RS
Robert Simpson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Robert Simpson across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed) — first a head (b.~1897), then head of a 4-person household.
Age 43
b. ~1897
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Simpson |
| Given Name | Robert D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| Additional Details | |
| Occupation | City Fireman |
| Industry | Indianapolis Fire Department |
| Class of Worker | GW |
| Hours Worked | 72 |
| Income (1939) | 600 |
| Highest Grade | 8 |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | City Fireman |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1897 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Simpson | Head | — | 43 | ~1897 |
| Hubert Simpson | Son | — | 21 | ~1919 |
| Robert Simpson | Son | — | 22 | ~1918 |
| Sally Simpson | Spouse | — | 40 | ~1900 |
Census Appearances
1920
Marion, Indiana
Head, age 23
Marion, Indiana · implied b. ~1897 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Robert |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Inspector |
| Industry | Motor Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Head, age 33
Marion, Indiana · implied b. ~1897 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | Robert D |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Indiana |
| Age at First Marriage | 20 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | fireman |
| Industry | city fire dept |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 26 |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Head, age 43
Marion-County, Indiana · implied b. ~1897 — 4 household members
| Surname | Simpson |
| Given Name | Robert D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| Occupation | City Fireman |
| Industry | Indianapolis Fire Department |
| Class of Worker | GW |
| Hours Worked | 72 |
| Income (1939) | 600 |
| Highest Grade | 8 |
| 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 Robert Simpson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Robert Simpson
Head · 1940 · age 43 · b. ~1897 · Indiana
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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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01124-00149)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Minor Everets | 46 | Head | Painter | Indiana |
| 2 | Mary Everets | 42 | Wife | — | Indiana |
| 3 | John W. Everets | 14 | Son | — | Indiana |
| 4 | Bera Everets | 11 | Daughter | — | Indiana |
| 5 | Betty Everets | 10 | Daughter | — | Indiana |
| 6 | Roger Link | 32 | Head | Inspector | Indiana |
| 7 | Frances Link | 29 | Wife | — | Indiana |
| 8 | Robert D. Simpson THIS PERSON | 43 | Head | City Fireman | Indiana |
| 9 | Sally E. Simpson | 40 | Wife | — | Indiana |
| 10 | Robert Jr. Simpson | 22 | Son | Musician | Indiana |
| 11 | Hubert E. Simpson | 21 | Son | Stock Clerk | Indiana |
| 12 | Amos Perry | 30 | Head | Deliveryman | Indiana |
| 13 | Mary Perry | 23 | Wife | — | Indiana |
| 14 | Roscoe Perry | 32 | Head | Hatter | Indiana |
| 15 | Rose Perry | 30 | Wife | — | Indiana |
| 16 | Patricia Ann Perry | 8 | Daughter | — | Indiana |
| 17 | James L. Perry | 3 | Son | — | Indiana |
| 18 | Lawrence Bailiff | 26 | Head | Ice And Coal Man | Indiana |
| 19 | Lucille Bailiff | 15 | Wife | — | Missouri |
| 20 | Darrell Clearwater | 43 | Head | Oilman | Illinois |
| 21 | Maude Clearwater | 40 | Wife | — | Indiana |
| 22 | Richard Clearwater | 16 | Son | — | Indiana |
| 23 | Jean Clearwater | 14 | Daughter | — | Indiana |
| 24 | Guy Biddle | 42 | Head | Supervisor | Kentucky |
| 25 | Adel Biddle | 39 | Wife | — | Kentucky |
| 26 | Betty Lou Biddle | 8 | Daughter | — | Indiana |
| 27 | Edward Bennett | 78 | Head | Maintenance | Indiana |
| 28 | Emma Bennett | 70 | Wife | — | Indiana |
| 29 | Cleason Alexander | 41 | Head | Machinist | Massachusetts |
| 30 | Marguerite Alexander | 43 | Wife | — | Indiana |
| 32 | James Raisor | 25 | Head | Inspector | Indiana |
| 33 | Violetta Raisor | 20 | Wife | — | Indiana |
| 34 | Janis W. Raisor | 2 | Son | — | Indiana |
| 35 | Millard Line | 25 | Head | Emergency Clerk | Illinois |
| 36 | Irene Line | 22 | Wife | — | Indiana |
| 37 | John Line | 2 | Son | — | Indiana |
| 38 | Riley Richards | 24 | Head | Truck Driver | Indiana |
| 39 | Velda Richards | 24 | Wife | — | Indiana |
| 40 | Leon Richards | 9 | Son | — | Indiana |
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)