HP
Harry Peterson — 1940 US Census Record
Model Tree available1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Harry Peterson across the 1910, 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed), with identified parents Chas & Ellen — first a head (b.~1896), then head of a 3-person household.
Age 44
b. ~1896
Male
Head
Born: Washington
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Peterson |
| Given Name | Harry C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | Oakland City |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Occupation | Letter Carrier |
| Industry | U.S. Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2100 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Letter Carrier |
| Township / Ward | Oakland City |
| Est. Birth Year | ~1896 |
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 |
|---|---|---|---|---|
| Harry Peterson | Head | — | 44 | ~1896 |
| Ruth Peterson | Spouse | — | 43 | ~1897 |
| Ralph Peterson | Son | — | 17 | ~1923 |
Census Appearances
1910
San Francisco, …
Son, age 14
San Francisco, California · implied b. ~1896 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harry C. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Den. Danish |
| Mother's Birthplace | Swed. Swedish |
| Occupation | News Carrier |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1920
San Francisco, …
Son, age 24
San Francisco, California · implied b. ~1896 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Peterson |
| Given Name | Harry E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Sweden |
| Occupation | Mail Carrier |
| Industry | U.S.A. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
Alameda, California
Head, age 34
Alameda, California · implied b. ~1896 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Petterson |
| Given Name | Harry C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Washington |
| Age at First Marriage | 25 |
| Father's Birthplace | Denmark |
| Mother's Birthplace | Sweden |
| Occupation | Letter Carrier |
| Industry | P.O. Dept Gov. |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 4700 |
| Radio Set | R |
| Veteran | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
Alameda-County, California
Head, age 44
Alameda-County, California · implied b. ~1896 — 3 household members
| Surname | Peterson |
| Given Name | Harry C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Washington |
| 1935 Residence (City) | Oakland City |
| 1935 Residence (County) | Alameda |
| Occupation | Letter Carrier |
| Industry | U.S. Post Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 2100 |
| Highest Grade | Hs 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 Peterson across 4 US Census years (1910, 1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Chas Peterson (~0.92 confidence) and mother Ellen Peterson (~0.92 confidence) and mother Ellen Peterson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Chas Peterson
b. ~1870
Source father
● Household
· direct · ~0.92
Mother
Ellen Peterson
b. ~1873
Source mother
● Household
· direct · ~0.92
Mother
Ellen Peterson
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Peterson
Head · 1940 · age 44 · b. ~1896 · California
★ 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 — Alameda-County, California
Open full size
1940 US Federal Census — Alameda-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00433-00492)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edith E. Ruth | 33 | Wife | Housewife | California |
| 2 | Shirley R. Ruth | 16 | Daughter | Co-Partner | California |
| 3 | Wayne E. Ruth | 10 | Son | — | California |
| 4 | Charles Thilen | 72 | Head | — | Oakland |
| 5 | Ellen J. Thilen | 71 | Wife | — | Ireland |
| 6 | Daniel W. Parks | 59 | Head | Building Contractor | Missouri |
| 7 | Edna E. Parks | 53 | Wife | Housewife | Missouri |
| 8 | Harry C. Peterson THIS PERSON | 44 | Head | Letter Carrier | Washington |
| 9 | Ruth D. Peterson | 43 | Wife | Housewife | Washington |
| 10 | Ralph H. Peterson | 17 | Son | Delivery Boy | California |
| 11 | George W. Scott | 39 | Head | Pattern Maker | England |
| 12 | Marion M. Scott | 38 | Wife | — | England |
| 13 | Shirley M. Scott | 14 | Daughter | — | California |
| 14 | Russell G. Scott | 8 | Son | — | California |
| 15 | Samuel Gluck | 57 | Head | Mine Engineer | California |
| 16 | Bertha May Gluck | 52 | Wife | — | Iowa |
| 17 | Jack N. Gluck | 18 | Son | Clerk | Washington |
| 18 | Donald B. Gluck | 16 | Son | — | California |
| 19 | Harry A. Oldham | 40 | Head | Locomotive Fireman | California |
| 20 | Evelyn K. Oldham | 41 | Wife | — | California |
| 21 | Betty Jr. Oldham | 17 | Daughter | — | Oregon |
| 22 | Richard A. Oldham | 15 | Son | — | California |
| 23 | Harry J. Oldham | 5 | Son | — | California |
| 24 | Arthur L. Simmons | 64 | Head | Co-Partner | New York |
| 25 | Grace A. Simmons | 55 | Wife | Co-Partner | New York |
| 26 | William H. Little | 56 | Head | Co-Partner | California |
| 27 | Eva Little | 53 | Wife | — | Texas |
| 28 | Joseph M. Lichenhall | 52 | Head | Brakeman | Illinois |
| 29 | Catherine M. Lichenhall | 52 | Wife | — | Illinois |
| 30 | Person Richard J. Lichenhall | 11 | Son | — | California |
| 31 | John J. Defan | 47 | Head | Electrical Worker | Pennsylvania |
| 32 | Bessie J. Defan | 57 | Wife | — | New York |
| 33 | Virginia L. Defan | 23 | Daughter | Office Clerk | New York |
| 34 | Robert L. Sprague | 24 | Head | Office Clerk | Utah |
| 35 | Anabelle Sprague | 22 | Wife | Secretary | California |
| 36 | Carle W. Phillips | 36 | Head | Seaman 1St Class | California |
| 37 | Patricia A. Phillips | 29 | Wife | — | Washington |
| 38 | Penny C. Phillips | 1 | Daughter | — | Washington |
| 39 | Paul B. Bagdasian | 62 | Head | Proprietor | Armenia |
| 40 | Rose B. Bagdasian | 53 | Wife | Saleslady | Armenia |
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)