JP
James Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Worth-County, Iowa
Our Model Tree links this James Peterson across the 1920, 1930 and 1940 US Censuses in Worth-County, Iowa (XGBoost, ~Confirmed), with identified parents Tilla & Vella — first a son (b.~1910), then head of a 5-person household.
Age 30
b. ~1910
Male
Son
Born: Iowa
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Worth-County, Iowa |
| Surname | Peterson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Bristol twp |
| 1935 Residence (County) | Worth |
| Additional Details | |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 30 |
| Highest Grade | No 5 |
| 1935 Residence | Same house |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farm Laborer |
| Township / Ward | Bristol Twp |
| 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Nora Peterson | Daughter | — | 25 | ~1915 |
| George Peterson | Head | — | 58 | ~1882 |
| James Peterson | Son | — | 30 | ~1910 |
| Alton Peterson | Son | — | 24 | ~1916 |
| Tilla Peterson | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Worth, Iowa
Son, age 10
Worth, Iowa · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Worth, Iowa
Son, age 20
Worth, Iowa · implied b. ~1910 — 37 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Norway |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Worth-County, Iowa
Son, age 30
Worth-County, Iowa · implied b. ~1910 — 5 household members
| Surname | Peterson |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Single |
| Birthplace | Iowa |
| 1935 Residence (City) | Bristol twp |
| 1935 Residence (County) | Worth |
| Occupation | Farm laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 30 |
| Highest Grade | No 5 |
| 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 James Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Tilla Peterson (~0.92 confidence) and mother Vella Peterson (~0.92 confidence) and father George Peterson (~0.92 confidence) and father George Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Tilla Peterson
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Vella Peterson
b. ~1878
Source mother
● Household
· direct · ~0.92
Father
George Peterson
b. ~1882
Source father
● Household
· direct · ~0.92
Father
George Peterson
b. ~1882
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Peterson
Son · 1940 · age 30 · b. ~1910 · Iowa
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Sibling
Alton Peterson
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nora Peterson
Sibling · 1940 · age 25
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 — Worth-County, Iowa
Open full size
1940 US Federal Census — Worth-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01217-00045)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | James Adams | 17 | Son | Scholar | Iowa |
| 2 | Blanche Adams | 14 | Daughter | — | Iowa |
| 3 | Donald Adams | 12 | Son | — | Iowa |
| 4 | Claude Reynard | 26 | Hired Man | Farm Laborer | Kentucky |
| 5 | Gilmer Peterson | 32 | Head | Farm Operator | Minnesota |
| 6 | Nina Peterson | 28 | Wife | — | Iowa |
| 7 | Darwin Peterson | 2 | Son | — | Iowa |
| 8 | Gudren Skogen | 42 | Head | Farm Operator | Iowa |
| 9 | Lucille Skogen | 31 | Wife | — | Iowa |
| 10 | Charles Skogen | 5 | Son | — | Iowa |
| 11 | Gwendolyn Skogen | 4 | Daughter | — | Iowa |
| 12 | Marian Skogen | 2 | Daughter | — | Iowa |
| 13 | Gerald Skogen | 2 | Son | — | Iowa |
| 14 | Lloyd Bjelland | 32 | Head | Farm Operator | Iowa |
| 15 | Arline Bjelland | 27 | Wife | — | Iowa |
| 16 | Bonnie Bjelland | 6 | Daughter | — | Iowa |
| 17 | Marvel Bjelland | 5 | Daughter | — | Iowa |
| 18 | Russel Field | 21 | Hired Man | Farm Laborer | Iowa |
| 19 | Adolph Winden | 43 | Head | Farm Operator | Iowa |
| 20 | Minnie Winden | 39 | Wife | — | Iowa |
| 21 | Marvin Winden | 15 | Son | — | Iowa |
| 22 | Wallace Winden | 12 | Son | — | Iowa |
| 23 | Richard Winden | 2 | Son | — | Iowa |
| 24 | George Bakken | 38 | Head | Farm Operator | Iowa |
| 25 | Emma Bakken | 38 | Wife | — | Iowa |
| 26 | Leslie Bakken | 13 | Son | — | Iowa |
| 27 | George Peterson | 58 | Head | Farm Operator | Iowa |
| 28 | Tilla Peterson | 62 | Wife | — | Norway |
| 29 | Alton Peterson | 24 | Son | Farm Operator | Iowa |
| 30 | James Peterson THIS PERSON | 30 | Son | Farm Laborer | Iowa |
| 31 | Nora Peterson | 25 | Daughter | — | Iowa |
| 32 | Abel Reinerson | 42 | Head | Farm Operator | Iowa |
| 33 | Louella Reinerson | 43 | Wife | — | Iowa |
| 34 | Agnes Reinerson | 15 | Daughter | — | Iowa |
| 35 | Dorothy Reinerson | 14 | Daughter | — | Iowa |
| 36 | Helen Reinerson | 11 | Daughter | — | Iowa |
| 37 | Caroline Reinerson | 9 | Daughter | — | Iowa |
| 38 | Emil L. Anderson | 64 | Head | Farm Operator | Iowa |
| 39 | Mary Anderson | 57 | Wife | — | Denmark |
| 40 | Oscar Johnson | 43 | Head | Farm Laborer | Minnesota |
Pedigree Summary
James + 2 siblings
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)