JB
John Blackburn — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jefferson-County, Ohio
Our Model Tree links this John Blackburn across the 1920, 1930 and 1940 US Censuses in Jefferson-County, Ohio (XGBoost, ~Confirmed), with identified parents John & Thomas — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Ohio |
| Surname | Blackburn |
| Given Name | John F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Steubenville City |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Occupation | Spot Tester |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1524 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Spot Tester |
| Township / Ward | Steubenville City |
| Est. Birth Year | ~1917 |
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 |
|---|---|---|---|---|
| John Blackburn | Head | — | 56 | ~1884 |
| John Blackburn | Son | — | 23 | ~1917 |
| Jessie Blackburn | Spouse | — | 54 | ~1886 |
Census Appearances
1920
Jefferson, Ohio
Son, age 3
Jefferson, Ohio · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Jefferson, Ohio
Son, age 14
Jefferson, Ohio · implied b. ~1916 — 27 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Jefferson-County, Ohio
Son, age 23
Jefferson-County, Ohio · implied b. ~1917 — 3 household members
| Surname | Blackburn |
| Given Name | John F |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | Steubenville City |
| 1935 Residence (County) | Jefferson |
| Occupation | Spot Tester |
| Industry | Steel Mill |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1524 |
| Highest Grade | H 4 |
| 1935 Residence | Same house |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 John Blackburn (~0.92 confidence) and father Thomas Blackburn (~0.92 confidence) and mother Jessie Blackburn (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Blackburn
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Thomas Blackburn
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Jessie Blackburn
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Blackburn
Son · 1940 · age 23 · b. ~1917 · Ohio
★ 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 — Jefferson-County, Ohio
Open full size
1940 US Federal Census — Jefferson-County, Ohio
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03092-00082)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Fred C Sweeney | 23 | Head | Engineer | Ohio |
| 42 | Hazel O Sweeney | 23 | Wife | — | Ohio |
| 43 | Fred Clark Jr Sweeney | 0 | Son | — | Ohio |
| 44 | Sherman Dunkle | 36 | Head | Shearman | Pennsylvania |
| 45 | Virginia Dunkle | 30 | Wife | — | Ohio |
| 46 | Robert E Dunkle | 3 | Son | — | Ohio |
| 47 | Albert Jr Purger | 57 | Father | Cook | Ohio |
| 48 | Dallas R Higgins | 40 | Head | Policeman | Ohio |
| 49 | Alma X Higgins | 37 | Wife | — | Ohio |
| 50 | Robert Higgins | 16 | Son | — | Ohio |
| 51 | Margaret Higgins | 14 | Daughter | — | Ohio |
| 52 | Mary Alice Mcdonald | 74 | Mother | — | Ohio |
| 53 | Roy A Klein | 46 | Head | Inspector | Pennsylvania |
| 54 | Mary A Klein | 41 | Wife | Relief Inspector | Ohio |
| 55 | Leroy H Klein | 18 | Son | — | Ohio |
| 56 | William H Klein | 11 | Son | — | Ohio |
| 57 | John F Blackburn | 56 | Head | Janitor | Ohio |
| 58 | Jessie B Blackburn | 54 | Wife | — | Ohio |
| 59 | John F Blackburn THIS PERSON | 23 | Son | Spot Tester | Ohio |
| 60 | David A Price | 73 | Head | — | England |
| 61 | Hannah Price | 73 | Wife | — | England |
| 62 | Mary L Boyle | 60 | Head | — | Pennsylvania |
| 63 | Robert Boyle | 33 | Son | Investigator | Ohio |
| 64 | Maurice Boyle | 29 | Son | Bank Clerk | Ohio |
| 65 | George H Mcfadden | 36 | Head | Proprietor | Ohio |
| 66 | Charlotte H Mcfadden | 35 | Wife | — | Ohio |
| 67 | Mary B Mcfadden | 8 | Daughter | — | Ohio |
| 68 | Sigrid Sten | 27 | Servant | Housemaid | West Virginia |
| 69 | Emerson S Reed | 72 | Head | — | Ohio |
| 70 | Margaret O Reed | 71 | Wife | — | Ohio |
| 71 | Ralph M Reed | 44 | Son | Engineer | Ohio |
| 72 | Daphne Reed | 42 | Daughter | School Teacher | Ohio |
| 73 | Beatrice Reed | 35 | Daughter | Clerk | Ohio |
| 74 | Eugene Reed | 16 | Son | — | Ohio |
| 75 | May G Little | 43 | Head | Proprietor | Russia |
| 76 | Eva G Little | 33 | Wife | — | Ohio |
| 77 | Jeannine R Little | 2 | Daughter | — | Ohio |
| 78 | Herman M Luntz | 38 | Head | Slagger | New Jersey |
| 79 | Janice A Luntz | 31 | Wife | — | Pennsylvania |
| 80 | Thomas Luntz | 2 | Son | — | Ohio |
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)