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Harold Davis — 1940 US Census Record
Model Tree available1940 United States Federal Census · Jasper-County, Iowa
Our Model Tree links this Harold Davis across the 1920, 1930 and 1940 US Censuses in Jasper-County, Iowa (XGBoost, ~Confirmed), with identified parents Charles & Charles — first a head (b.~1910), then head of a 4-person household.
Age 30
b. ~1910
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Jasper-County, Iowa |
| Surname | Davis |
| Given Name | Harold L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Newton City |
| 1935 Residence (County) | Jasper County |
| Additional Details | |
| Occupation | Machinist |
| Industry | Factory |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 1000 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Machinist |
| Township / Ward | Newton City |
| Est. Birth Year | ~1910 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Mary Bickett | Daughter | — | 10 | ~1930 |
| Barbara Bickett | Daughter | — | 13 | ~1927 |
| Harold Davis | Head | — | 30 | ~1910 |
| Grace Davis | Spouse | — | 33 | ~1907 |
Census Appearances
1920
Jasper, Iowa
Son, age 9
Jasper, Iowa · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Harold E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| 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
Jasper, Iowa
Son, age 20
Jasper, Iowa · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Davis |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Jasper-County, Iowa
Head, age 30
Jasper-County, Iowa · implied b. ~1910 — 4 household members
| Surname | Davis |
| Given Name | Harold L. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Newton City |
| 1935 Residence (County) | Jasper County |
| Occupation | Machinist |
| Industry | Factory |
| Class of Worker | PW |
| Hours Worked | 56 |
| Income (1939) | 1000 |
| Highest Grade | Hs 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 Harold Davis across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Davis (~0.92 confidence) and father Charles Davis (~0.92 confidence) and mother Alice Davis (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Davis
b. ~1870
Source father
● Household
· direct · ~0.92
Father
Charles Davis
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Alice Davis
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Davis
Head · 1940 · age 30 · b. ~1910 · 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 — Jasper-County, Iowa
Open full size
1940 US Federal Census — Jasper-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01169-00675)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Tom A. Wake | 48 | Head | Asst. Agent | Iowa |
| 2 | Grace B. Wake | 47 | Wife | Housewife | Iowa |
| 3 | Tommie J. Wake | 11 | Son | — | Iowa |
| 4 | Don R. Kinler | 24 | Lodger | Salesman | Iowa |
| 5 | Louise Kinler | 19 | Lodger | — | Iowa |
| 6 | Billie R. Lewis | 20 | Lodger | Armature Winder | Iowa |
| 7 | Rudolph W. Moe | 41 | Head | Asst. Mgr. | Minnesota |
| 8 | Hattie Ann Moe | 33 | Wife | — | Minnesota |
| 9 | Jean May Moe | 9 | Daughter | — | Minnesota |
| 10 | Barbara Kay Moe | 5 | Daughter | — | Minnesota |
| 11 | John W. Havens | 56 | Head | Laborer | Iowa |
| 12 | Ruth A. Havens | 43 | Wife | — | Missouri |
| 13 | Jack Gross | 14 | Son | — | Illinois |
| 14 | Richard Gross | 9 | Son | — | Iowa |
| 15 | M. C. Brown | 76 | Head | Retired | Scotland |
| 16 | Jean Brown | 43 | Daughter | Deputy Auditor | Wisconsin |
| 17 | Anna Swihart | 76 | Head | — | Wisconsin |
| 18 | Jean Swihart | 15 | Granddaughter | — | New York |
| 19 | George A. Vaughn | 56 | Head | Mechanical Engineer | Pennsylvania |
| 20 | Bessie Marie Vaughn | 56 | Wife | — | Pennsylvania |
| 21 | Arthur Hayler | 55 | Head | Mechanical Engineer | Iowa |
| 22 | Fredora Hayler | 53 | Wife | — | Iowa |
| 23 | Louise Hayler | 23 | Daughter | Stenographer | Iowa |
| 24 | Frank Hayler | 18 | Son | — | Iowa |
| 25 | Harold L. Davis THIS PERSON | 30 | Head | Machinist | Iowa |
| 26 | Grace A. Davis | 33 | Wife | — | Minnesota |
| 27 | Barbara Bickett | 13 | Daughter | — | Iowa |
| 28 | Mary Helen Bickett | 10 | Daughter | — | Iowa |
| 29 | Dan Masters | 49 | Head | Barber | Illinois |
| 30 | Ethelyn Masters | 50 | Wife | — | Iowa |
| 31 | Maurice Masters | 17 | Son | — | Iowa |
| 32 | Merlin J. Willis | 39 | Lodger | Printing | Iowa |
| 33 | Joe Sraykovsky | 20 | Lodger | Salesman | Minnesota |
| 34 | L. Paul Anderson | 33 | Head | Art Teacher | Illinois |
| 35 | Irene Anderson | 31 | Wife | — | Iowa |
| 36 | David Bruce Anderson | 4 | Son | — | Iowa |
| 37 | T. Harry Upton | 41 | Head | Mill Room Foreman | Iowa |
| 38 | Maria Upton | 39 | Wife | — | Iowa |
| 39 | Rosemary Upton | 13 | Daughter | — | Iowa |
| 40 | Tommie Upton | 9 | Son | — | Iowa |
Pedigree Summary
Harold
Gen 1 · 3 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)