RA
Robert Armstrong — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Robert Armstrong across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Harry — first a head (b.~1912), then head of a 3-person household.
Age 28
b. ~1912
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Armstrong |
| Given Name | Robert J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Maintenance |
| Industry | Medical Lab |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | C 2 |
| 1935 Residence | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Maintenance |
| Township / Ward | Rocky Ripple |
| Est. Birth Year | ~1912 |
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 Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Armstrong | Head | — | 28 | ~1912 |
| Robert Armstrong | Son | — | 3 | ~1937 |
| Rosemary Armstrong | Spouse | — | 25 | ~1915 |
Census Appearances
1920
Marion, Indiana
Son, age 7
Marion, Indiana · implied b. ~1913 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 18
Marion, Indiana · implied b. ~1912 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Robert C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Occupation | Clerk |
| Industry | Grocery |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Head, age 28
Marion-County, Indiana · implied b. ~1912 — 3 household members
| Surname | Armstrong |
| Given Name | Robert J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Maintenance |
| Industry | Medical Lab |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1200 |
| Highest Grade | C 2 |
| 1935 Residence | Indiana |
| 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 Armstrong across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Armstrong (~0.92 confidence). The pedigree spans 1 generation with 1 identified ancestor.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Armstrong
b. ~1883
Source father
● Household
· direct · ~0.92
This person
Anchor record
Robert Armstrong
Head · 1940 · age 28 · b. ~1912 · 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-t0627-01076-00376)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lulu Esker | 57 | Wife | Cleaner | Indiana |
| 2 | Joseph L. Averill | 69 | Head | Accountant | Indiana |
| 3 | Daisy W. Averill | 67 | Wife | — | Kansas |
| 4 | Jacob L. Herald | 37 | Head | Cigar Clerk | Indiana |
| 5 | Mary H. Herald | 25 | Wife | — | Indiana |
| 6 | Richard L. Herald | 5 | Son | — | Indiana |
| 7 | Ann Maria Herald | 4 | Daughter | — | Indiana |
| 8 | Arl Junior Myers | 30 | Head | Carpenter | North Carolina |
| 9 | Vollie V. Myers | 30 | Wife | — | North Carolina |
| 10 | Robert Lee Myers | 11 | Son | — | North Carolina |
| 11 | Wyvona G. Myers | 7 | Daughter | — | North Carolina |
| 12 | Charles L. Myers | 6 | Son | — | North Carolina |
| 13 | John William Myers | 2 | Son | — | Indiana |
| 14 | Harry White | 48 | Head | Pressman | Indiana |
| 15 | Jessie M. White | 48 | Wife | — | Indiana |
| 16 | Kenneth White | 25 | Son | Carpenter & Service Man | Indiana |
| 17 | Rosemary White | 19 | Daughter | Typist | Indiana |
| 18 | Frank D. Heffelfinger | 60 | Head | Steam Fitter | Indiana |
| 19 | Michael F. Woody | 34 | Head | Checker | Indiana |
| 20 | Ruth E. Woody | 26 | Wife | — | Indiana |
| 21 | Patricia Ann Woody | 5 | Daughter | — | Indiana |
| 22 | Michael F. Jr. Woody | 3 | Son | — | Indiana |
| 23 | Robert J. Armstrong THIS PERSON | 28 | Head | Maintenance | Indiana |
| 24 | Rosemary Armstrong | 25 | Wife | — | Indiana |
| 25 | Robert Jr. Armstrong | 3 | Son | — | Indiana |
| 26 | William P. Armstrong | 33 | Head | Business Solicitor | Indiana |
| 27 | Betty Armstrong | 29 | Wife | — | Indiana |
| 28 | Harry G. Scarborough | 47 | Head | Electrician | Colorado |
| 29 | Cora Scarborough | 47 | Wife | Bookkeeper | Indiana |
| 30 | Margery Scarborough | 23 | Daughter | — | Indiana |
| 31 | John C. Schneider | 54 | Head | Plumber | Indiana |
| 32 | Louise Schneider | 52 | Wife | — | Indiana |
| 33 | John Jr. Schneider | 22 | Son | Utility Man And Clerk | Indiana |
| 34 | Lester Bailey | 23 | Head | Milk Driver | Indiana |
| 35 | Lillian Bailey | 22 | Wife | — | Indiana |
| 36 | Francis A. Worsley | 45 | Head | Owner | Canada |
| 37 | Peggy Worsley | 48 | Wife | Clerk | New Jersey |
| 38 | John Noon | 46 | Head | Cost And Estimator | Indiana |
| 39 | Myrtle Noon | 44 | Wife | — | Indiana |
| 40 | John Jr. Noon | 21 | Son | — | Indiana |
Pedigree Summary
Robert
Gen 1 · 1 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)