JB
John Baird — 1940 US Census Record
Model Tree available1940 United States Federal Census · Boulder-County, Colorado
Our Model Tree links this John Baird across the 1920, 1930 and 1940 US Censuses in Boulder-County, Colorado (XGBoost, ~Confirmed), with identified parents William & William — first a son (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Boulder-County, Colorado |
| Surname | Baird |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Boulder City |
| 1935 Residence (County) | Boulder |
| Additional Details | |
| Occupation | Part time Teacher |
| Industry | State School of Mines |
| Class of Worker | GW |
| Hours Worked | 25 |
| Income (1939) | 450 |
| Highest Grade | C 5 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Part Time Teacher |
| Township / Ward | Boulder City |
| Est. Birth Year | ~1913 |
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 |
|---|---|---|---|---|
| Ruby Smith | Other | — | 43 | ~1897 |
| Maud Baird | Head | — | 62 | ~1878 |
| John Baird | Son | — | 27 | ~1913 |
Census Appearances
1920
Boulder, Colorado
Son, age 7
Boulder, Colorado · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baird |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Boulder, Colorado
Son, age 18
Boulder, Colorado · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Baird |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Alabama |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Boulder-County, Colorado
Son, age 27
Boulder-County, Colorado · implied b. ~1913 — 3 household members
| Surname | Baird |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | Boulder City |
| 1935 Residence (County) | Boulder |
| Occupation | Part time Teacher |
| Industry | State School of Mines |
| Class of Worker | GW |
| Hours Worked | 25 |
| Income (1939) | 450 |
| Highest Grade | C 5 |
| 1935 Residence | Same place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Baird (~0.92 confidence) and father William Baird (~0.92 confidence) and mother Maud Baird (~0.92 confidence) and mother Maude Baird (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Baird
b. ~1865
Source father
● Household
· direct · ~0.92
Father
William Baird
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Maud Baird
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Maude Baird
b. ~1879
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Baird
Son · 1940 · age 27 · b. ~1913 · Colorado
★ 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 — Boulder-County, Colorado
Open full size
1940 US Federal Census — Boulder-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00457-00683)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Sandham | 14 | son | — | Illinois |
| 2 | Ruth Sandham | 5 | daughter | — | Illinois |
| 3 | Adeline W. Gilson | 65 | mother | — | Ohio |
| 4 | Hilson Sandham | 16 | son | — | Illinois |
| 5 | Frank W. Harris | 36 | Head | Foreman Of Mine | Colorado |
| 6 | Inna D. Harris | 44 | wife | — | Colorado |
| 7 | Glenn Harris | 14 | son | — | Colorado |
| 8 | Edward H. Ellis | 50 | Head | Lawyer | Pennsylvania |
| 9 | Edith H. Ellis | 48 | wife | Office Asst. | Indiana |
| 10 | Janet C. Ellis | 17 | daughter | — | Colorado |
| 11 | George W. Cowdery | 47 | Head | President & Manager | Colorado |
| 12 | Olin Branch Cowdery | 49 | wife | — | Colorado |
| 13 | Ella Mae Burt | 21 | daughter | Clerk | Colorado |
| 14 | Ernest Mccoy | 39 | Head | Teller | W. Virginia |
| 15 | Caressa Mccoy | 39 | wife | — | Kansas |
| 16 | Milburn Mccoy | 14 | son | — | Colorado |
| 17 | Mary Lou Mccoy | 9 | daughter | — | Colorado |
| 18 | Maud M. Baird | 62 | Head | — | Iowa |
| 19 | John Baird THIS PERSON | 27 | son | Part Time Teacher | Colorado |
| 20 | Ruby C. Smith | 43 | Lodger | Book Keeper | Texas |
| 21 | John H. Gilman | 61 | Head | Owner | New York |
| 22 | Rex Gilman | 29 | son | Partner & Manager | Nebraska |
| 23 | Maxine Gilman | 21 | wife | — | Missouri |
| 24 | Nancy Gilman | 4 | daughter | — | Colorado |
| 25 | Linda Jean Gilman | 2 | daughter | — | Colorado |
| 26 | Hettie Weis | 20 | Maid | Maid | Kansas |
| 27 | Frank R. Spencer | 60 | Head | Physician & Surgeon | Iowa |
| 28 | Edith C. Spencer | 54 | wife | — | Illinois |
| 29 | John Robert Spencer | 22 | son | — | Colorado |
| 30 | John L. Waller | 50 | Head | Asst. Supt. | Colorado |
| 31 | Lessie Waller | 49 | wife | — | Nebraska |
| 32 | Jack Waller | 19 | son | — | Colorado |
| 33 | Preston Waller | 17 | son | — | Colorado |
| 34 | C. Nelson Eddy | 56 | Head | Dentist | So. Dakota |
| 35 | Margaret Eddy | 55 | wife | — | Iowa |
| 36 | Sallie Maude Miller | 68 | Head | — | Missouri |
| 37 | Leroy Miller | 38 | son | Owner & Manager | Colorado |
| 38 | Glenn Storke | 35 | Head | Salesman | Missouri |
| 39 | Charlotte Storke | 35 | wife | Notary Public | New Mexico |
| 40 | Shirley Storke | 13 | daughter | — | Colorado |
Pedigree Summary
John
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)