NC
Nellie Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Iowa
Our Model Tree links this Nellie Clark across the 1930 and 1940 US Censuses in Marion-County, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 9-person household.
Age 15
b. ~1925
Female
Daughter
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Iowa |
| Surname | Clark |
| Given Name | Nellie Mae |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Highest Grade | Hs 1 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Perry Twp |
| Est. Birth Year | ~1925 |
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 Nellie | Age | Birth yr |
|---|---|---|---|---|
| Nellie Clark | Daughter | — | 15 | ~1925 |
| Arlo Clark | Head | — | 42 | ~1898 |
| Alvis Clark | Son | — | 6 | ~1934 |
| Harley Clark | Son | — | 17 | ~1923 |
| Peter Clark | Son | — | 14 | ~1926 |
| Dean Clark | Son | — | 9 | ~1931 |
| Donald Clark | Son | — | 19 | ~1921 |
| John Clark | Son | — | 11 | ~1929 |
| Beulah Clark | Spouse | — | 41 | ~1899 |
Census Appearances
1930
Marion, Iowa
Daughter, age 5
Marion, Iowa · implied b. ~1925 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Nellie M |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Marion-County, Iowa
Daughter, age 15
Marion-County, Iowa · implied b. ~1925 — 9 household members
| Surname | Clark |
| Given Name | Nellie Mae |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Marion |
| Highest Grade | Hs 1 |
| 1935 Residence | Iowa |
| 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 Nellie Clark across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Nellie Clark
Daughter · 1940 · age 15 · b. ~1925 · Iowa
★ You are viewing this record
Sibling
John Clark
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dean Clark
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harley Clark
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alvis Clark
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Clark
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Peter Clark
Sibling · 1940 · age 14
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 — Marion-County, Iowa
Open full size
1940 US Federal Census — Marion-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01181-00640)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arlo T. Clark | 42 | Head | Miner | Iowa |
| 2 | Beulah Mae Clark | 41 | Wife | — | Iowa |
| 3 | Donald C. Clark | 19 | Son | — | Iowa |
| 4 | Harley O. Clark | 17 | Son | — | Iowa |
| 5 | Nellie Mae Clark THIS PERSON | 15 | Daughter | — | Iowa |
| 6 | Peter D. Clark | 14 | Son | — | Iowa |
| 7 | John Wayne Clark | 11 | Son | — | Iowa |
| 8 | Dean Gayle Clark | 9 | Son | — | Iowa |
| 9 | Alvis Ray Clark | 6 | Son | — | Iowa |
| 10 | Jesse Cunningham | 52 | Head | Farmer | Iowa |
| 11 | Jack Daniels | 54 | Head | Laborer | England |
| 12 | Benjamin Buckingham | 52 | Head | Farmer | Iowa |
| 13 | Blanche Buckingham | 43 | Wife | — | Ill |
| 14 | Ralph B. Buckingham | 25 | Son | Farmer | Iowa |
| 15 | Ida Mae Buckingham | 20 | Daughter | — | Iowa |
| 16 | Orville Wayne Buckingham | 16 | Son | — | Iowa |
| 17 | John Calyn | 43 | Head | Farmer | Iowa |
| 18 | Irene Mildred Calyn | 39 | Wife | — | Iowa |
| 19 | Robert William Calyn | 16 | Son | — | Iowa |
| 20 | Carroll Ritzhaupt | 35 | Head | Farmer | Iowa |
| 21 | Delores Ritzhaupt | 33 | Wife | — | Iowa |
| 22 | Herman Calyn | 39 | Head | Farmer | Iowa |
| 23 | Ida Calyn | 36 | Wife | — | Iowa |
| 24 | Harold W. Jordan | 21 | Head | Farmer | Iowa |
| 25 | Thelma Jordan | 18 | Wife | — | Iowa |
| 26 | C. F. Vaning | 50 | Head | Barker | Iowa |
| 27 | Clara Vaning | 45 | Wife | — | Iowa |
| 28 | Charles Junior Vaning | 13 | Son | — | Iowa |
| 29 | Della Kennedy | 62 | Head | Housewife | Iowa |
| 30 | Ora T. Kennedy | 28 | Son | Helper | Iowa |
| 31 | Emily Ann Powell | 79 | Mother | — | Kentucky |
| 32 | Thomas Fawcett | 37 | Head | Mechanic | Iowa |
| 33 | Freda Fawcett | 34 | Wife | Teacher | Iowa |
| 34 | Charles Baker | 60 | Head | Farmer | Iowa |
| 35 | Ed M. Baker | 54 | Brother | Farmer | Iowa |
| 36 | James M. Baker | 36 | Nephew | Farmer | Iowa |
| 37 | Clarence R. Wilson | 29 | Head | Farmer | Iowa |
| 38 | Irene Wilson | 21 | Wife | — | South Dakota |
| 39 | Walter Arlin Wilson | 2 | Son | — | Iowa |
| 40 | Cameron R. Hughes | 33 | Head | Farmer | 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)