JC
John Clark — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Baltimore-City-County, Maryland
Our Model Tree links this John Clark across the 1920, 1930 and 1940 US Censuses in Baltimore-City-County, Maryland (XGBoost, ~Confirmed) — first a head (b.~1903), then head of a 6-person household.
Age 37
b. ~1903
Male
Head
Born: Maryland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Baltimore-City-County, Maryland |
| Surname | Clark |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Additional Details | |
| Occupation | Crane Operator |
| Industry | Gun Powder |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H 1 |
| 1935 Residence | Same house |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
| Occupation | Crane Operator |
| Township / Ward | Baltimore |
| Est. Birth Year | ~1903 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Dorothy Clark | Daughter | — | 17 | ~1923 |
| Lorraine Clark | Daughter | — | 8 | ~1932 |
| Louise Clark | Daughter | — | 4 | ~1936 |
| John Clark | Head | — | 37 | ~1903 |
| John Clark | Son | — | 14 | ~1926 |
| Anna Clark | Spouse | — | 35 | ~1905 |
Census Appearances
1920
Baltimore, Maryland
Son, age 17
Baltimore, Maryland · implied b. ~1903 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Maryland |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Driver |
| Industry | Wagon |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1930
None, Maryland
Head, age 27
None, Maryland · implied b. ~1903 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | John N. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Maryland |
| Age at First Marriage | 22 |
| Father's Birthplace | Maryland |
| Mother's Birthplace | Maryland |
| Occupation | Chauffeur |
| Industry | Taxicab |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Radio Set | R |
| Veteran | no |
| Birth State | Maryland |
| Birth Country | United States |
| Birthplace (normalized) | maryland |
1940
Baltimore-City-County, Maryland
Head, age 37
Baltimore-City-County, Maryland · implied b. ~1903 — 6 household members
| Surname | Clark |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Maryland |
| 1935 Residence (City) | Baltimore |
| 1935 Residence (County) | Baltimore City |
| Occupation | Crane Operator |
| Industry | Gun Powder |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1560 |
| Highest Grade | H 1 |
| 1935 Residence | Same house |
| 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 Clark across 3 US Census years (1920, 1930 and 1940) in 3 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Clark
Head · 1940 · age 37 · b. ~1903 · 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-t0627-01536-00681)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Pauline Kneavel | 1 | Granddaughter | — | Maryland |
| 42 | Charles Schaeffer | 49 | Head | Bartender | Virginia |
| 43 | Pauline Schaeffer | 39 | Wife | — | Virginia |
| 44 | Roy Porter | 39 | Lodger | — | Indiana |
| 45 | Andrew Cousin | 43 | Head | Conductor | Lithuania |
| 46 | Mary Cousin | 36 | Wife | — | Massachusetts |
| 47 | Philly Cousin | 15 | Son | — | Maryland |
| 48 | Matthew Stanavich | 22 | Son-in-law | Fireman | Illinois |
| 49 | Bertha Stanavich | 17 | Daughter | — | Maryland |
| 50 | Ignac Polanskas | 55 | Head | — | Lithuania |
| 51 | Margaret Polanskas | 45 | Wife | — | Lithuania |
| 52 | Edward Polanskas | 24 | Son | Ironworker | Maryland |
| 53 | Ernest Polanskas | 21 | Son | — | Maryland |
| 54 | Charles Raguckas | 56 | Head | Barber | Lithuania |
| 55 | Albina Nakusas | 19 | Daughter | Machine Oper. | Maryland |
| 56 | Frank Nakusas | 12 | Son-in-law | — | Maryland |
| 57 | Lily Raguckas | 15 | Daughter | — | Maryland |
| 58 | Vilma Raguckas | 11 | Daughter | — | Maryland |
| 59 | George Mikalajunas | 75 | Lodger | — | Lithuania |
| 60 | Harry Stone | 31 | Head | Laborer | Poland |
| 61 | Wanda Stone | 30 | Wife | Machine Oper. | New York |
| 62 | Adalbert Schmidt | 22 | Head | Millrode | Maryland |
| 63 | Mary Schmidt | 22 | Wife | — | Pennsylvania |
| 64 | Jacob Ragutakas | 60 | Head | Tailor | Lithuania |
| 65 | Annie Ragutakas | 58 | Wife | — | Lithuania |
| 66 | John Ridger | 36 | Lodger | Lorerpiper | Ohio |
| 67 | John Cuglowoski|Cuglowski | 45 | Head | Boat Scaler | Poland |
| 68 | Lottie Cuglowoski|Cuglowski | 43 | Wife | — | Poland |
| 69 | Stella Cuglowoski|Cuglowski | 23 | Daughter | Nurses Aide | Maryland |
| 70 | Eleanor Cuglowoski|Cuglowski | 16 | Daughter | — | Maryland |
| 71 | Casmer Cuglowoski|Cuglowski | 14 | Son | — | Maryland |
| 72 | John Clark THIS PERSON | 37 | Head | Crane Operator | Maryland |
| 73 | Anna Clark | 35 | Wife | Tailoring | Boston |
| 74 | Dorothy Clark | 17 | Daughter | — | Maryland |
| 75 | John C. Clark | 14 | Son | — | Maryland |
| 76 | Lorraine Clark | 8 | Daughter | — | Maryland |
| 77 | Louise Clark | 4 | Daughter | — | Maryland |
| 78 | Joseph Gabor | 60 | Head | Carpenter | Czechoslovakia |
| 79 | Margaret Gabor | 54 | Wife | — | Lithuania |
| 80 | William Gabor | 22 | Son | Pipefitter | 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)