MH
Margaret Hamilton — 1940 US Census Record
Model Tree available1940 United States Federal Census · Alameda-County, California
Our Model Tree links this Margaret Hamilton across the 1920, 1930 and 1940 US Censuses in Alameda-County, California (XGBoost, ~Confirmed), with identified parents Archibald & Maud — first a spouse (b.~1914), then head of a 3-person household.
Age 26
b. ~1914
Female
Spouse
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Alameda-County, California |
| Surname | Hamilton |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Berkeley City |
| 1935 Residence (County) | Alameda |
| Additional Details | |
| Occupation | Inspector |
| Industry | Battery Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 307 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Inspector |
| Township / Ward | Berkeley City |
| 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Extra Hamilton | Son | — | 1 | ~1939 |
| Margaret Hamilton | Spouse | — | 26 | ~1914 |
| Harold Hamilton | Head | — | 24 | ~1916 |
Census Appearances
1920
Alameda, California
Daughter, age 3
Alameda, California · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Margaret A. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Canada |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Alameda, California
Daughter, age 14
Alameda, California · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Margaret |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Canada |
| Mother's Birthplace | California |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Alameda-County, California
Spouse, age 26
Alameda-County, California · implied b. ~1914 — 3 household members
| Surname | Hamilton |
| Given Name | Margaret |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | Berkeley City |
| 1935 Residence (County) | Alameda |
| Occupation | Inspector |
| Industry | Battery Factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 307 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Margaret Hamilton across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Archibald Hamilton (~0.92 confidence) and mother Maud Hamilton (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Archibald Hamilton
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Maud Hamilton
b. ~1882
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Hamilton
Spouse · 1940 · age 26 · b. ~1914 · 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-t0627-00188-00498)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Arnold Sargent | 30 | Head | Patrolman | Washington |
| 2 | Elizabeth A. Sargent | 23 | Wife | — | Oregon |
| 3 | Ann Sargent | 2 | Daughter | — | California |
| 4 | Edward M. Doglio | 34 | Head | Attendant | Italy |
| 5 | Julia Doglio | 25 | Wife | — | California |
| 6 | Thomas Doglio | 8 | Son | — | California |
| 7 | George Waterman | 39 | Head | Manager | Illinois |
| 8 | Victoria Waterman | 36 | Wife | — | New York |
| 9 | Edward Schmidt | 39 | Head | Auditor | California |
| 10 | Nancy Schmidt | 34 | Wife | — | Pennsylvania |
| 11 | Sally Ann Schmidt | 3 | Daughter | — | California |
| 12 | Dan Johnson | 45 | Head | Bartender | Finland |
| 13 | Hilda Johnson | 50 | Wife | — | Finland |
| 14 | Eric Johnson | 20 | Son | Sign Painter | Finland |
| 15 | Emil Tallis | 47 | Head | Carpenter | Finland |
| 16 | Ina Tallis | 40 | Wife | — | Texas |
| 17 | Sylvia Tallis | 21 | Daughter | Clerk | Montana |
| 18 | Harold A. Hamilton | 24 | Head | Order Clerk | California |
| 19 | Margaret Hamilton THIS PERSON | 26 | Wife | Inspector | California |
| 20 | Extra Hamilton | 1 | Son | — | California |
| 21 | Lillie Trinden | 56 | Head | — | California |
| 22 | Percy M. Speed | 35 | Lodger | Worker | California |
| 23 | Harold Abrams | 36 | Head | Salesman | New York |
| 24 | Josephine Abrams | 37 | Wife | — | Honolulu |
| 25 | Benjamin Aguire | 67 | Head | Elevator Operator | California |
| 26 | Maria Aguire | 55 | Wife | Housework | Oregon |
| 27 | Roy E. Stevens | 39 | Step-son | Salesman | California |
| 28 | Extra Stevens | 1 | Son | — | California |
| 29 | George Carso | 25 | Head | Manager | California |
| 30 | Josephine Carso | 23 | Wife | — | California |
| 31 | Joseph Carso | 1 | Son | — | California |
| 32 | Harry Ahles | 42 | Head | Manager | Greece |
| 33 | Crystal Ahles | 35 | Wife | — | Greece |
| 34 | Lambro Ahles | 13 | Son | — | California |
| 35 | Takie Ahles | 11 | Son | — | California |
| 36 | Charles Joost | 27 | Head | Assistant Manager | California |
| 37 | Evelyn Joost | 23 | Wife | — | California |
| 38 | James Mastrodomenico | 63 | Head | Gardener | Italy |
| 39 | Mary M. Mastrodomenico | 37 | Wife | Starcher | Colorado |
| 40 | Clarence J. Frates | 35 | Head | Truck Driver | California |
Pedigree Summary
Margaret
Gen 1 · 2 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)