JH
John Harmon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Worcester-County, Maryland
Our Model Tree links this John Harmon across the 1920, 1930 and 1940 US Censuses in Worcester-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1889), then head of a 5-person household.
Age 51
b. ~1889
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Maryland |
| Surname | Harmon |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | 4th Election District |
| 1935 Residence (County) | Worcester |
| Additional Details | |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 0 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Farmer |
| Township / Ward | 4Th Election District |
| Est. Birth Year | ~1889 |
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 |
|---|---|---|---|---|
| John Harmon | Head | — | 51 | ~1889 |
| James Purnell | Other | — | 17 | ~1923 |
| Annie Purnell | Other | — | 76 | ~1864 |
| Charles Harmon | Son | — | 17 | ~1923 |
| Hester Harmon | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Worcester, Maryland
Head, age 31
Worcester, Maryland · implied b. ~1889 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harmon |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 31 |
| Marital Status | Married |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farm operator |
| Industry | Truck farm |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Worcester, Maryland
Head, age 41
Worcester, Maryland · implied b. ~1889 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harmon |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 20 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Farmer |
| Industry | General farm |
| Class of Worker | O |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Worcester-County, Maryland
Head, age 51
Worcester-County, Maryland · implied b. ~1889 — 5 household members
| Surname | Harmon |
| Given Name | John H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | 4th Election District |
| 1935 Residence (County) | Worcester |
| Occupation | Farmer |
| Industry | Farming |
| Class of Worker | OA |
| Hours Worked | 60 |
| Income (1939) | 0 |
| Highest Grade | 0 |
| 1935 Residence | Same place |
| 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 Harmon across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Harmon
Head · 1940 · age 51 · b. ~1889 · 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 — Worcester-County, Maryland
Open full size
1940 US Federal Census — Worcester-County, Maryland
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01564-00340)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mellie E. Jackson | 17 | Wife | — | Maryland |
| 42 | Robert W. Jackson | 0 | Son | — | Maryland |
| 43 | William S. Smith | 74 | Head | Crabbing | Delaware |
| 44 | Annie D. Smith | 64 | Wife | — | Kansas |
| 45 | Raymond Wise | 32 | Head | Laborer | Maryland |
| 46 | Rose Wise | 36 | Wife | — | North Carolina |
| 47 | Elizabeth Wise | 14 | Daughter | — | North Carolina |
| 48 | Raymond Wise | 12 | Son | — | Virginia |
| 49 | Rosalie Wise | 9 | Daughter | — | Virginia |
| 50 | Ethel Wise | 7 | Daughter | — | North Carolina |
| 51 | R. Franklin Wise | 5 | Son | — | North Carolina |
| 52 | Mary Wise | 3 | Daughter | — | North Carolina |
| 53 | Candy E. Staton | 73 | Head | Laborer | Maryland |
| 54 | Sally E. Staton | 51 | Wife | — | Delaware |
| 55 | Edward N. Early | 27 | Head | Farmer | Pennsylvania |
| 56 | Alice Early | 24 | Wife | Laborer | Maryland |
| 57 | Tom C. Hancock | 49 | Head | Crabbing | Virginia |
| 58 | L. Frederick Hancock | 23 | Son | Crabbing | Virginia |
| 59 | John H. Harmon THIS PERSON | 51 | Head | Farmer | Maryland |
| 60 | Hester E. Harmon | 50 | Wife | — | Maryland |
| 61 | Charles H. Harmon | 17 | Son | Laborer | Maryland |
| 62 | James Purnell | 17 | Adp. Son | Laborer | New Jersey |
| 63 | Annie M. Purnell | 76 | Mother-in-law | — | Maryland |
| 64 | Charles E. Mock | 25 | Head | Farmer | Maryland |
| 65 | Lucille H. Mock | 26 | Wife | — | Maryland |
| 66 | Isabelle Mock | 7 | Daughter | — | Maryland |
| 67 | Hermione Mock | 5 | Daughter | — | Maryland |
| 68 | Lottie Mock | 3 | Daughter | — | Maryland |
| 69 | Abel Young | 30 | Head | Laborer | Virginia |
| 70 | Sara Young | 30 | Wife | Housework | Maryland |
| 71 | Alice Young | 8 | Daughter | — | Maryland |
| 72 | Carl Young | 6 | Son | — | Maryland |
| 73 | Herbert D. Hastings | 31 | Head | Laborer | Maryland |
| 74 | Florence H. Hastings | 25 | Wife | Laborer | Maryland |
| 75 | Charles Hastings | 7 | Son | — | Maryland |
| 76 | Donald E. Hastings | 5 | Son | — | Maryland |
| 77 | Joe L. D. Mitchell | 72 | Head | Farmer | Maryland |
| 78 | Carrie Mitchell | 62 | Wife | Laborer | Maryland |
| 79 | George Jackson | 48 | Head | Farmer | Maryland |
| 80 | Emma Jackson | 49 | Wife | — | 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)