FC
Francis Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Warren-County, Iowa
Our Model Tree links this Francis Clark across the 1920, 1930 and 1940 US Censuses in Warren-County, Iowa (XGBoost, ~Confirmed), with identified parents Ella & A — first a daughter (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Female
Daughter
Born: Iowa
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Warren-County, Iowa |
| Surname | Clark |
| Given Name | Francis |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Belmont Twp |
| 1935 Residence (County) | Warren |
| Additional Details | |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 34 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Teacher |
| Township / Ward | Belmont Twp |
| Est. Birth Year | ~1914 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Francis | Age | Birth yr |
|---|---|---|---|---|
| Ella Oldaker | Spouse | — | 62 | ~1878 |
| A Oldaker | Head | — | 58 | ~1882 |
| Francis Clark | Daughter | — | 26 | ~1914 |
Census Appearances
1920
Warren, Iowa
Daughter, age 5
Warren, Iowa · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Francis |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
Daughter, age 15
Warren, Iowa · implied b. ~1915 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Frances E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Warren-County, Iowa
Daughter, age 26
Warren-County, Iowa · implied b. ~1914 — 3 household members
| Surname | Clark |
| Given Name | Francis |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Widowed |
| Birthplace | Iowa |
| 1935 Residence (City) | Belmont Twp |
| 1935 Residence (County) | Warren |
| Occupation | Teacher |
| Industry | Public School |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 34 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| 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 Francis Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Ella Oldaker (~0.92 confidence) and father A Oldaker (~0.92 confidence) and father Leslie Clark (~0.92 confidence) and mother Hazel Clark (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Ella Oldaker
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
A Oldaker
b. ~1882
Source father
● Household
· direct · ~0.92
Father
Leslie Clark
b. ~1883
Source father
● Household
· direct · ~0.92
Mother
Hazel Clark
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Francis Clark
Daughter · 1940 · age 26 · b. ~1914 · Iowa
★ 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 — Warren-County, Iowa
Open full size
1940 US Federal Census — Warren-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01210-00070)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Robt Morrison | 23 | Head | Farmer | Iowa |
| 42 | Cleo Morrison | 30 | Wife | — | Iowa |
| 43 | Linda Morrison | 1 | Daughter | — | Iowa |
| 44 | John Grewbel | 48 | Head | Farmer | Iowa |
| 45 | Mary Grewbel | 45 | Wife | — | Iowa |
| 46 | Alkis Grewbel | 20 | Son | Laborer | Iowa |
| 47 | Loraine Grewbel | 18 | Daughter | — | Iowa |
| 48 | Fred Grewbel | 14 | Son | — | Iowa |
| 49 | Marjorie Grewbel | 8 | Daughter | — | Iowa |
| 50 | Mary Stall | 1 | Relic | — | Iowa |
| 51 | A. N. Oldaker | 58 | Head | Farmer | Iowa |
| 52 | Ella Oldaker | 62 | Wife | — | Iowa |
| 53 | Francis Clark THIS PERSON | 26 | Daughter | Teacher | Iowa |
| 54 | W. H. Oldaker | 21 | Head | Hired Hand | Iowa |
| 55 | Eillen Oldaker | 21 | Wife | — | Oklahoma |
| 56 | Lee Gibson | 44 | Head | Farmer | Iowa |
| 57 | Blanche Gibson | 45 | Wife | — | Iowa |
| 58 | Olive Gibson | 21 | Daughter | — | Iowa |
| 59 | Haye Gibson | 17 | Daughter | — | Iowa |
| 60 | Leland Gibson | 13 | Son | — | Iowa |
| 61 | Irene Gibson | 11 | Daughter | — | Iowa |
| 62 | Eleen Gibson | 9 | Daughter | — | Iowa |
| 63 | Donna Gibson | 3 | Daughter | — | Iowa |
| 64 | Wayne Miller | 18 | Hired Hand | Hired Hand | Iowa |
| 65 | David Melick | 49 | Head | Farmer | Iowa |
| 66 | Nora Melick | 33 | Wife | — | Iowa |
| 67 | Jane Melick | 80 | Mother | — | Iowa |
| 68 | R. L. Manley | 59 | Head | Farmer | Tennessee |
| 69 | Nora Manley | 59 | Wife | — | Iowa |
| 70 | Milton Manley | 18 | Son | Laborer | Iowa |
| 71 | Dorothy Manley | 17 | Daughter in law | — | Iowa |
| 72 | Howard Mosher | 34 | Head | Farmer | Iowa |
| 73 | Clara Mosher | 32 | Wife | — | Iowa |
| 74 | Joyce Mosher | 8 | Daughter | — | Iowa |
| 75 | Dan Mosher | 7 | Son | — | Iowa |
| 76 | Jay Mosher | 4 | Son | — | Iowa |
| 77 | Hather Mosher | 73 | Father | — | Iowa |
| 78 | Earl E. Smith | 49 | Head | Farmer | Iowa |
| 79 | Florence Smith | 45 | Wife | — | Iowa |
| 80 | Lyle Smith | 15 | Son | — | Iowa |
Related Census Records
Pedigree Summary
Francis
Gen 1 · 4 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)