JB
James Blake — 1940 US Census Record
Model Tree available1940 United States Federal Census · Washington-County, Colorado
Our Model Tree links this James Blake across the 1910, 1920, 1930 and 1940 US Censuses in Washington-County, Colorado (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1910), then head of a 7-person household.
Age 30
b. ~1910
Male
Head
Born: Colorado
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Washington-County, Colorado |
| Surname | Blake |
| Given Name | James L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | R. |
| 1935 Residence (County) | Washington |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 450 |
| Highest Grade | No 6 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Farmer |
| Township / Ward | T 1 N |
| Est. Birth Year | ~1910 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Blake | Daughter | — | 6 | ~1934 |
| Shirley Blake | Daughter | — | 4 | ~1936 |
| Joseph Blake | Son | — | ~1940 | |
| James Blake | Head | — | 30 | ~1910 |
| Ruby Blake | Daughter | — | 2 | ~1938 |
| Mary Blake | Daughter | — | 5 | ~1935 |
| Faye Blake | Spouse | — | 31 | ~1909 |
Census Appearances
1910
Washington, Colorado
Son, age
Washington, Colorado · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | James L |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1920
Washington, Colorado
Son, age 10
Washington, Colorado · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | James L. B. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Washington, Colorado
Son, age 20
Washington, Colorado · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Blake |
| Given Name | James L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Missouri |
| Occupation | Farm Hand |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Washington-County, Colorado
Head, age 30
Washington-County, Colorado · implied b. ~1910 — 7 household members
| Surname | Blake |
| Given Name | James L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | R. |
| 1935 Residence (County) | Washington |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | OA |
| Hours Worked | 72 |
| Income (1939) | 450 |
| Highest Grade | No 6 |
| 1935 Residence | Colorado |
| 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 James Blake across 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Blake (~0.92 confidence) and father John Blake (~0.92 confidence) and father John Blake (~0.92 confidence) and mother Annette Blake (~0.92 confidence) and mother Bennett Blake (~0.92 confidence) and mother Jennet Blake (~0.92 confidence). The pedigree spans 1 generation with 6 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Blake
b. ~1872
Source father
● Household
· direct · ~0.92
Father
John Blake
b. ~1878
Source father
● Household
· direct · ~0.92
Father
John Blake
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Annette Blake
b. ~1881
Source mother
● Household
· direct · ~0.92
Mother
Bennett Blake
b. ~1886
Source mother
● Household
· direct · ~0.92
Mother
Jennet Blake
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Blake
Head · 1940 · age 30 · b. ~1910 · 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 — Washington-County, Colorado
Open full size
1940 US Federal Census — Washington-County, Colorado
Page Contents
36 people indexed on this census page (nara:1940:m-t0627-00480-00698)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Glenn E. Venrick | 5 | Son | — | Colorado |
| 42 | Florence T. Venrick | 68 | Mother | — | Nebraska |
| 43 | Goldie L. Brady | 18 | Ward | — | Colorado |
| 44 | Russell L. Brady | 17 | Ward | Farmer | Colorado |
| 45 | Clarence Reed | 70 | Head | — | Missouri |
| 46 | Cora Reed | 68 | Wife | — | Nebraska |
| 47 | Milford H. Rathjen | 24 | Head | Farm Laborer | Nebraska |
| 48 | June L. Rathjen | 19 | Wife | — | Colorado |
| 49 | Louis J. Gebauer | 32 | Head | Farmer | Colorado |
| 50 | Velma R. Gebauer | 24 | Wife | — | Colorado |
| 51 | David L. Gebauer | 5 | Son | — | Colorado |
| 52 | Charlotte L. Gebauer | 4 | Daughter | — | Colorado |
| 53 | Mary L. Gebauer | 2 | Daughter | — | Colorado |
| 54 | James L. Blake THIS PERSON | 30 | Head | Farmer | Colorado |
| 55 | Faye M. Blake | 31 | Wife | — | Nebraska |
| 56 | Dorothy L. Blake | 6 | Daughter | — | Colorado |
| 57 | Mary J. Blake | 5 | Daughter | — | Colorado |
| 58 | Shirley F. Blake | 4 | Daughter | — | Colorado |
| 59 | Ruby J. Blake | 2 | Daughter | — | Colorado |
| 60 | Joseph A. Blake | 0 | Son | — | Colorado |
| 61 | Joseph C. State | 57 | Head | Farmer | Illinois |
| 62 | Grace E. State | 53 | Wife | — | Nebraska |
| 63 | Melvin K. Churchill | 29 | Head | Farmer | Colorado |
| 64 | Bessie J. Churchill | 29 | Wife | — | Colorado |
| 65 | Kenneth M. Churchill | 10 | Son | — | Colorado |
| 66 | Raymond H. Churchill | 8 | Son | — | Colorado |
| 67 | Yvonne J. Churchill | 5 | Daughter | — | Colorado |
| 68 | Una J. Churchill | 3 | Daughter | — | Colorado |
| 69 | Glenda L. Churchill | 2 | Daughter | — | Colorado |
| 70 | Etta Churchill | 63 | Mother | — | Nebraska |
| 71 | Warren E. Harper | 28 | Head | Farmer | Iowa |
| 72 | Helena A. Harper | 22 | Wife | — | Colorado |
| 77 | Alvin C. Woodcock | 33 | Head | Farm Laborer | Missouri |
| 78 | Eva V. Woodcock | 31 | Wife | — | Missouri |
| 79 | Helen J. Woodcock | 4 | Daughter | — | Colorado |
| 80 | Phyllis A. Woodcock | 2 | Daughter | — | Colorado |
Related Census Records
Pedigree Summary
James
Gen 1 · 6 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)