HC
Harry Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Harry Campbell across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Thomas & Myrtle — first a head (b.~1915), then head of a 5-person household.
Age 25
b. ~1915
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Campbell |
| Given Name | Harry J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore |
| Additional Details | |
| Occupation | Operator |
| Industry | Pigment |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | H 4 |
| 1935 Residence | Same Place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Operator |
| Township / Ward | Baltimore |
| Est. Birth Year | ~1915 |
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 Harry | Age | Birth yr |
|---|---|---|---|---|
| Harry Campbell | Son | — | 3 | ~1937 |
| Elsie Rabbe | Other | — | 54 | ~1886 |
| Harry Campbell | Head | — | 25 | ~1915 |
| Clayton Rabbe | Son | — | 23 | ~1917 |
| Naomi Campbell | Spouse | — | 25 | ~1915 |
Census Appearances
1920
None, Maryland
Son, age 5
None, Maryland · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Virginia |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 15
Baltimore, Maryland · implied b. ~1915 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Harry S |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Virginia |
| Occupation | none |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 25
Baltimore-City-County, Maryland · implied b. ~1915 — 5 household members
| Surname | Campbell |
| Given Name | Harry J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore |
| Occupation | Operator |
| Industry | Pigment |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1000 |
| Highest Grade | H 4 |
| 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 Harry Campbell across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage. Identified parents: father Thomas Campbell (~0.92 confidence) and mother Myrtle Campbell (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Campbell
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Myrtle Campbell
b. ~1893
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Campbell
Head · 1940 · age 25 · b. ~1915 · 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-City-County, Maryland
Open full size
1940 US Federal Census — Baltimore-City-County, Maryland
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-01536-00600)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | Lurline Mcgowan | 40 | Head | Machinist | Maryland |
| 3 | Lelia Mcgowan | 35 | Wife | Waitress | Maryland |
| 4 | Frederick Mcgowan | 14 | Son | — | Maryland |
| 5 | Silas W. Jefferson | 62 | Head | Processor | Maryland |
| 6 | Matilda Jefferson | 80 | Mother Law | — | Maryland |
| 7 | David Johnson | 66 | Head | Chemical Worker | Maryland |
| 8 | Anna Johnson | 61 | Wife | — | Maryland |
| 9 | James W. Brooks | 37 | Son Law | Manager Steam Room | Virginia |
| 10 | Carrie M. Brooks | 30 | Daughter | — | Maryland |
| 11 | Charles D. Webster | 46 | Head | Machinist | Maryland |
| 12 | Edna Webster | 43 | Wife | — | Poland |
| 13 | Bernadette Webster | 23 | Daughter | Typist | Maryland |
| 14 | Doris Webster | 18 | Daughter | — | Maryland |
| 15 | Harry J. Campbell THIS PERSON | 25 | Head | Operator | Maryland |
| 16 | Naomi Campbell | 25 | Wife | — | Maryland |
| 17 | Harry E. Campbell | 3 | Son | — | Maryland |
| 18 | Elsie Rabbe | 54 | Mother Law | — | Maryland |
| 19 | Clayton Rabbe | 23 | Son | Machinist Helper | Maryland |
| 20 | Clarence A. Jefferson | 42 | Head | General Helper | Maryland |
| 21 | Elizabeth Jefferson | 40 | Wife | Waitress | Maryland |
| 22 | Alexander Jefferson | 21 | Son | Labor | Maryland |
| 23 | Curtis Jefferson | 15 | Son | — | Maryland |
| 24 | John Haberkorn | 41 | Head | Mechanic | Maryland |
| 25 | Frieda Haberkorn | 32 | Wife | Proprietor | Maryland |
| 26 | Frank Haberkorn | 7 | Son | — | Maryland |
| 27 | John Haberkorn | 6 | Son | — | Maryland |
| 28 | William Haberkorn | 4 | Son | — | Maryland |
| 29 | Nettie Judd | 62 | Head | — | North Carolina |
| 31 | George Mayer | 42 | Head | Carpenter | Maryland |
| 32 | Martha Mayer | 39 | Wife | — | Poland |
| 33 | Alma Mayer | 12 | Daughter | — | Maryland |
| 34 | George Mayer | 10 | Son | — | Maryland |
| 35 | Ella Mock | 67 | Head | — | Maryland |
| 36 | Emma Mittchel | 44 | Head | Waitress | Maryland |
| 37 | Harry Charles Mittchel | 28 | Son | — | Maryland |
| 38 | Muriel Mittchel | 18 | Daughter | General Helper | Maryland |
| 39 | William J. Cherry | 52 | Head | Pipefitter | Maryland |
| 40 | Bessie Cherry | 51 | Wife | — | Maryland |
Pedigree Summary
Harry
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)