EC
Eugene Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Weld-County, Colorado
Our Model Tree links this Eugene Clark across the 1930 and 1940 US Censuses in Weld-County, Colorado (XGBoost, ~Confirmed) — first a son (b.~1927), then head of a 8-person household.
Age 13
b. ~1927
Male
Son
Born: Colorado
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Weld-County, Colorado |
| Surname | Clark |
| Given Name | Eugene |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Weld |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Township / Ward | Precinct 49 |
| 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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Eugene | Age | Birth yr |
|---|---|---|---|---|
| Neal Clark | Son | — | 9 | ~1931 |
| Clarence Clark | Son | — | 6 | ~1934 |
| Ethel Clark | Spouse | — | 43 | ~1897 |
| James Clark | Son | — | 16 | ~1924 |
| Eugene Clark | Son | — | 13 | ~1927 |
| Carroll Clark | Son | — | 19 | ~1921 |
| J Clark | Head | — | 46 | ~1894 |
| Biford Clark | Son | — | 11 | ~1929 |
Census Appearances
1930
Weld, Colorado
Son, age 3
Weld, Colorado · implied b. ~1927 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Eugene |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Nebraska |
| Mother's Birthplace | Colorado |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Weld-County, Colorado
Son, age 13
Weld-County, Colorado · implied b. ~1927 — 8 household members
| Surname | Clark |
| Given Name | Eugene |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Colorado |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Weld |
| Highest Grade | No 5 |
| 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 Eugene Clark across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Eugene Clark
Son · 1940 · age 13 · b. ~1927 · Colorado
★ You are viewing this record
Sibling
James Clark
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Neal Clark
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Carroll Clark
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clarence Clark
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Biford Clark
Sibling · 1940 · age 11
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 — Weld-County, Colorado
Open full size
1940 US Federal Census — Weld-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00482-00481)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Thomas Muraya | 55 | Head | Farmer | Japan |
| 42 | Joseph Dradovich | 31 | Head | Farmer | Colorado |
| 43 | Erna Dradovich | 26 | Wife | — | Colorado |
| 44 | Larry Dradovich | 1 | Son | — | Colorado |
| 45 | Carol Dradovich | 0 | Daughter | — | Colorado |
| 46 | Alexander Ehrlich | 30 | Head | Farmer | Russia |
| 47 | Eva Ehrlich | 28 | Wife | — | Russia |
| 48 | Allen A. Ehrlich | 2 | Son | — | Colorado |
| 49 | Glenn Scott | 24 | Head | Laborer | Oklahoma |
| 50 | Marjorie Scott | 22 | Wife | — | Colorado |
| 51 | Kenneth Scott | 1 | Son | — | Colorado |
| 52 | Joseph L. Eaton | 48 | Head | Farmer | Missouri |
| 53 | Nellie M. Eaton | 47 | Wife | — | Missouri |
| 54 | James L. Eaton | 11 | Son | — | Colorado |
| 55 | John D. Eaton | 9 | Son | — | Colorado |
| 56 | Librado Herrera | 45 | Head | Laborer | New Mexico |
| 57 | Jennie Herrera | 50 | Wife | — | New Mexico |
| 58 | Frank Herrera | 20 | Son | Laborer | New Mexico |
| 59 | Arminda Herrera | 17 | Daughter | New Worker | New Mexico |
| 60 | Armina Herrera | 14 | Daughter | New Worker | New Mexico |
| 61 | Geneva Dominguez | 23 | Sister | — | New Mexico |
| 62 | Josephine Dominguez | 7 | Niece | — | New Mexico |
| 63 | Vincent Dominguez | 5 | Nephew | — | New Mexico |
| 64 | Tiburcio Dominguez | 3 | Nephew | — | New Mexico |
| 65 | Mary Herrera | 28 | Sister | — | New Mexico |
| 66 | Minnie Herrera | 6 | Niece | — | New Mexico |
| 67 | Pascal Herrera | 3 | Nephew | — | New Mexico |
| 68 | Clarence Rhoadarmer | 32 | Head | Farmer | Nebraska |
| 69 | Marian Rhoadarmer | 26 | Wife | — | Ohio |
| 70 | J. Hinton Clark | 46 | Head | Farmer | Nebraska |
| 71 | Ethel Clark | 43 | Wife | — | Colorado |
| 72 | Carroll Clark | 19 | Son | — | Colorado |
| 73 | James Clark | 16 | Son | — | Colorado |
| 74 | Eugene Clark THIS PERSON | 13 | Son | — | Colorado |
| 75 | Biford Clark | 11 | Son | — | Colorado |
| 76 | Neal Clark | 9 | Son | — | Colorado |
| 77 | Clarence Clark | 6 | Son | — | Colorado |
| 78 | Milton Robinson | 60 | Head | Farmer | Missouri |
| 79 | Minnie H. Robinson | 63 | Wife | — | Missouri |
| 80 | David Hobber | 20 | Head | Laborer | Missouri |
Related Census Records
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)