EC
Eva Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marshall-County, Iowa
Our Model Tree links this Eva Clark across the 1920, 1930 and 1940 US Censuses in Marshall-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1899), then head of a 9-person household.
Age 41
b. ~1899
Female
Spouse
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marshall-County, Iowa |
| Surname | Clark |
| Given Name | Eva |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Marshalltown |
| 1935 Residence (County) | Marshall |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Marshalltown |
| Est. Birth Year | ~1899 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Eva | Age | Birth yr |
|---|---|---|---|---|
| Carroll Clark | Son | — | 12 | ~1928 |
| Thomas Clark | Head | — | 48 | ~1892 |
| Eva Clark | Spouse | — | 41 | ~1899 |
| Blythe Clark | Daughter | — | 15 | ~1925 |
| Vern Clark | Son | — | 19 | ~1921 |
| George Clark | Son | — | 17 | ~1923 |
| Josephine Clark | Daughter | — | 22 | ~1918 |
| Terry Clark | Son | — | 5 | ~1935 |
| Mattie Clark | Other | — | 65 | ~1875 |
Census Appearances
1920
Marshall, Iowa
Spouse, age 21
Marshall, Iowa · implied b. ~1899 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Eva B. |
| Relationship to Head | wife |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Marshall, Iowa
Other, age 31
Marshall, Iowa · implied b. ~1899 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Eva |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Minnesota |
| Age at First Marriage | 17 |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Marshall-County, Iowa
Spouse, age 41
Marshall-County, Iowa · implied b. ~1899 — 9 household members
| Surname | Clark |
| Given Name | Eva |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Marshalltown |
| 1935 Residence (County) | Marshall |
| Highest Grade | Hs 1 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Eva Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Eva Clark
Spouse · 1940 · age 41 · b. ~1899 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Marshall-County, Iowa
Open full size
1940 US Federal Census — Marshall-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01182-00349)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Theodore Bochwald | 72 | Father | — | Iowa |
| 42 | James Bochwald | 19 | Son | Plumbing | Iowa |
| 43 | Frank Milberg | 50 | Head | Pressman | Iowa |
| 44 | Harold Kohn | 35 | Head | Labor | Iowa |
| 45 | Wilma Kohn | 34 | Wife | — | Iowa |
| 46 | Elmer Bradley | 31 | Head | Beer Salesman | Iowa |
| 47 | Doris Bradley | 25 | Wife | — | Iowa |
| 48 | Beverly Bradley | 3 | Daughter | — | Iowa |
| 49 | Ray Cross | 42 | Head | Machinist | Iowa |
| 50 | Mabel Cross | 45 | Wife | — | England |
| 51 | Audrey Cross | 16 | Daughter | — | Iowa |
| 52 | Edward Cross | 9 | Son | — | Iowa |
| 53 | John Robbe | 60 | Head | Proprietor | Iowa |
| 54 | Jessie Robbe | 60 | Wife | — | Iowa |
| 55 | Maxine Robbe | 31 | Daughter | Bookkeeper | Iowa |
| 56 | Louis Jean Robbe | 17 | Daughter | — | Iowa |
| 57 | Edmund Cobsey | 82 | Head | — | Georgia |
| 58 | Anna Cobsey | 80 | Wife | — | Denmark |
| 59 | Thomas Clark | 48 | Head | Maintenance Man | Iowa |
| 60 | Eva Clark THIS PERSON | 41 | Wife | — | Minnesota |
| 61 | Josephine Clark | 22 | Daughter | Bookkeeper | Iowa |
| 62 | Vern Clark | 19 | Son | Labor | Iowa |
| 63 | George Clark | 17 | Son | — | Iowa |
| 64 | Blythe Clark | 15 | Daughter | — | Iowa |
| 65 | Carroll Clark | 12 | Son | — | Iowa |
| 66 | Terry Clark | 5 | Son | — | Iowa |
| 67 | Mattie Clark | 65 | Mother | — | Iowa |
| 68 | Walter Lamer | 36 | Head | Cooler Man | Iowa |
| 69 | Bernice Lamer | 33 | Wife | — | Iowa |
| 70 | Paul Klemme | 50 | Head | Labor | Iowa |
| 71 | Ella Klemme | 45 | Wife | — | Iowa |
| 72 | Darrell Klemme | 5 | Son | — | Iowa |
| 73 | Alfred Bunn | 33 | Head | Electric Welder | Iowa |
| 74 | Edith Bunn | 31 | Wife | — | Iowa |
| 75 | David Bunn | 2 | Son | — | Iowa |
| 76 | August Wessing | 80 | Head | — | Germany |
| 77 | Lulu Wessing | 61 | Wife | — | Iowa |
| 78 | Mabel Bender | 57 | Head | — | Iowa |
| 79 | Pauline Boswell | 27 | Wife | Beauty Operator | Iowa |
| 80 | Hannah Brown | 30 | Head | Registered Private Nurse | Iowa |
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)