HP
Harold Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · King-County, Washington
Our Model Tree links this Harold Peterson across the 1910, 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed), with identified parents John & Sam — first a head (b.~1907), then head of a 3-person household.
Age 33
b. ~1907
Male
Head
Born: Washington
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | Sylvan precinct |
| 1935 Residence (County) | King |
| Additional Details | |
| Occupation | laborer |
| Industry | road construction |
| Class of Worker | GW |
| Hours Worked | 28 |
| Income (1939) | 440 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Laborer |
| Township / Ward | Sylvan Precinct |
| Est. Birth Year | ~1907 |
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 |
|---|---|---|---|---|
| Charlie Peterson | Son | — | 2 | ~1938 |
| Lucile Peterson | Spouse | — | 24 | ~1916 |
| Harold Peterson | Head | — | 33 | ~1907 |
Census Appearances
1910
King, Washington
Son, age 5
King, Washington · implied b. ~1905 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1920
King, Washington
Son, age 14
King, Washington · implied b. ~1906 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petersen |
| Given Name | Harold |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Norwegian |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
King, Washington
Son, age 24
King, Washington · implied b. ~1906 — 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 | 24 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Laborer |
| Industry | Steam boat |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Head, age 33
King-County, Washington · implied b. ~1907 — 3 household members
| Surname | Peterson |
| Given Name | Harold |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 33 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | Sylvan precinct |
| 1935 Residence (County) | King |
| Occupation | laborer |
| Industry | road construction |
| Class of Worker | GW |
| Hours Worked | 28 |
| Income (1939) | 440 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Peterson (~0.92 confidence) and father Sam Petersen (~0.92 confidence) and father John Peterson (~0.92 confidence) and mother Olea Petersen (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Peterson
b. ~1871
Source father
● Household
· direct · ~0.92
Father
Sam Petersen
b. ~1871
Source father
● Household
· direct · ~0.92
Father
John Peterson
b. ~1872
Source father
● Household
· direct · ~0.92
Mother
Olea Petersen
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harold Peterson
Head · 1940 · age 33 · b. ~1907 · Washington
★ 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 — King-County, Washington
Open full size
1940 US Federal Census — King-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04346-00649)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edith Lind | 41 | wife | — | Iowa |
| 42 | Helen Lind | 16 | daughter | — | Alaska |
| 43 | Jean Lind | 15 | daughter | — | Washington |
| 44 | Audrey Lind | 12 | daughter | — | Washington |
| 45 | Maggie Boudgourt | 73 | head | — | Germany |
| 46 | Louis Boudgourt | 5 | son | — | Pennsylvania |
| 47 | Kenneth Macdonald | 52 | head | Mechanic Master | Canada-English |
| 48 | Cora B. Macdonald | 43 | wife | — | Washington |
| 49 | E. Jean Macdonald | 20 | daughter | Saleslady | Canada-English |
| 50 | Wm Wayne Macdonald | 18 | daughter | — | Canada-English |
| 51 | Kendall Macdonald | 16 | son | — | Canada-English |
| 52 | Gustavo Zari | 64 | head | Stock Chaser | Italy |
| 53 | Eda Zari | 52 | wife | — | Italy |
| 54 | Rena Zari | 23 | daughter | Waitress | Washington |
| 55 | Delfo Zari | 28 | son | Golf Professional | Washington |
| 56 | Ernest Fisher | 48 | head | Carpenter | Michigan |
| 57 | Laura Fisher | 47 | wife | — | Michigan |
| 58 | Emil Hanson | 46 | head | Laborer | Sweden |
| 59 | Eda Hanson | 35 | wife | Cannery | Finland |
| 60 | Edward Snyder | 48 | head | Shingle Sawyer | Michigan |
| 61 | Sigrid Snyder | 44 | wife | Cannery | Finland |
| 62 | Edwin C. Roderick | 46 | head | Cement Burner | Oklahoma |
| 63 | Catherine Roderick | 36 | wife | — | Canada-English |
| 64 | Willy Edward Roderick | 14 | son | — | California |
| 65 | William E. Carelay | 31 | head | A Tractor Work | Washington |
| 66 | Dorothy Carelay | 31 | wife | — | Montana |
| 67 | Linda Carelay | 6 | daughter | — | Washington |
| 68 | Jerry Carelay | 4 | son | — | Washington |
| 69 | Sharon Carelay | 2 | daughter | — | Washington |
| 70 | George Courtright | 37 | head | Fabrication House | Washington |
| 71 | Doreen Courtright | 37 | wife | — | Nevada |
| 72 | Howard B. Pryer | 54 | head | Salesman | Missouri |
| 73 | Sally Pryer | 49 | wife | — | Michigan |
| 74 | Harold Peterson THIS PERSON | 33 | head | Laborer | Washington |
| 75 | Lucile Peterson | 24 | wife | — | Washington |
| 76 | Charlie Peterson | 2 | son | — | Washington |
| 77 | George L. Courtright | 64 | head | Operated | Minnesota |
| 78 | Minnie Courtright | 60 | wife | — | North Carolina |
| 79 | Robert Nelson | 50 | head | Laborer | Illinois |
| 80 | Selma Nelson | 51 | wife | — | Canada-English |
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)