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John Blackburn — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Harris-County, Texas
Our Model Tree links this John Blackburn across the 1930 and 1940 US Censuses in Harris-County, Texas (XGBoost, ~Confirmed) — first a head (b.~1884), then head of a 8-person household.
Age 56
b. ~1884
Male
Head
Born: Texas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Harris-County, Texas |
| Surname | Blackburn |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | HOUSTON CITY |
| Additional Details | |
| Occupation | Machinist |
| Industry | Lumber Mill |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1350 |
| Highest Grade | No 6 |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Occupation | Machinist |
| Township / Ward | Houston City |
| Est. Birth Year | ~1884 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Rutha Blackburn | Daughter | — | 17 | ~1923 |
| Gerald Blackburn | Son | — | 5 | ~1935 |
| John Blackburn | Head | — | 56 | ~1884 |
| Quida Blackburn | Other | — | 19 | ~1921 |
| Margie Blackburn | Daughter | — | 14 | ~1926 |
| Vernon Blackburn | Son | — | 22 | ~1918 |
| Thomas Callahan | Other | — | 47 | ~1893 |
| Estella Blackburn | Spouse | — | 51 | ~1889 |
Census Appearances
1930
Harris, Texas
Head, age 46
Harris, Texas · implied b. ~1884 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blackburn |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 46 |
| Marital Status | Married |
| Birthplace | Texas |
| Age at First Marriage | 23 |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Occupation | Machinist |
| Industry | Planing Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Harris-County, Texas
Head, age 56
Harris-County, Texas · implied b. ~1884 — 8 household members
| Surname | Blackburn |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | HOUSTON CITY |
| Occupation | Machinist |
| Industry | Lumber Mill |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1350 |
| Highest Grade | No 6 |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Blackburn
Head · 1940 · age 56 · b. ~1884 · Texas
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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 — Harris-County, Texas
Open full size
1940 US Federal Census — Harris-County, Texas
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-04190-00599)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Erma M Mitchell | 24 | Wife | Finisher | Kansas |
| 42 | Beverly S Mitchell | 6 | Daughter | — | Kansas |
| 43 | Dominic A Robillard | 28 | Head | Sausage Foreman | Louisiana |
| 44 | Christine Robillard | 28 | Wife | — | Louisiana |
| 45 | Huey A Robillard | 6 | Son | — | Louisiana |
| 46 | George Thomas | 52 | Head | Carpenter | California |
| 47 | Tony L Thomas | 23 | Son | Carpenter | California |
| 48 | Henry H Mccoy | 45 | Lodger | Cabinet Maker | California |
| 49 | Hugh H Mcdonald | 47 | Head | Machinist | Mississippi |
| 50 | Mary P Mcdonald | 34 | Wife | — | Mississippi |
| 51 | Rebecca B Mcdonald | 14 | Daughter | — | Mississippi |
| 52 | Maurice B Garnick | 30 | Head | Interior Decorator | Wisconsin |
| 53 | Ruth Garnick | 27 | Wife | — | Texas |
| 54 | Willier Inge | 10 | Step-Daughter | — | Texas |
| 55 | Lawrence Inge | 8 | Step-Son | — | Texas |
| 56 | James F Biles | 34 | Head | Carpenter | Alabama |
| 57 | Ellie L Biles | 24 | Wife | — | Alabama |
| 58 | Charles E Biles | 10 | Son | — | Alabama |
| 60 | Claude L Warren | 28 | Head | Sales-Clerk | Texas |
| 61 | Gennetta Warren | 27 | Wife | — | Texas |
| 62 | Corrinne Ladd | 40 | Lodger | — | Texas |
| 63 | Jesse K Barnes | 26 | Head | Cement Worker | Texas |
| 64 | Winnie M Barnes | 22 | Wife | — | Arkansas |
| 65 | Kirby W Barnes | 3 | Son | — | Texas |
| 66 | John H Blackburn THIS PERSON | 56 | Head | Machinist | Texas |
| 67 | Estella Blackburn | 51 | Wife | — | Texas |
| 68 | Rutha L Blackburn | 17 | Daughter | — | Texas |
| 69 | Margie E Blackburn | 14 | Daughter | — | Texas |
| 70 | Gerald W Blackburn | 5 | Son | — | Texas |
| 71 | Vernon W Blackburn | 22 | Son | Bookkeeper | Texas |
| 72 | Quida Blackburn | 19 | Daughter-in-law | Saleslady | Mississippi |
| 73 | Thomas Callahan | 47 | Lodger | City Fireman | Texas |
| 74 | John P Brooks | 45 | Head | Accountant | Texas |
| 75 | Jamie L Brooks | 42 | Wife | — | Texas |
| 76 | John C Jr Brooks | 15 | Son | — | Texas |
| 77 | William C Hamilton | 27 | Head | Installer | Texas |
| 78 | Irene F Hamilton | 29 | Wife | — | Texas |
| 79 | Peggy D Hamilton | 2 | Daughter | — | Texas |
| 80 | Martha Hope | 55 | Head | — | Arkansas |
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)