HP
Harold Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Buchanan-County, Iowa
Our Model Tree links this Harold Peterson across the 1920, 1930 and 1940 US Censuses in Buchanan-County, Iowa (XGBoost, ~Confirmed), with identified parents Almus & Andrew — first a son (b.~1914), then head of a 5-person household.
Age 26
b. ~1914
Male
Son
Born: Illinois
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Buchanan-County, Iowa |
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Fremont twp. |
| 1935 Residence (County) | Buchanan |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 28 |
| Income (1939) | 88 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Laborer |
| Township / Ward | Fremont 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harold | Age | Birth yr |
|---|---|---|---|---|
| Darlene Ellebury | Other | — | 5 | ~1935 |
| Mary Peterson | Spouse | — | 55 | ~1885 |
| Harold Peterson | Son | — | 26 | ~1914 |
| Almus Peterson | Head | — | 56 | ~1884 |
| Marion Ellebury | Other | — | 4 | ~1936 |
Census Appearances
1920
Buchanan, Iowa
Son, age 6
Buchanan, Iowa · implied b. ~1914 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harold H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Germany |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Buchanan, Iowa
Son, age 16
Buchanan, Iowa · implied b. ~1914 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Buchanan-County, Iowa
Son, age 26
Buchanan-County, Iowa · implied b. ~1914 — 5 household members
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| 1935 Residence (City) | Fremont twp. |
| 1935 Residence (County) | Buchanan |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 28 |
| Income (1939) | 88 |
| Highest Grade | 8 |
| 1935 Residence | Same place |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Almus Peterson (~0.92 confidence) and father Andrew Peterson (~0.92 confidence) and mother Mary Peterson (~0.92 confidence) and mother Mary Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Almus Peterson
b. ~1884
Source father
● Household
· direct · ~0.92
Father
Andrew Peterson
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Mary Peterson
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Mary Peterson
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Peterson
Son · 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 — Buchanan-County, Iowa
Open full size
1940 US Federal Census — Buchanan-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01142-00669)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary A Connolly | 15 | Daughter | — | Iowa |
| 42 | John Connolly | 13 | Son | — | Iowa |
| 43 | Raymond Connolly | 11 | Son | — | Iowa |
| 44 | Stella M Connolly | 3 | Daughter | — | Iowa |
| 45 | James Connolly | 1 | Son | — | Iowa |
| 46 | Parnell Booth | 40 | Hired Hand | Laborer | Iowa |
| 47 | Keith Kelp | 33 | Head | Farmer | Iowa |
| 48 | Opal Kelp | 31 | Wife | — | Iowa |
| 49 | Darlene Kelp | 12 | Daughter | — | Iowa |
| 50 | Laurence Kelp | 62 | Head | Farmer | Iowa |
| 51 | Frances Kelp | 60 | Wife | — | Iowa |
| 52 | Gilbert Brentnall | 51 | Head | Farmer | Nebraska |
| 53 | Adena Brentnall | 50 | Wife | — | Iowa |
| 54 | Justin Brentnall | 26 | Son | Farmer | Iowa |
| 55 | Robert Brentnall | 16 | Son | — | Iowa |
| 56 | Ernest Husher | 40 | Head | Farmer | Illinois |
| 57 | Grace Husher | 38 | Wife | — | Nebraska |
| 58 | Jessie Husher | 17 | Daughter | — | Iowa |
| 59 | Donald Husher | 14 | Son | — | Iowa |
| 60 | Virginia Husher | 13 | Daughter | — | Iowa |
| 61 | Mardella Husher | 8 | Daughter | — | Iowa |
| 62 | Darlene Husher | 0 | Daughter | — | Iowa |
| 63 | Lucile Buck | 18 | Daughter | — | Iowa |
| 64 | George Buck | 23 | Son-in-law | Laborer | Iowa |
| 65 | Almus Peterson | 56 | Head | Farmer | Germany |
| 66 | Mary Peterson | 55 | Wife | — | Illinois |
| 67 | Harold Peterson THIS PERSON | 26 | Son | Laborer | Illinois |
| 68 | Darlene Ellebury | 5 | Grand Daughter | — | Iowa |
| 69 | Marion Ellebury | 4 | Grand Daughter | — | Iowa |
| 70 | Richard C Collins | 37 | Head | Farmer | Iowa |
| 71 | Gertrude Collins | 37 | Wife | — | Iowa |
| 72 | Karl Fernald | 59 | Head | Farmer | Iowa |
| 73 | Maude L Fernald | 55 | Wife | Day Maid | Iowa |
| 74 | Gwen Fernald | 15 | Daughter | — | Iowa |
| 75 | Andrew Bergfeld | 41 | Head | Farmer | Iowa |
| 76 | Stacia Bergfeld | 38 | Wife | — | Iowa |
| 77 | Anita M Bergfeld | 14 | Daughter | — | Iowa |
| 78 | Charles L Bergfeld | 13 | Son | — | Iowa |
| 79 | Lloyd L Bergfeld | 11 | Son | — | Iowa |
| 80 | Kathryn W Bergfeld | 8 | Daughter | — | Iowa |
Pedigree Summary
Harold
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)