JC
James Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this James Clark across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed), with identified parents Harry & Harry — first a son (b.~1916), then head of a 3-person household.
Age 24
b. ~1916
Male
Son
Born: Maryland
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Clark |
| Given Name | James M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Balto City |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Crane operator |
| Industry | Brass Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1120 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Crane Operator |
| Township / Ward | Balto City |
| Est. Birth Year | ~1916 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Harry Clark | Head | — | 57 | ~1883 |
| James Clark | Son | — | 24 | ~1916 |
| Margaret Clark | Spouse | — | 50 | ~1890 |
Census Appearances
1920
Baltimore, Maryland
Son, age 4
Baltimore, Maryland · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | James M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
Baltimore, Maryland
Son, age 14
Baltimore, Maryland · implied b. ~1916 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | James M. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Son, age 24
Baltimore-City-County, Maryland · implied b. ~1916 — 3 household members
| Surname | Clark |
| Given Name | James M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Maryland |
| 1935 Residence (City) | Balto City |
| 1935 Residence (County) | Baltimore City |
| Occupation | Crane operator |
| Industry | Brass Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1120 |
| Highest Grade | No 7 |
| 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 James Clark across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Clark (~0.92 confidence) and father Harry Clark (~0.92 confidence) and father Harry Clark (~0.92 confidence) and mother Margaret Clark (~0.92 confidence) and mother Margaret Clark (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Clark
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Harry Clark
b. ~1890
Source father
● Household
· direct · ~0.92
Father
Harry Clark
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Margaret Clark
b. ~1890
Source mother
● Household
· direct · ~0.92
Mother
Margaret Clark
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Clark
Son · 1940 · age 24 · b. ~1916 · 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
39 people indexed on this census page (nara:1940:m-t0627-01535-00611)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary J. Hay | 52 | Head | — | Maryland |
| 42 | Edward Hay | 20 | Son | Chauffeur | Maryland |
| 43 | Bernard Schwartz | 72 | Lodger | Night Watchman | Maryland |
| 44 | William E. Booley | Bailey | 58 | Head | Day Watchman | Maryland |
| 45 | Katie D. Booley | Bailey | 65 | Wife | — | Maryland |
| 47 | Littleton R. Benton | 30 | Head | Stationary Engineer | Maryland |
| 48 | Edna D. Benton | 35 | Wife | — | Maryland |
| 49 | William H. Mitchell | 69 | Head | Laborer | Maryland |
| 50 | Elizabeth D. Mitchell | 60 | Wife | — | Maryland |
| 51 | Carroll Smith | 48 | Head | Proprietor | Maryland |
| 52 | Lucille D. Smith | 44 | Wife | — | Maryland |
| 53 | John W. Smith | 60 | Brother | — | Maryland |
| 54 | William J. Clark | 27 | Head | Crane Operator | Maryland |
| 55 | Victoria Clark | 27 | Wife | — | Maryland |
| 56 | John J. Clark | 2 | Son | — | Maryland |
| 57 | Margaret T. Clark | 1 | Daughter | — | Maryland |
| 58 | Rose Akers | 49 | Head | — | Maryland |
| 59 | Thelma D. Thiel | 33 | Head | Laborer | Maryland |
| 60 | Catherine Thiel | 14 | Daughter | — | Maryland |
| 61 | James Thiel | 12 | Son | — | Maryland |
| 62 | Albert Crowley | 57 | Head | Clerk | Maryland |
| 63 | Artie Crowley | 52 | Wife | — | Virginia |
| 64 | Earl E. Grispers | Crispers | 38 | Head | Press Operator | Maryland |
| 65 | Mary E. Grispers | Crispers | 26 | Wife | — | Maryland |
| 66 | Joseph E. Grispers | Crispers | 5 | Son | — | Maryland |
| 67 | William J. Grispers | Crispers | 1 | Son | — | Maryland |
| 68 | John W. Haggerty | 23 | Head | Laborer | Pennsylvania |
| 69 | Bertha E. Haggerty | 18 | Wife | — | Maryland |
| 70 | Patricia A. Haggerty | 2 | Daughter | — | Maryland |
| 71 | Bertha X. Blum | 56 | Head | Pits Cherries | Germany |
| 72 | Louis J. Thalcosky | Thalcosky | 23 | Head | Helper | Pennsylvania |
| 73 | Mary M. Thalcosky | Thalcosky | 24 | Wife | Operator | Virginia |
| 74 | John J. Hanley | 47 | Head | Millwright | Maryland |
| 75 | Carrie S. Hanley | 46 | Wife | — | Maryland |
| 76 | Mary L. Hanley | 21 | Daughter | General Worker | Maryland |
| 77 | Marie E. Cos | 72 | Head | — | Hungary |
| 78 | Harry J. Clark | 57 | Head | Lieutenant | Maryland |
| 79 | Margaret Clark | 50 | Wife | — | Maryland |
| 80 | James M. Clark THIS PERSON | 24 | Son | Crane Operator | Maryland |
Pedigree Summary
James
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)