JB
John Blackburn — 1940 US Census Record
Model Tree available1940 United States Federal Census · Fayette-County, Pennsylvania
Our Model Tree links this John Blackburn across the 1920, 1930 and 1940 US Censuses in Fayette-County, Pennsylvania (XGBoost, ~Confirmed), with identified parents George & George — first a son (b.~1902), then head of a 4-person household.
Age 38
b. ~1902
Male
Son
Born: Pennsylvania
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Fayette-County, Pennsylvania |
| Surname | Blackburn |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Upper Tyrone Twp. |
| 1935 Residence (County) | Fayette |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 250 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Occupation | Laborer |
| Township / Ward | Upper Tyrone Twp |
| Est. Birth Year | ~1902 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Roy Blackburn | Son | — | 21 | ~1919 |
| George Blackburn | Head | — | 61 | ~1879 |
| Elizabeth Blackburn | Spouse | — | 61 | ~1879 |
| John Blackburn | Son | — | 38 | ~1902 |
Census Appearances
1920
Fayette, Pennsylvania
Son, age 18
Fayette, Pennsylvania · implied b. ~1902 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Laborer |
| Industry | Coke Oven |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Fayette, Pennsylvania
Son, age 27
Fayette, Pennsylvania · implied b. ~1903 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1940
Fayette-County, Pennsylvania
Son, age 38
Fayette-County, Pennsylvania · implied b. ~1902 — 4 household members
| Surname | Blackburn |
| Given Name | John W. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| 1935 Residence (City) | Upper Tyrone Twp. |
| 1935 Residence (County) | Fayette |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 52 |
| Income (1939) | 250 |
| Highest Grade | 7 |
| 1935 Residence | Same place |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Blackburn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Blackburn (~0.92 confidence) and father George Blackburn (~0.92 confidence) and mother Elizabeth Blackburn (~0.92 confidence) and mother Elizabeth Blackburn (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Blackburn
b. ~1872
Source father
● Household
· direct · ~0.92
Father
George Blackburn
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Elizabeth Blackburn
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Elizabeth Blackburn
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Blackburn
Son · 1940 · age 38 · b. ~1902 · Pennsylvania
★ You are viewing this record
Sibling
Roy Blackburn
Sibling · 1940 · age 21
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 — Fayette-County, Pennsylvania
Open full size
1940 US Federal Census — Fayette-County, Pennsylvania
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03508-00606)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ernest Sherman | 29 | Head | Laborer | Pennsylvania |
| 2 | Olive Sherman | 29 | Wife | — | Pennsylvania |
| 3 | Doris Sherman | 10 | Daughter | — | Pennsylvania |
| 4 | Helen Sherman | 8 | Daughter | — | Pennsylvania |
| 5 | Dorothy Sherman | 10 | Daughter | — | Pennsylvania |
| 6 | Elizabeth Ruth | 83 | Head | — | Pennsylvania |
| 7 | George Blackburn | 61 | Head | — | Pennsylvania |
| 8 | Elizabeth Blackburn | 61 | Wife | — | Pennsylvania |
| 9 | John W. Blackburn THIS PERSON | 38 | Son | Laborer | Pennsylvania |
| 10 | Roy Blackburn | 21 | Son | Laborer | Pennsylvania |
| 11 | Frank Hamel | 30 | Head | — | Pennsylvania |
| 12 | Harmon Hamel | 33 | Husband | Laborer | Pennsylvania |
| 13 | Irena Hamel | 7 | Daughter | — | Pennsylvania |
| 14 | Anna Hamel | 4 | Daughter | — | Pennsylvania |
| 15 | Harriet Hamel | 2 | Daughter | — | Pennsylvania |
| 16 | Barkley Swift | 64 | Head | Farm Hand | Pennsylvania |
| 17 | Eva Swift | 59 | Wife | — | Pennsylvania |
| 18 | Stella Swift | 34 | Daughter | — | Pennsylvania |
| 19 | John W. Swift | 33 | Son | Heater Helper | Pennsylvania |
| 20 | Gloria S. Swift | 5 | Granddaughter | — | Pennsylvania |
| 21 | Frank Moore | 59 | Head | Laborer | Pennsylvania |
| 22 | Anna Moore | 57 | Wife | — | Pennsylvania |
| 23 | Wade Moore | 21 | Son | New Worker | Pennsylvania |
| 24 | Frank Moore | 16 | Son | — | Pennsylvania |
| 25 | Donald Moore | 13 | Son | — | Pennsylvania |
| 26 | Harry P. Rhodes | 59 | Head | Core Maker | West Virginia |
| 27 | Sophia Rhodes | 55 | Wife | — | Pennsylvania |
| 28 | Elmer Rhodes | 29 | Son | Clerk | Pennsylvania |
| 29 | Elizabeth Rhodes | 22 | Daughter | Clerk | Pennsylvania |
| 30 | Eugene Rhodes | 35 | Head | Laborer | Pennsylvania |
| 31 | Mabel Rhodes | 40 | Wife | — | Pennsylvania |
| 32 | William Rhodes | 9 | Son | — | Pennsylvania |
| 33 | Mildred Rhodes | 7 | Daughter | — | Pennsylvania |
| 34 | Naomi Montgomery | 62 | Head | — | Kentucky |
| 35 | Catherine Montgomery | 32 | Daughter | Teacher | Kentucky |
| 36 | Joseph Opolinsky | 50 | Head | Farmer | Poland |
| 37 | Stella Opolinsky | 47 | Wife | — | Poland |
| 38 | Joseph Opolinsky | 23 | Son | Miner | Pennsylvania |
| 39 | Dorothy Opolinsky | 21 | Daughter | Waitress | Pennsylvania |
| 40 | Theodore Opolinsky | 19 | Son | Farmer | Pennsylvania |
Pedigree Summary
John + 1 sibling
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)