JC
Joseph Carroll — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this Joseph Carroll across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Bernard & Ernest — first a son (b.~1920), then head of a 5-person household.
Age 20
b. ~1920
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Carroll |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | File Clerk |
| Industry | Sewer's Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 500 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | File Clerk |
| Township / Ward | Baltimore City |
| Est. Birth Year | ~1920 |
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 Joseph | Age | Birth yr |
|---|---|---|---|---|
| Marie Carroll | Spouse | — | 46 | ~1894 |
| Joseph Carroll | Son | — | 20 | ~1920 |
| Mary Mager | Other | — | 67 | ~1873 |
| Virginia Carroll | Other | — | 80 | ~1860 |
| Ernest Carroll | Head | — | 46 | ~1894 |
Census Appearances
1920
Baltimore, Maryland
Son, age
Baltimore, Maryland · implied b. ~1920 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Joseph J. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Ireland |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 10
Baltimore, Maryland · implied b. ~1920
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Carroll |
| Given Name | Joseph B |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Irish Free State |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 20
Baltimore-City-County, Maryland · implied b. ~1920 — 5 household members
| Surname | Carroll |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore City |
| 1935 Residence (County) | Baltimore City |
| Occupation | File Clerk |
| Industry | Sewer's Office |
| Class of Worker | GW |
| Hours Worked | 40 |
| Income (1939) | 500 |
| 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 Joseph Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Bernard Carroll (~0.92 confidence) and father Ernest Carroll (~0.92 confidence) and mother Delia Carroll (~0.92 confidence) and mother Marie Carroll (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Bernard Carroll
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Ernest Carroll
b. ~1894
Source father
● Household
· direct · ~0.92
Mother
Delia Carroll
b. ~1896
Source mother
● Household
· direct · ~0.92
Mother
Marie Carroll
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Joseph Carroll
Son · 1940 · age 20 · b. ~1920 · 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
40 people indexed on this census page (nara:1940:m-t0627-01515-00151)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Violet Riggs | 32 | Wife | Telephone Operator | Maryland |
| 2 | Barbara Emerald | 46 | Head | — | Germany |
| 3 | Charles Emerald | 45 | Son | Workman | Maryland |
| 4 | Henrietta Spedden | 35 | Daughter | — | Maryland |
| 5 | Vernon Spedden | 13 | Son | — | Maryland |
| 6 | Emerald Spedden | 3 | Son | — | Maryland |
| 7 | William Thompson | 42 | Head | Clergyman | Maryland |
| 8 | Mildred Thompson | 40 | Wife | Stenographer | New York |
| 9 | Jule Thompson | 18 | Daughter | Sales Girl | Maryland |
| 10 | Lucille Thompson | 14 | Daughter | — | Pennsylvania |
| 11 | Alice Thompson | 12 | Daughter | — | New Jersey |
| 12 | Florence Thompson | 73 | Mother | — | Maryland |
| 13 | Nidouelle Thompson | 49 | Sister | Filing | Maryland |
| 14 | Richard D. Davis | 70 | Head | Painter | Maryland |
| 15 | Ella B. Davis | 66 | Wife | — | Maryland |
| 16 | Calvin Davis | 38 | Son | Laborer | Maryland |
| 17 | Dorothy Davis | 25 | Daughter | Sales Lady | Maryland |
| 18 | Rose Habercam | 77 | Head | — | Pennsylvania |
| 19 | Frank Habercam | 52 | Son | — | Maryland |
| 20 | Lillie Habercam | 46 | Daughter | Foreman | Maryland |
| 21 | Annie Nelson | 86 | Head | Housewife | Germany |
| 22 | Horace Belt | 49 | Head | — | Maryland |
| 23 | Vernon Belt | 19 | Son | Sales Lady | D.C. |
| 24 | Charles Belt | 18 | Son | Stock Clerk | Maryland |
| 25 | Roland Belt | 17 | Son | — | Maryland |
| 26 | Ernest J. Carroll | 46 | Head | Motorman | Maryland |
| 27 | Marie Carroll | 46 | Wife | Operator | Maryland |
| 28 | Joseph Carroll THIS PERSON | 20 | Son | File Clerk | Maryland |
| 29 | Virginia Carroll | 80 | Aunt | — | Maryland |
| 30 | Mary K. Mager | 67 | Mother | — | Maryland |
| 31 | Marie Almoney | 67 | Head | — | Maryland |
| 32 | Catherine Almoney | 64 | Sister | — | Maryland |
| 33 | Joseph Schuch | 40 | Head | Fireman | Maryland |
| 34 | Catherine Schuch | 38 | Wife | — | Maryland |
| 35 | Dorothy Schuch | 19 | Daughter | — | Maryland |
| 36 | Thomas Schuch | 9 | Son | — | Maryland |
| 37 | Kathleen Schuch | 8 | Daughter | — | Maryland |
| 38 | James Schuch | 62 | Father | — | Maryland |
| 39 | Elmer Bauman | 33 | Head | S. Operator | Maryland |
| 40 | Dorothy Bauman | 33 | Wife | — | Maryland |
Pedigree Summary
Joseph
Gen 1 · 4 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)