HC
Harry Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Snohomish-County, Washington
Our Model Tree links this Harry Campbell across the 1920, 1930 and 1940 US Censuses in Snohomish-County, Washington (XGBoost, ~Confirmed), with identified parents Harry & J — first a son (b.~1906), then head of a 3-person household.
Age 34
b. ~1906
Male
Son
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Snohomish-County, Washington |
| Surname | Campbell |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Everett |
| 1935 Residence (County) | Snohomish |
| Additional Details | |
| Occupation | Clerk |
| Industry | Commodity Dept. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 576 |
| Highest Grade | H-4 |
| 1935 Residence | Same Place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Clerk |
| Township / Ward | Everett |
| Est. Birth Year | ~1906 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Monica Campbell | Spouse | — | 62 | ~1878 |
| Harry Campbell | Son | — | 34 | ~1906 |
| J Campbell | Head | — | 69 | ~1871 |
Census Appearances
1920
Snohomish, Washington
Other, age 14
Snohomish, Washington · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Harry J. |
| Relationship to Head | Student |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Unknown |
| Mother's Birthplace | Wisconsin |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
Snohomish, Washington
Son, age 25
Snohomish, Washington · implied b. ~1905 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Harry J |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Washington |
| Mother's Birthplace | Wisconsin |
| Occupation | Clerk |
| Industry | Bank |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
Snohomish-County, Washington
Son, age 34
Snohomish-County, Washington · implied b. ~1906 — 3 household members
| Surname | Campbell |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Everett |
| 1935 Residence (County) | Snohomish |
| Occupation | Clerk |
| Industry | Commodity Dept. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 576 |
| Highest Grade | H-4 |
| 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 Harry Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Campbell (~0.92 confidence) and father J Campbell (~0.92 confidence) and mother Monica Campbell (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Campbell
b. ~1871
Source father
● Household
· direct · ~0.92
Father
J Campbell
b. ~1871
Source father
● Household
· direct · ~0.92
Mother
Monica Campbell
b. ~1878
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Campbell
Son · 1940 · age 34 · b. ~1906 · 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 — Snohomish-County, Washington
Open full size
1940 US Federal Census — Snohomish-County, Washington
Page Contents
35 people indexed on this census page (nara:1940:m-t0627-04359-00695)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Betty Rose Pogreba | 14 | Daughter | — | So. Dakota |
| 42 | Carol Pat Pogreba | 9 | Daughter | — | Washington |
| 43 | Thomas Pogreba | 7 | Son | — | Washington |
| 44 | Carl A. Peterson | 68 | Head | — | Minnesota |
| 45 | Amalia Peterson | 63 | Wife | — | Minnesota |
| 46 | Violett L. Peterson | 23 | Daughter | Book Keeper | North Dakota |
| 47 | H. L. Kaden | 28 | Head | Metal Sander | Washington |
| 48 | Ethel Kaden | 22 | Wife | — | Canada-English |
| 49 | Jo. Ann Kaden | 0 | Daughter | — | Washington |
| 50 | Anna Johannsen | 56 | Head | — | Iowa |
| 51 | Ernest Johannsen | 29 | Son | Laborer | Washington |
| 52 | Anna Johannsen | 15 | Daughter | — | Washington |
| 53 | F. M. Novak | 70 | Head | — | Wisconsin |
| 54 | Anna Novak | 70 | Wife | — | Wisconsin |
| 55 | R. L. James | 41 | Head | Accountant | Canada-French |
| 56 | Charlotte James | 29 | Wife | — | Washington |
| 57 | Elizabeth Bamford | 76 | Head | — | Illinois |
| 58 | C. A. Peck | 74 | Head | Mill Wright | Colorado |
| 59 | Carrie Peck | 68 | Wife | — | Iowa |
| 60 | William E. Peck | 39 | Son | Machine Layer | Washington |
| 61 | Marie F. Peck | 24 | Daughter | Stenographer | Washington |
| 62 | Bertha Hannes | 28 | Granddaughter | Stenographer | Montana |
| 63 | J. H. Campbell | 69 | Head | — | Washington |
| 64 | Monica Campbell | 62 | Wife | — | Wisconsin |
| 65 | Harry Campbell THIS PERSON | 34 | Son | Clerk | Washington |
| 66 | Wm. Hanson | 59 | Head | Meat Cutter | Michigan |
| 67 | Ada O. Hanson | 51 | Wife | — | North Dakota |
| 68 | Stanley M. Hanson | 25 | Son | Clerk | North Dakota |
| 69 | W. L. Thompson | 67 | Head | M.D. Doctor | Vermont |
| 70 | Flora M. Thompson | 65 | Wife | — | Indiana |
| 71 | Myra Straton | 33 | Maid | House Maid | Oregon |
| 72 | Charlotte Mcneely | 56 | Head | Music Teacher | Canada-English |
| 73 | Ray Darmon | 39 | Lodger | Clergyman | Virginia |
| 74 | May Anderson | 25 | Lodger | — | — |
| 75 | Lillie Trubant | 27 | Lodger | Accountant | — |
Pedigree Summary
Harry
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)