother Mary Sullivan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Mike Sullivan
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Michael Sullivan
b. ~1882
Source father
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1892
Source mother
● Household
· direct · ~0.92
Mother
Mary Sullivan
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Sullivan
Son · 1940 · age 27 · b. ~1913 · Indiana
★ You are viewing this record
Sibling
Anna Sullivan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Sullivan
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Sullivan
Sibling · 1940 · age 13
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01125-00872)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James Sykes | 24 | Head | Auditor | Indiana |
| 42 | Dorothy Sykes | 22 | Wife | — | Indiana |
| 43 | Joe Ann Sykes | 1 | Daughter | — | Indiana |
| 44 | Donald Sykes | 20 | Brother | — | Indiana |
| 45 | Mike Johns | 51 | Head | Laborer | Syria |
| 46 | Emily Johns | 50 | Wife | — | Syria |
| 47 | Samuel Johns | 21 | Son | Helper | Penna |
| 48 | Norman Johns | 19 | Son | Bookkeeper | Penna |
| 49 | Naima Johns | 17 | Daughter | — | Penna |
| 50 | Gloria Johns | 13 | Daughter | — | Penna |
| 51 | — | None | — | — | — |
| 52 | — | None | — | — | — |
| 53 | Olie H. Ward | 50 | Head | Tailor | Arkansas |
| 54 | Hazel Ward | 50 | Wife | — | Indiana |
| 55 | Claude H. Ward | 26 | Son | Truck Driver | Indiana |
| 56 | Carl F. Engelking | 48 | Head | Salesman | Indiana |
| 57 | Theresa Engelking | 48 | Wife | — | Indiana |
| 58 | Robert Engelking | 18 | Son | Laborer | Indiana |
| 59 | Franklin Brown | 23 | Son-in-law | Laborer | Indiana |
| 60 | Kathryn Brown | 20 | Daughter | — | Indiana |
| 61 | Gary Lee Brown | 1 | Grandson | — | Indiana |
| 62 | Frank Snell | 47 | Head | Cashier | Michigan |
| 63 | Ethel Snell | 43 | Wife | — | New York |
| 64 | Frank D. Snell | 22 | Son | Shipping Clerk | Michigan |
| 65 | Alden Snell | 17 | Son | — | Michigan |
| 66 | Fred Hyde | 55 | Head | Butcher | Indiana |
| 67 | Bertha Hyde | 52 | Wife | Laborer | Indiana |
| 68 | Thomas L. Tharp | 59 | Head | Carpenter | Kentucky |
| 69 | Laura Tharp | 64 | Wife | — | Ohio |
| 70 | Charles Riddle | 38 | Son-in-law | Printer | Indiana |
| 71 | Florence Riddle | 32 | Daughter | — | Indiana |
| 72 | Thomas Schoffer | 10 | Son-in-law | — | Indiana |
| 73 | Michael Sullivan | 58 | Head | Laborer | Ireland |
| 74 | Mary Sullivan | 47 | Wife | — | Indiana |
| 75 | John Sullivan THIS PERSON | 27 | Son | Shoe Maker | Indiana |
| 76 | Anna Kathryn Sullivan | 19 | Daughter | Stenographer | Indiana |
| 77 | Helen Sullivan | 17 | Daughter | — | Indiana |
| 78 | Margaret Sullivan | 13 | Daughter | — | Indiana |
| 79 | Freda Striebeck | 56 | Head | Meat Cook | Indiana |
| 80 | Leland Jefferson | 26 | Head | Bus Driver | Indiana |
Pedigree Summary
John + 3 siblings
Gen 1 · 4 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)