HP
Harold Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this Harold Peterson across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1911), then head of a 3-person household.
Age 29
b. ~1911
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Peterson |
| Given Name | Harold, F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Automobile Garage |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 332 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Mechanic |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1911 |
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 Harold | Age | Birth yr |
|---|---|---|---|---|
| Edith Peterson | Spouse | — | 25 | ~1915 |
| Harold Peterson | Head | — | 29 | ~1911 |
| Sandra Peterson | Daughter | — | 3 | ~1937 |
Census Appearances
1920
Polk, Iowa
Son, age 8
Polk, Iowa · implied b. ~1912 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Polk, Iowa
Son, age 18
Polk, Iowa · implied b. ~1912 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Tapper |
| Industry | Hosiery Mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Polk-County, Iowa
Head, age 29
Polk-County, Iowa · implied b. ~1911 — 3 household members
| Surname | Peterson |
| Given Name | Harold, F |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Des Moines City |
| 1935 Residence (County) | Polk |
| Occupation | Mechanic |
| Industry | Automobile Garage |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 332 |
| 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 Peterson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Peterson (~0.92 confidence) and father John Peterson (~0.92 confidence) and mother Emma Peterson (~0.92 confidence) and mother Emma Peterson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Peterson
b. ~1878
Source father
● Household
· direct · ~0.92
Father
John Peterson
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Emma Peterson
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Emma Peterson
b. ~1885
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Peterson
Head · 1940 · age 29 · b. ~1911 · 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 — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01197-00255)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lucille, V Morgan | 16 | Daughter | Maid | Iowa |
| 42 | Eunice, E Morgan | 14 | Daughter | — | Iowa |
| 43 | Betty, J Morgan | 10 | Daughter | — | Iowa |
| 44 | Nell, M Voorhees | 43 | Head | Book Binder | Iowa |
| 45 | Robert Voorhees | 22 | Son | Laborer | Iowa |
| 46 | Virginia Voorhees | 16 | Daughter | — | Iowa |
| 47 | Richard Voorhees | 11 | Son | — | Iowa |
| 48 | Wilson, H Regner | 69 | Father | — | Illinois |
| 49 | William, G Brown | 60 | Head | Barber And Owner | Iowa |
| 50 | Nellie Brown | 56 | Wife | — | Iowa |
| 51 | Frank, S Brown | 36 | Son | Book Binder | Iowa |
| 52 | Harold, F Peterson THIS PERSON | 29 | Head | Mechanic | Iowa |
| 53 | Edith, V Peterson | 25 | Wife | — | Iowa |
| 54 | Sandra, J Peterson | 3 | Daughter | — | Iowa |
| 55 | Wilbert, G Brown | 39 | Head | Truck Driver | Iowa |
| 56 | Gladys, V Brown | 31 | Wife | Clerk | Iowa |
| 57 | Wilbert, G Brown | 15 | Son | — | Iowa |
| 58 | Edwin, H Moore | 36 | Head | Cutter | Iowa |
| 59 | Cleo, L Moore | 35 | Wife | — | Iowa |
| 60 | Kenneth, R Moore | 9 | Son | — | Iowa |
| 61 | Albert, F Brady | 28 | Head | Floor Man | Iowa |
| 62 | Edith, M Brady | 32 | Wife | Inspector | Iowa |
| 63 | Patricia, L Brady | 7 | Daughter | — | Iowa |
| 64 | Carrie, A Wahl | 58 | Mother in law | — | Iowa |
| 65 | Melvin, E Frakes | 29 | Head | Electric Welder | Iowa |
| 66 | Elsie Frakes | 33 | Wife | Stenographer | Iowa |
| 67 | Sandra, J Frakes | 4 | Daughter | — | Iowa |
| 68 | Arista, H Field | 69 | Head | — | Iowa |
| 69 | Linnie, L Field | 67 | Wife | — | Iowa |
| 70 | Cora, M Goldsworth | 48 | Head | — | Missouri |
| 71 | Carl, E Goldsworth | 7 | Son | — | Iowa |
| 72 | Everett, H Mckeever | 23 | Head | Dry Cleaner | Iowa |
| 73 | Phyllis, J Mckeever | 22 | Wife | Ticket Stamper | Iowa |
| 74 | Gerald, B Metsker | 30 | Head | Casing Dept | Missouri |
| 75 | Margaret, L Metsker | 24 | Wife | — | Missouri |
| 76 | Larry, L Metsker | 1 | Son | — | Missouri |
| 77 | Oscar, S Ward | 69 | Head | — | Missouri |
| 78 | Flora, R Ward | 69 | Wife | — | Iowa |
| 79 | Wanda, J Ward | 11 | Grand Daughter | — | Iowa |
| 80 | Virginia, L Evatt | 6 | 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)