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 Preston & Preston — first a son (b.~1919), then head of a 6-person household.
Age 21
b. ~1919
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Campbell |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Tailor |
| Industry | Own shop |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 654 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Tailor |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1919 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harry | Age | Birth yr |
|---|---|---|---|---|
| Audrey Campbell | Daughter | — | 17 | ~1923 |
| Preston Campbell | Head | — | 46 | ~1894 |
| Mildred Campbell | Son | — | 19 | ~1921 |
| Mary Campbell | Spouse | — | 38 | ~1902 |
| Preston Campbell | Son | — | 23 | ~1917 |
| Harry Campbell | Son | — | 21 | ~1919 |
Census Appearances
1920
Baltimore, Maryland
Son, age 1
Baltimore, Maryland · implied b. ~1919 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Harry L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 11
Baltimore, Maryland · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 11 |
| 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-City-County, Maryland
Son, age 21
Baltimore-City-County, Maryland · implied b. ~1919 — 6 household members
| Surname | Campbell |
| Given Name | Harry |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | Black |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Tailor |
| Industry | Own shop |
| Class of Worker | OA |
| Hours Worked | 50 |
| Income (1939) | 654 |
| Highest Grade | Hs 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 2 locations, using XGBoost record linkage. Identified parents: father Preston Campbell (~0.92 confidence) and father Preston Campbell (~0.92 confidence) and father Preston Campbell (~0.92 confidence) and mother Mary Campbell (~0.92 confidence) and mother Mary Campbell (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Preston Campbell
b. ~1894
Source father
● Household
· direct · ~0.92
Father
Preston Campbell
b. ~1893
Source father
● Household
· direct · ~0.92
Father
Preston Campbell
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Mary Campbell
b. ~1901
Source mother
● Household
· direct · ~0.92
Mother
Mary Campbell
b. ~1902
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Campbell
Son · 1940 · age 21 · b. ~1919 · Maryland
★ You are viewing this record
Sibling
Mildred Campbell
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Preston Campbell
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Audrey Campbell
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
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
40 people indexed on this census page (nara:1940:m-t0627-01512-00671)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Isadore Gordon | 37 | Head | — | South Carolina |
| 2 | Pensacola Gordon | 19 | Daughter | — | South Carolina |
| 3 | Melvadi Gordon | 17 | Son | — | South Carolina |
| 4 | Channie Thompson | 57 | Mother | — | South Carolina |
| 5 | Melvadi Thompson | 36 | Cousin | Unskilled Labor | South Carolina |
| 6 | Frazier Robinson | 22 | Cousin | Unskilled Labor | South Carolina |
| 7 | Arthur Walker | 30 | Head | Unskilled Labor | Virginia |
| 8 | Beulah Walker | 33 | Wife | — | North Carolina |
| 9 | Irene Walker | 3 | Daughter | — | Maryland |
| 10 | Preston E. Campbell | 46 | Head | Janitor | Maryland |
| 11 | Mary Campbell | 38 | Wife | Charwoman | Maryland |
| 12 | Preston Jr. Campbell | 23 | Son | Cleaner | Maryland |
| 13 | Harry Campbell THIS PERSON | 21 | Son | Tailor | Maryland |
| 14 | Mildred Campbell | 19 | Son | — | Maryland |
| 15 | Audrey Campbell | 17 | Daughter | — | Maryland |
| 16 | Hugh White | 46 | Head | Takeoff | Florida |
| 17 | Mary White | 35 | Wife | — | Maryland |
| 18 | Ben Felton | 63 | Lodger | — | Virginia |
| 19 | Willie Galam | 50 | Head | Unskilled Labor | South Carolina |
| 20 | Elizabeth Galam | 45 | Wife | Housework | South Carolina |
| 21 | Homer Irwin | 26 | Son-in-law | Unskilled Labor | South Carolina |
| 22 | Mattie Irwin | 24 | Daughter | — | South Carolina |
| 23 | Sadie Watkins | 25 | Daughter | — | South Carolina |
| 24 | Dolly Mae Irwin | 4 | Daughter | — | Maryland |
| 25 | Homer Jr. Irwin | 2 | Son | — | Maryland |
| 26 | Harry Jones | 40 | Head | Porter | Maryland |
| 27 | Paul Jones | 20 | Son | New Worker | Maryland |
| 28 | Elizabeth Jones | 18 | Daughter | — | Maryland |
| 29 | Harry Jones | 16 | Son | New Worker | Maryland |
| 30 | Elsie Jones | 14 | Daughter | — | Maryland |
| 31 | Gordon Jones | 11 | Son | — | Maryland |
| 32 | William Mondowney | 39 | Brother-in-law | Unskilled Labor | Maryland |
| 33 | Carrie Mondowney | 12 | Aunt | — | Maryland |
| 34 | Mamie Mondowney | 52 | Mother-in-law | Housework | Maryland |
| 35 | John Saunders | 12 | Ward | — | Maryland |
| 36 | Charles Williams | 52 | Head | Porter | Virginia |
| 37 | Claire Williams | 50 | Wife | Maid | Virginia |
| 38 | William Elanza | 25 | Head | Farm Laborer | Virginia |
| 39 | Estella Elanza | 26 | Wife | Farm Laborer | Virginia |
| 40 | Isaac Seidel | 50 | Head | Tailor | Lithuania |
Pedigree Summary
Harry + 3 siblings
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)