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John Simpson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this John Simpson across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents William & Frank — first a head (b.~1909), then head of a 3-person household.
Age 31
b. ~1909
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Simpson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Fireman |
| Industry | Warehouse |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1620 |
| Highest Grade | H-2 |
| 1935 Residence | Same Place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Fireman |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1909 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Connie Simpson | Daughter | — | 6 | ~1934 |
| John Simpson | Head | — | 31 | ~1909 |
| Sylvia Simpson | Spouse | — | 28 | ~1912 |
Census Appearances
1920
Marion, Indiana
Son, age 12
Marion, Indiana · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | John N. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 21
Marion, Indiana · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | John L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Propeller |
| Industry | Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Head, age 31
Marion-County, Indiana · implied b. ~1909 — 3 household members
| Surname | Simpson |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Fireman |
| Industry | Warehouse |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1620 |
| Highest Grade | H-2 |
| 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 Simpson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Simpson (~0.92 confidence) and father Frank Simpson (~0.92 confidence) and mother Augusta Simpson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Simpson
b. ~1875
Source father
● Household
· direct · ~0.92
Father
Frank Simpson
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Augusta Simpson
b. ~1888
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Simpson
Head · 1940 · age 31 · b. ~1909 · Indiana
★ You are viewing this record
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-t0627-01125-00685)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Martha Mcalpin | 30 | Wife | — | Indiana |
| 42 | Nancy Mcalpin | 10 | Daughter | — | Illinois |
| 43 | Martha Mcalpin | 9 | Son | — | Illinois |
| 44 | James Thomas | 54 | Head | Clerk | Indiana |
| 45 | Eva R. Thomas | 44 | Wife | Day Goods Store | Indiana |
| 46 | John Thomas | 21 | Son | Runner-Roll | Indiana |
| 47 | James Thomas | 18 | Son | — | Indiana |
| 48 | George Hendricks | 75 | Head | — | Indiana |
| 49 | Rosie E. Hendricks | 72 | Wife | — | Kentucky |
| 50 | Louis A. Hofman | 42 | Head | Optician | Indiana |
| 51 | Ruth M. Hofman | 39 | Wife | — | Massachusetts |
| 52 | James E. Hillman | 37 | Head | Stockchecker | Indiana |
| 53 | Ida Irene Hillman | 29 | Wife | — | Indiana |
| 54 | James N. Hillman | 7 | Son | — | Indiana |
| 55 | Ronald R. Hillman | 5 | Son | — | Indiana |
| 56 | Joseph H. Vandegate | 55 | Head | Truck Driver | Kentucky |
| 57 | Anna L. Vandegate | 47 | Wife | — | Pennsylvania |
| 58 | Amelia Medinger | 67 | Head | — | Indiana |
| 59 | Anna Medinger | 65 | Sister | — | Indiana |
| 60 | Herman Holtman | 67 | Lodger | — | Indiana |
| 61 | Wrong Information From Neighbor | None | — | — | — |
| 62 | George N. Caton | 51 | Head | Auto Mechanic | Illinois |
| 63 | Hester Caton | 45 | Wife | — | Illinois |
| 64 | John Simpson THIS PERSON | 31 | Head | Fireman | Indiana |
| 65 | Sylvia Simpson | 28 | Wife | — | Indiana |
| 66 | Connie Jean Simpson | 6 | Daughter | — | Indiana |
| 67 | Benson Sharpe | 50 | Head | Secretary | Ohio |
| 68 | Alice Sharpe | 37 | Wife | — | Illinois |
| 69 | Alice Sharpe | 8 | Daughter | — | Indiana |
| 70 | Carol Sharpe | 4 | Daughter | — | Indiana |
| 71 | Robert V. Sharpe | 1 | Son | — | Indiana |
| 72 | Fred King | 37 | Head | Machinist | Indiana |
| 73 | Mary A. King | 34 | Wife | — | Indiana |
| 74 | Charles E. Roldan | 27 | Brother-in-law | Machinist | Indiana |
| 75 | Patricia King | 9 | Daughter | — | Indiana |
| 76 | John H. Pein | 51 | Head | Manager | Ohio |
| 77 | Elsie M. Pein | 51 | Wife | — | Massachusetts |
| 78 | Dorothy M. Pein | 21 | Daughter | Stenographer | Indiana |
| 79 | Jeanette Pein | 14 | Daughter | — | Indiana |
| 80 | Horace Marsh | 60 | Head | Foreman | Indiana |
Pedigree Summary
John
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)