JB
John Baird — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Spink-County, South Dakota
Our Model Tree links this John Baird across the 1930 and 1940 US Censuses in Spink-County, South Dakota (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 7-person household.
Age 13
b. ~1927
Male
Son
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Spink-County, South Dakota |
| Surname | Baird |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Frankfort City |
| 1935 Residence (County) | Spink |
| Additional Details | |
| Highest Grade | S 7 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Township / Ward | Frankfort City |
| Est. Birth Year | ~1927 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Stanley Baird | Son | — | 12 | ~1928 |
| Berwin Baird | Daughter | — | 4 | ~1936 |
| John Baird | Son | — | 13 | ~1927 |
| Donna Baird | Daughter | — | 9 | ~1931 |
| Jeannette Baird | Daughter | — | 8 | ~1932 |
| Paul Baird | Head | — | 38 | ~1902 |
| Alice Baird | Spouse | — | 34 | ~1906 |
Census Appearances
1930
Spink, South …
Son, age 3
Spink, South Dakota · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baird |
| Given Name | John Paul |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Spink-County, South …
Son, age 13
Spink-County, South Dakota · implied b. ~1927 — 7 household members
| Surname | Baird |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Frankfort City |
| 1935 Residence (County) | Spink |
| Highest Grade | S 7 |
| 1935 Residence | Same place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Baird across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Baird
Son · 1940 · age 13 · b. ~1927 · South Dakota
★ You are viewing this record
Sibling
Jeannette Baird
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Berwin Baird
Sibling · 1940 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Stanley Baird
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donna Baird
Sibling · 1940 · age 9
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 — Spink-County, South Dakota
Open full size
1940 US Federal Census — Spink-County, South Dakota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03867-00492)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Vera Wiles | 14 | Daughter | — | South Dakota |
| 2 | Evan Wiles | 12 | Son | — | South Dakota |
| 3 | Merl Wiles | 9 | Son | — | South Dakota |
| 4 | Neva Wiles | 5 | Daughter | — | South Dakota |
| 5 | Mina Ruschenberg | 78 | Head | — | Germany |
| 6 | Le Roy Valder | 23 | Head | Truck Driver | South Dakota |
| 7 | Ruth Valder | 19 | Wife | — | South Dakota |
| 8 | Donald Valder | 0 | Son | — | South Dakota |
| 9 | Oscar Bout | 44 | Head | Farmer | South Dakota |
| 10 | Marie Bout | 44 | Wife | — | Michigan |
| 11 | Olaf Wike | 56 | Head | Hograiser | Norway |
| 12 | George Sheldon | 47 | Head | Farmer | Iowa |
| 13 | Marie Sheldon | 41 | Wife | — | Iowa |
| 14 | Phyllis Sheldon | 13 | Daughter | — | South Dakota |
| 15 | Walter P. Christopherson | 57 | Head | Depot Agent | Wisconsin |
| 16 | Catherine Christopherson | 54 | Wife | — | Wisconsin |
| 17 | Paul L. Baird | 38 | Head | Rural Mail Carrier | Illinois |
| 18 | Alice Baird | 34 | Wife | — | Iowa |
| 19 | John P. Baird THIS PERSON | 13 | Son | — | South Dakota |
| 20 | Stanley Baird | 12 | Son | — | South Dakota |
| 21 | Donna J. Baird | 9 | Daughter | — | South Dakota |
| 22 | Jeannette Baird | 8 | Daughter | — | South Dakota |
| 23 | Berwin L. Baird | 4 | Daughter | — | South Dakota |
| 24 | Clarence M. Lang | 59 | Head | Drilling Station Operator | Dakota Territory |
| 25 | Raymond C. Drayer | 45 | Head | Proprietor | South Dakota |
| 26 | Pearl Drayer | 46 | Wife | — | South Dakota |
| 27 | Richard Drayer | 16 | Son | — | South Dakota |
| 28 | Dennis Drayer | 11 | Son | — | South Dakota |
| 29 | Roswell D. Bird | 81 | Head | — | Illinois |
| 30 | Ella Bird | 56 | Wife | — | Dakota Territory |
| 31 | Perry Liebig | 35 | Head | Truck Driver | South Dakota |
| 32 | Eunice Liebig | 28 | Wife | — | South Dakota |
| 33 | Daryl Liebig | 11 | Son | — | South Dakota |
| 34 | Geraldine Liebig | 8 | Daughter | — | South Dakota |
| 35 | James Liebig | 6 | Son | — | South Dakota |
| 36 | Ann Liebig | 5 | Daughter | — | South Dakota |
| 37 | Jewel Liebig | 4 | Daughter | — | South Dakota |
| 38 | Evan B. Jones | 61 | Head | Farmer | Kansas |
| 39 | Marguerite Jones | 27 | Daughter | School Teacher | South Dakota |
| 40 | Lawrence B. Jones | 29 | Son | Truck Driver | South Dakota |
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)