JB
John Bullock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boulder-County, Colorado
Our Model Tree links this John Bullock across the 1920, 1930 and 1940 US Censuses in Boulder-County, Colorado (XGBoost, ~Confirmed) — first a head (b.~1863), then head of a 3-person household.
Age 77
b. ~1863
Male
Head
Born: New York
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Boulder-County, Colorado |
| Surname | Bullock |
| Given Name | John A |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Boulder City |
| 1935 Residence (County) | Boulder |
| Additional Details | |
| Industry | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same House |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
| Township / Ward | Boulder City |
| Est. Birth Year | ~1863 |
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 Bullock | Head | — | 77 | ~1863 |
| Adelpha Bullock | Son | — | 50 | ~1890 |
| Dora Bullock | Spouse | — | 76 | ~1864 |
Census Appearances
1920
Boulder, Colorado
Head, age 56
Boulder, Colorado · implied b. ~1864 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bullock |
| Given Name | John A. |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | New York |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | salesman |
| Industry | retail grocery |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1930
Boulder, Colorado
Other, age 67
Boulder, Colorado · implied b. ~1863 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bullock |
| Given Name | John A. |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | New York |
| Age at First Marriage | 21 |
| Father's Birthplace | New York |
| Mother's Birthplace | New York |
| Occupation | painter |
| Industry | interior work |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
1940
Boulder-County, Colorado
Head, age 77
Boulder-County, Colorado · implied b. ~1863 — 3 household members
| Surname | Bullock |
| Given Name | John A |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | New York |
| 1935 Residence (City) | Boulder City |
| 1935 Residence (County) | Boulder |
| Industry | 0 |
| Highest Grade | G 8 |
| 1935 Residence | Same House |
| Birth State | New York |
| Birth Country | United States |
| Birthplace (normalized) | new york |
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 Bullock across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Bullock
Head · 1940 · age 77 · b. ~1863 · 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-t0627-00457-00567)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Margaret B Hill | 40 | Wife | — | Illinois |
| 2 | Jane Hill | 16 | Daughter | — | Colorado |
| 3 | Elizabeth E Hill | 15 | Daughter | — | Colorado |
| 4 | Peggy B Hill | 13 | Daughter | — | Colorado |
| 5 | Sally T Hill | 10 | Daughter | — | Colorado |
| 6 | Robert P Hill | 8 | Son | — | Colorado |
| 7 | James R Hill | 7 | Son | — | Colorado |
| 8 | Jacqueline M Hill | 4 | Daughter | — | Colorado |
| 9 | Francis M Knight | 75 | Head | — | Kansas |
| 10 | Warren E Wood | 75 | Head | Labor | Iowa |
| 11 | Myrtle M Wood | 65 | Wife | Clerk - Mail Order Store | Kansas |
| 12 | Clyde O Bolton | 60 | Head | Farming | Colorado |
| 13 | Eunice B Bolton | 52 | Wife | — | Colorado |
| 14 | Earl C Bolton | 15 | Son | — | Colorado |
| 15 | Allen D Bolton | 40 | Head | Salesman | Colorado |
| 16 | Eva L Bolton | 27 | Wife | — | Colorado |
| 17 | Sylvia L Bolton | 2 | Daughter | — | Colorado |
| 18 | William H Ploofner|Ploefner | 46 | Head | Auto Packing | New York |
| 19 | Cora V Ploofner|Ploefner | 45 | Wife | — | Nebraska |
| 20 | John Strick | 58 | Lodger | — | Colorado |
| 21 | Russell Cobb | 20 | Head | Hard Rock Miner | Kansas |
| 22 | Elizabeth Cobb | 20 | Wife | — | Colorado |
| 23 | Mary L Cobb | 1 | Daughter | — | Colorado |
| 24 | Lawrence D Hull | 26 | Head | Skating Rink | Kansas |
| 25 | Evelyn B Hull | 24 | Wife | — | Kansas |
| 26 | Lois D Hull | 4 | Daughter | — | Kansas |
| 27 | Dale W Hull | 21 | Lodger | Manager | Kansas |
| 28 | Earl R Hinkle | 31 | Head | Carpenter | Louisiana |
| 29 | Inez P Hinkle | 31 | Wife | — | Colorado |
| 30 | Lavonne Hinkle | 4 | Daughter | — | Colorado |
| 31 | Joe W Fleming|Flemm | 24 | Head | Electrician | Colorado |
| 32 | Thelma L Fleming|Flemm | 25 | Wife | — | Illinois |
| 33 | Stella Henderson | 68 | Head | — | Iowa |
| 34 | Fred C Davis | 31 | Lodger | Roofing Carpenter | Colorado |
| 35 | John A Bullock THIS PERSON | 77 | Head | — | New York |
| 36 | Dora C Bullock | 76 | Wife | — | Wisconsin |
| 37 | Adelpha A Bullock | 50 | Son | — | Wisconsin |
| 38 | Walter N Halderman|Haldeman | 61 | Head | — | Missouri |
| 39 | Charles H Halderman|Haldeman | 38 | Son | Deliveryman Dairy Milk | Nebraska |
| 40 | Nadine N Halderman|Haldeman | 24 | Daughter | Secretary Stenographer | Nebraska |
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)