EC
Eugene Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Linn-County, Iowa
Our Model Tree links this Eugene Clark across the 1930 and 1940 US Censuses in Linn-County, Iowa (XGBoost, ~Confirmed) — first a son (b.~1923), then head of a 7-person household.
Age 17
b. ~1923
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Linn-County, Iowa |
| Surname | Clark |
| Given Name | Eugene O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Franklin township |
| 1935 Residence (County) | Linn |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Franklin Township |
| Est. Birth Year | ~1923 |
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 Eugene | Age | Birth yr |
|---|---|---|---|---|
| Eugene Clark | Son | — | 17 | ~1923 |
| Bonnie Clark | Daughter | — | 2 | ~1938 |
| Ross Clark | Head | — | 47 | ~1893 |
| Wayne Clark | Son | — | 21 | ~1919 |
| Laura Clark | Spouse | — | 45 | ~1895 |
| Howard Clark | Son | — | ~1940 | |
| Margaret Clark | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Linn, Iowa
Son, age 7
Linn, Iowa · implied b. ~1923 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Eugene O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Linn-County, Iowa
Son, age 17
Linn-County, Iowa · implied b. ~1923 — 7 household members
| Surname | Clark |
| Given Name | Eugene O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Franklin township |
| 1935 Residence (County) | Linn |
| Income (1939) | 0 |
| Highest Grade | Hs 1 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 17 · b. ~1923 · Iowa
★ You are viewing this record
Sibling
Margaret Clark
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bonnie Clark
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Wayne Clark
Sibling · 1940 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Clark
Sibling · 1940 · age
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 — Linn-County, Iowa
Open full size
1940 US Federal Census — Linn-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01175-00331)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John Blinks | 10 | Son | — | Iowa |
| 2 | Joan Blinks | 9 | daughter | — | Iowa |
| 3 | Ray A Blessing | 59 | head | Farmer | Iowa |
| 4 | Hattie Blessing | 55 | wife | — | Iowa |
| 5 | Margaret Blessing | 80 | mother | — | Iowa |
| 6 | John W Reyhans | 39 | head | Farmer | Iowa |
| 7 | Lenora Reyhans | 31 | wife | — | Iowa |
| 8 | Kenneth Reyhans | 10 | Son | — | Iowa |
| 9 | Richard Reyhans | 8 | Son | — | Iowa |
| 10 | Gerald Reyhans | 4 | Son | — | Iowa |
| 11 | Gilbert Lorance | 43 | hired man | Farm Hand | Iowa |
| 12 | Jennie Petrick | 41 | head | — | Austria |
| 13 | George Petrick | 22 | Son | Farmer | Iowa |
| 14 | Ross Clark | 47 | head | Farmer | Iowa |
| 15 | Laura E. Clark | 45 | wife | — | Iowa |
| 16 | Wayne D. Clark | 21 | Son | Co-Farmer | Iowa |
| 17 | Eugene O. Clark THIS PERSON | 17 | Son | — | Iowa |
| 18 | Margaret E. Clark | 12 | daughter | — | Iowa |
| 19 | Bonnie Lou Clark | 2 | daughter | — | Iowa |
| 20 | Howard R. Clark | 0 | Son | — | Iowa |
| 21 | Jacob H. Clark | 23 | head | Farm Hand | Iowa |
| 22 | Marcella E. Clark | 21 | wife | — | Iowa |
| 23 | Myrtle J. Clark | 1 | daughter | — | Iowa |
| 24 | Richard Leo Clark | 0 | Son | — | Iowa |
| 25 | George Henik | 39 | head | Farmer | Iowa |
| 26 | Julia Henik | 41 | wife | — | Iowa |
| 27 | Donald Henik | 11 | Son | — | Iowa |
| 28 | Frank W Blinks | 72 | head | — | Illinois |
| 29 | Sarah Blinks | 70 | wife | — | Iowa |
| 30 | Earl Whitman | 32 | head | Farm Hand | Iowa |
| 31 | Mabel Whitman | 31 | wife | — | Iowa |
| 32 | Clair Whitman | 8 | Son | — | Iowa |
| 33 | Arlo Whitman | 6 | Son | — | Iowa |
| 34 | Dorothy Whitman | 3 | daughter | — | Illinois |
| 35 | Kenneth Whitman | 1 | Son | — | Iowa |
| 36 | Theodore Light | 38 | head | Farmer | Iowa |
| 37 | Olive Light | 29 | wife | — | Iowa |
| 38 | William Reimer | 54 | head | Farmer | Illinois |
| 39 | Lulu Reimer | 45 | wife | — | Iowa |
| 40 | Maxine L Reimer | 17 | daughter | — | Iowa |
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)