MH
Margaret Hamilton — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-County, Maryland
Our Model Tree links this Margaret Hamilton across the 1910, 1920, 1930 and 1940 US Censuses in Baltimore-County, Maryland (XGBoost, ~Confirmed), with identified parents John & Alice — first a spouse (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Female
Spouse
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-County, Maryland |
| Surname | Hamilton |
| Given Name | Margaret M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Township / Ward | District 11 Pikeville |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Margaret | Age | Birth yr |
|---|---|---|---|---|
| Margaret Hamilton | Daughter | — | 2 | ~1938 |
| Thomas Hamilton | Head | — | 25 | ~1915 |
| Margaret Hamilton | Spouse | — | 29 | ~1911 |
| Martha Hamilton | Daughter | — | 1 | ~1939 |
Census Appearances
1910
Baltimore, Maryland
Daughter, age
Baltimore, Maryland · implied b. ~1910 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Myrtle L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1920
Baltimore, Maryland
Daughter, age 9
Baltimore, Maryland · implied b. ~1911 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Mary F. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
Daughter, age 18
Baltimore, Maryland · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-County, Maryland
Spouse, age 29
Baltimore-County, Maryland · implied b. ~1911 — 4 household members
| Surname | Hamilton |
| Given Name | Margaret M. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Baltimore |
| Industry | H |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
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 4 US Census years (1910, 1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Hamilton (~0.92 confidence) and mother Alice Hamilton (~0.92 confidence) and mother Victoria Hamilton (~0.92 confidence) and father William Hamilton (~0.92 confidence) and mother Anna Hamilton (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Hamilton
b. ~1874
Source father
● Household
· direct · ~0.92
Mother
Alice Hamilton
b. ~1879
Source mother
● Household
· direct · ~0.92
Mother
Victoria Hamilton
b. ~1880
Source mother
● Household
· direct · ~0.92
Father
William Hamilton
b. ~1880
Source father
● Household
· direct · ~0.92
Mother
Anna Hamilton
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Margaret Hamilton
Spouse · 1940 · age 29 · b. ~1911 · Maryland
★ 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 — Baltimore-County, Maryland
Open full size
1940 US Federal Census — Baltimore-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01505-00862)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Herbert S. Neal | 48 | Head | Bricklayer | Maryland |
| 2 | Bessie E. Neal | 48 | Wife | — | Maryland |
| 3 | Monroe E. Neal | 20 | Son | Mechanic | Maryland |
| 4 | Melvin M. Neal | 19 | Son | — | Maryland |
| 5 | Harry Wessel | 51 | Head | Edge Setter | Pennsylvania |
| 6 | Charlotte M. Wessel | 51 | Wife | — | Maryland |
| 7 | Marion C. Wessel | 14 | Daughter | — | Maryland |
| 8 | Thomas L. Hamilton | 25 | Head | Title Searcher | Maryland |
| 9 | Margaret M. Hamilton THIS PERSON | 29 | Wife | — | Maryland |
| 10 | Margaret E. Hamilton | 2 | Daughter | — | Maryland |
| 11 | Martha E. Hamilton | 1 | Daughter | — | Maryland |
| 12 | Carroll M. Hartlove | 28 | Head | Salesman | Maryland |
| 13 | Viola B. Hartlove | 30 | Wife | — | Maryland |
| 14 | Lorraine F. Hartlove | 7 | Daughter | — | Maryland |
| 15 | Carroll W. J. Hartlove | 3 | Son | — | Maryland |
| 16 | Charles X. Jenkins | 23 | Head | Edge Setter | Maryland |
| 17 | Doris E. Jenkins | 23 | Wife | — | Maryland |
| 18 | Blance T. Jenkins | 1 | Daughter | — | Maryland |
| 19 | Wayne K. Jenkins | 0 | Son | — | Maryland |
| 20 | Welford H. Fuller | 66 | Head | Farmer | Maryland |
| 21 | Rosie X. Fuller | 65 | Wife | — | Maryland |
| 22 | Howard S. Fuller | 23 | Son | Boiler Cleaner | Maryland |
| 23 | Martha Lang | 40 | Head | — | Maryland |
| 24 | Mildred Lang | 20 | Daughter | Helper | Maryland |
| 25 | Rosie Lang | 14 | Daughter | — | Maryland |
| 26 | Ella Fuller | 12 | Daughter | — | Maryland |
| 27 | Fred Wilberger | 57 | Lodger | Mechanic | Maryland |
| 28 | Bee Wilberger | 46 | Lodger | — | Maryland |
| 29 | Fred Wilberger | 19 | Lodger | New Worker | Maryland |
| 30 | Welford J. Fuller | 45 | Head | — | Maryland |
| 31 | Charles P. Powers | 33 | Head | Salesman | Pennsylvania |
| 32 | Mabelle Powers | 29 | Wife | Stenographer | Pennsylvania |
| 33 | Judith A. Powers | 2 | Daughter | — | Maryland |
| 34 | Anna C. Powers | 69 | Mother | — | Pennsylvania |
| 35 | John R. Bishop | 29 | Head | Painter | Ohio |
| 36 | Thelma Q. Bishop | 28 | Wife | — | Missouri |
| 37 | Phyllis M. Bishop | 8 | Daughter | — | Maryland |
| 38 | Joan C. Bishop | 3 | Daughter | — | Maryland |
| 39 | Emmetery G. Fisher | 25 | Head | Helper | S. Carolina |
| 40 | Agnes A. X. Fisher | 21 | Wife | — | Maryland |
Related Census Records
Pedigree Summary
Margaret
Gen 1 · 5 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)