PC
Paul Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Johnson-County, Iowa
Our Model Tree links this Paul Clark across the 1920, 1930 and 1940 US Censuses in Johnson-County, Iowa (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1909), then head of a 4-person household.
Age 31
b. ~1909
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Iowa |
| Surname | Clark |
| Given Name | Paul A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | IOWA CITY |
| 1935 Residence (County) | JOHNSON |
| Additional Details | |
| Occupation | Laborer |
| Industry | Misc |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 200 |
| Highest Grade | C 3 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Laborer |
| Township / Ward | Iowa City |
| Est. Birth Year | ~1909 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Paul | Age | Birth yr |
|---|---|---|---|---|
| Paul Clark | Son | — | 31 | ~1909 |
| Mona Clark | Daughter | — | 39 | ~1901 |
| Mary Clark | Spouse | — | 66 | ~1874 |
| James Clark | Head | — | 61 | ~1879 |
Census Appearances
1920
Johnson, Iowa
Son, age 12
Johnson, Iowa · implied b. ~1908 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Paul A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Johnson, Iowa
Son, age 22
Johnson, Iowa · implied b. ~1908 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Paul A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Home Owned/Rented | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Johnson-County, Iowa
Son, age 31
Johnson-County, Iowa · implied b. ~1909 — 4 household members
| Surname | Clark |
| Given Name | Paul A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | IOWA CITY |
| 1935 Residence (County) | JOHNSON |
| Occupation | Laborer |
| Industry | Misc |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 200 |
| Highest Grade | C 3 |
| 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 Paul Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Clark (~0.92 confidence) and father James Clark (~0.92 confidence) and mother Mary Clark (~0.92 confidence) and mother Mary Clark (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Clark
b. ~1880
Source father
● Household
· direct · ~0.92
Father
James Clark
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Mary Clark
b. ~1874
Source mother
● Household
· direct · ~0.92
Mother
Mary Clark
b. ~1875
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Paul Clark
Son · 1940 · age 31 · b. ~1909 · Iowa
★ You are viewing this record
Sibling
Mona Clark
Sibling · 1940 · age 39
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 — Johnson-County, Iowa
Open full size
1940 US Federal Census — Johnson-County, Iowa
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01171-00258)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | George J. Slattery | 28 | Head | Clerk | Iowa |
| 42 | Catherine Slattery | 24 | Wife | — | Iowa |
| 43 | Shirley Slattery | 4 | Daughter | — | Iowa |
| 44 | Kathleen Slattery | 1 | Daughter | — | Iowa |
| 45 | George Yoder | 31 | Head | — | Illinois |
| 46 | Florence Yoder | 22 | Wife | — | Michigan |
| 47 | Francis Bowers | 34 | Head | Manager | Iowa |
| 48 | Charles Goger | 77 | Lodger | — | Iowa |
| 49 | John Bowers | 72 | Lodger | — | Iowa |
| 51 | James F. Hogan | 60 | Head | Clerk | Iowa |
| 52 | Clara Hogan | 55 | Wife | — | Iowa |
| 53 | Catherine Aussick | 30 | Daughter | Tel. Operator | Iowa |
| 54 | Helen Hogan | 28 | Daughter | Secretary | Iowa |
| 55 | Jane Hogan | 20 | Daughter | Secretary | Iowa |
| 56 | Jean Riddick | 25 | In-law | Clerk | Iowa |
| 57 | Ella F. Dunlap | 73 | Head | — | Iowa |
| 58 | Genevieve Dunlap | 53 | Daughter | — | Iowa |
| 59 | George Dunlap | 52 | Son | — | Iowa |
| 60 | Helen Dunlap | 33 | Daughter | Secretary | Iowa |
| 61 | Mary C. Donohue | 49 | Head | — | Iowa |
| 62 | Patrick Donohue | 82 | Father | — | Iowa |
| 63 | Joe Clair | 38 | Lodger | Laborer | Iowa |
| 64 | Catherine Hurley | 72 | Head | — | Iowa |
| 65 | Margaret Whalen | 78 | Head | — | Iowa |
| 66 | George H. Cooper | 59 | Head | Carpenter | Iowa |
| 67 | James J. Clark | 61 | Head | Fire Chief | Iowa |
| 68 | Mary Clark | 66 | Wife | — | Iowa |
| 69 | Mona Clark | 39 | Daughter | Secretary | Iowa |
| 70 | Paul A. Clark THIS PERSON | 31 | Son | Laborer | Iowa |
| 71 | Julia Riley | 65 | Head | — | Iowa |
| 72 | John B. Riley | 55 | Brother | — | Iowa |
| 73 | William Jackson | 39 | Nephew | Lawyer | Iowa |
| 75 | Richard Gregh | 91 | Head | — | Ireland |
| 76 | Margaret Gregh | 78 | Wife | — | Ireland |
| 77 | Katherine Kennedy | 68 | Head | — | Ireland |
| 78 | Norwood Bothell | 55 | Head | Farmer | Iowa |
| 79 | Rose Bothell | 53 | Wife | — | Iowa |
| 80 | Mary Bothell | 19 | Daughter | Clerk | Iowa |
Pedigree Summary
Paul + 1 sibling
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)