JH
John Hamilton — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Caroline-County, Maryland
Our Model Tree links this John Hamilton across the 1920, 1930 and 1940 US Censuses in Caroline-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1904), then head of a 5-person household.
Age 36
b. ~1904
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Caroline-County, Maryland |
| Surname | Hamilton |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | Black |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 2 Ridgely |
| 1935 Residence (County) | Caroline |
| Additional Details | |
| Occupation | Farm Hand |
| Industry | Farming |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 295 |
| Highest Grade | No 5 |
| 1935 Residence | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farm Hand |
| Township / Ward | Election District 2 Ridgely |
| Est. Birth Year | ~1904 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Billie Hamilton | Daughter | — | 16 | ~1924 |
| John Hamilton | Head | — | 36 | ~1904 |
| Dallas Hamilton | Son | — | 18 | ~1922 |
| Percell Hamilton | Son | — | 15 | ~1925 |
| Blanche Hamilton | Spouse | — | 36 | ~1904 |
Census Appearances
1920
Caroline, Maryland
Other, age 16
Caroline, Maryland · implied b. ~1904 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | John |
| Relationship to Head | Boarder |
| Sex | M |
| Color / Race | Black |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Home farm |
| Class of Worker | W |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Caroline, Maryland
Head, age 26
Caroline, Maryland · implied b. ~1904 — 35 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 23 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 4 |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Caroline-County, Maryland
Head, age 36
Caroline-County, Maryland · implied b. ~1904 — 5 household members
| Surname | Hamilton |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | Black |
| Age | 36 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Election District 2 Ridgely |
| 1935 Residence (County) | Caroline |
| Occupation | Farm Hand |
| Industry | Farming |
| Class of Worker | PW |
| Hours Worked | 54 |
| Income (1939) | 295 |
| Highest Grade | No 5 |
| 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 John Hamilton across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Hamilton
Head · 1940 · age 36 · b. ~1904 · Maryland
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Caroline-County, Maryland
Open full size
1940 US Federal Census — Caroline-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01543-00744)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | George Johnson | 27 | head | — | Maryland |
| 2 | Ida Johnson | 40 | wife | Laborer | Maryland |
| 3 | James Sherman | 49 | head | Farmer | Maryland |
| 4 | Hattie Sherman | 57 | wife | Laborer | Maryland |
| 5 | Ida May Sherman | 15 | daughter | Laborer | Maryland |
| 6 | Robert Young | 56 | head | — | Maryland |
| 7 | Florence Young | 55 | wife | Laborer | Maryland |
| 8 | Gertrude Young | 20 | daughter | Laborer | Maryland |
| 9 | Florence Young | 18 | daughter | Laborer | Maryland |
| 10 | Dallas Johnson | 18 | son | — | Maryland |
| 11 | George Hayes | 61 | head | — | Maryland |
| 12 | John Hamilton THIS PERSON | 36 | head | Farm Hand | Maryland |
| 13 | Blanche Hamilton | 36 | wife | Laborer | Maryland |
| 14 | Dallas Hamilton | 18 | son | Farm Hand | Maryland |
| 15 | Billie Lyne Hamilton | 16 | daughter | — | Maryland |
| 16 | Percell Hamilton | 15 | son | Farm Hand | Maryland |
| 17 | Charles J Dean | 54 | head | Farmer | Maryland |
| 18 | Nellie B Dean | 28 | wife | — | North Carolina |
| 19 | Barbara J Dean | 5 | daughter | — | Delaware |
| 20 | Charles J Dean | 4 | son | — | Delaware |
| 21 | Elmer S Cooper | 51 | head | Farmer | Maryland |
| 22 | Agnes Cooper | 50 | wife | — | Pennsylvania |
| 23 | Edna M Cooper | 17 | daughter | — | Maryland |
| 24 | Fredrick D Cooper | 13 | son | — | Maryland |
| 25 | Norman P Downes | 49 | head | Farmer | Maryland |
| 26 | Ollie B Downes | 44 | wife | — | Maryland |
| 27 | Norman C Downes | 22 | son | Carpenter | Maryland |
| 28 | Mervin C Downes | 18 | son | Farm Hand | Maryland |
| 29 | Mary C Downes | 12 | daughter | — | Maryland |
| 30 | Charles S Downes | 7 | son | — | Maryland |
| 31 | Norman Lee Downes | 5 | daughter | — | Maryland |
| 32 | Malony Armstead | 32 | head | Clerk | Virginia |
| 33 | Florence D Armstead | 30 | wife | — | Maryland |
| 34 | Maloy Armstead | 1 | son | — | Maryland |
| 35 | Mary P Knott | 71 | mother in law | — | Maryland |
| 36 | Roland Clark | 32 | head | Manager | Maryland |
| 37 | Edna Ruth Clark | 35 | wife | — | Delaware |
| 38 | Bessie R Clark | 11 | daughter | — | Maryland |
| 39 | Doris A Clark | 8 | daughter | — | Maryland |
| 40 | Mary Louise Clark | 2 | daughter | — | Maryland |
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)