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Robert Johnston — 1940 US Census Record
Model Tree available1940 United States Federal Census · Philadelphia-County, Pennsylvania
Our Model Tree links this Robert Johnston across the 1920, 1930 and 1940 US Censuses in Philadelphia-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents Robert & Margaret — first a head (b.~1905), then head of a 3-person household.
Age 35
b. ~1905
Male
Head
Born: Penna
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Philadelphia-County, Pennsylvania |
| Surname | Johnston |
| Given Name | Robert L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Penna |
| 1935 Residence (City) | Philadelphia city |
| 1935 Residence (County) | Phila |
| Additional Details | |
| Occupation | Clerk |
| Industry | Banking |
| Class of Worker | PW |
| Hours Worked | 44 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
| Occupation | Clerk |
| Township / Ward | Philadelphia City |
| Est. Birth Year | ~1905 |
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 |
|---|---|---|---|---|
| Joan Johnston | Daughter | — | 5 | ~1935 |
| Robert Johnston | Head | — | 35 | ~1905 |
| Dorothy Johnston | Spouse | — | 33 | ~1907 |
Census Appearances
1920
Philadelphia, Pennsylvania
Son, age 14
Philadelphia, Pennsylvania · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Penna |
| Mother's Birthplace | Penna |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1930
Philadelphia, Pennsylvania
Son, age 24
Philadelphia, Pennsylvania · implied b. ~1906 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnston |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Penna |
| Father's Birthplace | Penna |
| Mother's Birthplace | Penna |
| Occupation | Mechanic |
| Industry | Automobiles |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
1940
Philadelphia-County, Pennsylvania
Head, age 35
Philadelphia-County, Pennsylvania · implied b. ~1905 — 3 household members
| Surname | Johnston |
| Given Name | Robert L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Penna |
| 1935 Residence (City) | Philadelphia city |
| 1935 Residence (County) | Phila |
| Occupation | Clerk |
| Industry | Banking |
| Class of Worker | PW |
| Hours Worked | 44 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | penna |
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 Johnston across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Robert Johnston (~0.92 confidence) and mother Margaret Johnston (~0.92 confidence) and father Robert Johnston (~0.92 confidence) and mother Catherine Johnston (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Robert Johnston
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Margaret Johnston
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
Robert Johnston
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Catherine Johnston
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Johnston
Head · 1940 · age 35 · b. ~1905 · Pennsylvania
★ 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 — Philadelphia-County, Pennsylvania
Open full size
1940 US Federal Census — Philadelphia-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03754-00344)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elmer Gallagher | 17 | Head | — | Penna |
| 2 | Irwin Goodwin | 63 | Head | Salesman | Indiana |
| 3 | Jessie H. Goodwin | 51 | Wife | — | Ohio |
| 4 | Eleanor Goodwin | 22 | Daughter | Secretary | Ohio |
| 5 | Theodore F. Behre | 36 | Head | Service Manager | Penna |
| 6 | Ruth S. Behre | 35 | Wife | — | Penna |
| 7 | Elaine Behre | 4 | Daughter | — | Penna |
| 8 | Richard Behre | 2 | Son | — | Penna |
| 9 | Anne Starck | 57 | Mother-in-law | — | Germany |
| 10 | William A. Hess | 35 | Head | Banking | Penna |
| 11 | Theresa Hess | 34 | Wife | — | Penna |
| 12 | Nancy Hess | 10 | Daughter | — | Penna |
| 13 | William Hess | 68 | Father | — | Penna |
| 14 | Garrick M. Bradley | 56 | Head | Salesman Engineer | Maryland |
| 15 | Florence G. Bradley | 53 | Wife | — | Penna |
| 16 | H. Thomas Bradley | 22 | Son | Roadman | Penna |
| 17 | — | None | — | — | — |
| 18 | Lena G. Bauman | 50 | Head | — | Penna |
| 19 | Robert Bauman | 20 | Son | Truck Driver | Penna |
| 20 | Abraham Trachtenberg | 53 | Lodger | — | Russia |
| 21 | Robert Mccormick | 51 | Head | Zone Manager | Penna |
| 22 | Beatrice A. Mccormick | 49 | Wife | — | Penna |
| 23 | Carl Street | 37 | Head | Teacher | Indiana |
| 24 | Margaret S. Street | 32 | Wife | — | New Jersey |
| 25 | Richard Street | 5 | Son | — | Penna |
| 26 | Andrew Street | 1 | Son | — | Penna |
| 27 | Charles B. Culbert | 57 | Head | Engineer | Penna |
| 28 | Edith E. Culbert | 57 | Wife | — | Penna |
| 29 | H. Maris Shearer | 71 | Head | Doctor | Penna |
| 30 | Alice Shearer | 62 | Wife | — | Penna |
| 31 | Robert L. Johnston THIS PERSON | 35 | Head | Clerk | Penna |
| 32 | Dorothy S. Johnston | 33 | Wife | — | Penna |
| 33 | Joan Johnston | 5 | Daughter | — | Penna |
| 34 | Harry Simons | 44 | Head | Teacher | Penna |
| 35 | Ethel G. Simons | 33 | Wife | — | Penna |
| 36 | Boyd Simons | 2 | Son | — | Penna |
| 37 | John Mcclure | 65 | Head | Printer | Northern Ireland |
| 38 | Margaret L. Mcclure | 59 | Wife | — | Penna |
| 39 | Catherine Mcclure | 33 | Daughter | Teacher | Penna |
| 40 | William Marks | 51 | Head | Yardmaster | Penna |
Pedigree Summary
Robert
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)