JC
James Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Denver-County, Colorado
Our Model Tree links this James Clark across the 1920, 1930 and 1940 US Censuses in Denver-County, Colorado (XGBoost, ~Confirmed), with identified parents Sidney & Sidney — first a son (b.~1915), then head of a 4-person household.
Age 25
b. ~1915
Male
Son
Born: New Mexico
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Denver-County, Colorado |
| Surname | Clark |
| Given Name | James P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Mexico |
| 1935 Residence (City) | City & County of Denver |
| 1935 Residence (County) | Denver |
| Additional Details | |
| Occupation | Teacher |
| Industry | Public Night School |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | Hsc-4 |
| 1935 Residence | Same place |
| Birth State | New Mexico |
| Birth Country | United States |
| Birthplace (normalized) | new mexico |
| Occupation | Teacher |
| Township / Ward | City County Of Denver |
| Est. Birth Year | ~1915 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Sidney Clark | Head | — | 64 | ~1876 |
| Flora Reese | Other | — | 75 | ~1865 |
| James Clark | Son | — | 25 | ~1915 |
| Alice Clark | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Denver, Colorado
Son, age 5
Denver, Colorado · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | James P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | New Mexico |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Illinois |
| Birth State | New Mexico |
| Birth Country | United States |
| Birthplace (normalized) | new mexico |
1930
Denver, Colorado
Son, age 15
Denver, Colorado · implied b. ~1915 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | James E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | New Mexico |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Illinois |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | New Mexico |
| Birth Country | United States |
| Birthplace (normalized) | new mexico |
1940
Denver-County, Colorado
Son, age 25
Denver-County, Colorado · implied b. ~1915 — 4 household members
| Surname | Clark |
| Given Name | James P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | New Mexico |
| 1935 Residence (City) | City & County of Denver |
| 1935 Residence (County) | Denver |
| Occupation | Teacher |
| Industry | Public Night School |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1400 |
| Highest Grade | Hsc-4 |
| 1935 Residence | Same place |
| Birth State | New Mexico |
| Birth Country | United States |
| Birthplace (normalized) | new mexico |
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 Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Sidney Clark (~0.92 confidence) and father Sidney Clark (~0.92 confidence) and mother Alice Clark (~0.92 confidence) and mother Alice Clark (~0.92 confidence) and father George Pace (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Sidney Clark
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Sidney Clark
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Alice Clark
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Alice Clark
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
George Pace
b. ~1850
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Clark
Son · 1940 · age 25 · b. ~1915 · 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 — Denver-County, Colorado
Open full size
1940 US Federal Census — Denver-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00487-00709)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Ila N. Anderson | 63 | Sister | Teacher | Colorado |
| 2 | Arnold, Ruth Anderson | 47 | niece | Servant | Tennessee |
| 3 | W. A. Carter | 48 | Head | — | Ohio |
| 4 | June Carter | 62 | Wife | — | Nova Scotia |
| 5 | William Q. Horblit | 62 | Head | Boiler Maker | Nebraska |
| 6 | Martha Horblit | 60 | Wife | — | Iowa |
| 7 | William Horblit | 20 | Son | Laboratory | Colorado |
| 8 | Fern Horblit | 17 | Daughter | — | Colorado |
| 9 | Mary J. Carey | 70 | Head | — | Massachusetts |
| 10 | George W. Sheridan | 32 | Head | Engineer | Georgia |
| 11 | Velma Sheridan | 31 | Wife | — | Georgia |
| 12 | Shirley Sheridan | 7 | daughter | — | Georgia |
| 13 | Walford Karlson | 66 | Head | Butcher | Nebraska |
| 14 | Charlotte Karlson | 36 | Wife | — | Iowa |
| 15 | Wallace Peterson | 16 | step-son | — | Nebraska |
| 16 | Lawrence Karlson | 43 | Brother | Butcher | Nebraska |
| 17 | William Patterson | 50 | Head | — | Kansas |
| 18 | Frances Patterson | 48 | Wife | — | Colorado |
| 19 | Bertha Mays | 53 | Lodger | Seamstress | Ohio |
| 20 | Merle R. Mehans | 23 | Head | Musician | Colorado |
| 21 | Evelyn M. Mehans | 18 | Wife | — | Colorado |
| 22 | Sidney W. Clark | 64 | Head | Broker | Michigan |
| 23 | Alice T. Clark | 55 | Wife | — | Illinois |
| 24 | James P. Clark THIS PERSON | 25 | Son | Teacher | New Mexico |
| 25 | Flora Reese | 75 | mother-in-law | — | Illinois |
| 26 | Gust Fahlberg | 64 | Head | Gardner | Sweden |
| 27 | Signe Fahlberg | 56 | Wife | — | Sweden |
| 28 | Ada Rick | 61 | Head | — | Iowa |
| 29 | Wilson P. Welcher | 20 | Grand-son | Clerk | Colorado |
| 30 | William Rick Welcher | 17 | Grand-son | — | Wyoming |
| 31 | Thorne Neal | 29 | Head | Baker | Missouri |
| 32 | Evelyn Neal | 22 | Wife | — | Montana |
| 33 | Robert Neal | 5 | Son | — | Colorado |
| 34 | Clarence Barton | 49 | Head | Machinist | Nebraska |
| 35 | Sara Barton | 46 | Wife | — | South Dakota |
| 36 | Bernice Belgum | 24 | daughter | Clerk | Oklahoma |
| 37 | Wayne Belgum | 25 | son-in-law | — | Colorado |
| 38 | R. D. Sutton | 38 | Head | Salesman | Nebraska |
| 39 | Lillian Sutton | 30 | Wife | — | Oklahoma |
| 40 | Dagmar Sutton | 13 | Son | — | Colorado |
Pedigree Summary
James
Gen 1 · 5 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)