JC
John Clark — 1940 US Census Record
Model Tree available1940 United States Federal Census · Morris-County, New Jersey
Our Model Tree links this John Clark across the 1920, 1930 and 1940 US Censuses in Morris-County, New Jersey (XGBoost, ~Confirmed), with identified parents Charles & Mary — first a head (b.~1899), then head of a 3-person household.
Age 41
b. ~1899
Male
Head
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Morris-County, New Jersey |
| Surname | Clark |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Denville |
| 1935 Residence (County) | Morris |
| Additional Details | |
| Occupation | Manager |
| Industry | Bird hatchery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 431 |
| Highest Grade | No 7 |
| 1935 Residence | New Jersey |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Manager |
| Township / Ward | Rockaway Borough |
| Est. Birth Year | ~1899 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Clark | Head | — | 41 | ~1899 |
| John Clark | Son | — | 3 | ~1937 |
| Mary Clark | Spouse | — | 28 | ~1912 |
Census Appearances
1920
Morris, New …
Son, age 21
Morris, New Jersey · implied b. ~1899 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | John H A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Laborer |
| Industry | Rolling Mill |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Morris, New …
Son, age 31
Morris, New Jersey · implied b. ~1899 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | New Jersey |
| Occupation | Fireman |
| Industry | Fire Co |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Morris-County, New …
Head, age 41
Morris-County, New Jersey · implied b. ~1899 — 3 household members
| Surname | Clark |
| Given Name | John A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Denville |
| 1935 Residence (County) | Morris |
| Occupation | Manager |
| Industry | Bird hatchery |
| Class of Worker | PW |
| Hours Worked | 48 |
| Income (1939) | 431 |
| Highest Grade | No 7 |
| 1935 Residence | New Jersey |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
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 2 locations, using XGBoost record linkage. Identified parents: father Charles Clark (~0.92 confidence) and mother Mary Clark (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Clark
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Mary Clark
b. ~1873
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Clark
Head · 1940 · age 41 · b. ~1899 · New Jersey
★ 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 — Morris-County, New Jersey
Open full size
1940 US Federal Census — Morris-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02373-00592)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Poland | None | — | — | — |
| 42 | Nancy Delano | 66 | Mother-in-law | — | New Jersey |
| 43 | Sarah B. Wiggins | 53 | Head | Office Manager | New Jersey |
| 44 | Daisy Wiggins | 57 | Sister | Principal | New Jersey |
| 45 | — | None | — | — | — |
| 46 | John Stuart Meddaugh | 27 | Son | Assistant Personnel Manager | Ohio |
| 47 | — | None | — | — | — |
| 48 | Edwin Reed | 49 | Head | Storekeeper Loading Dept | New Jersey |
| 49 | Marguerite Reed | 36 | Wife | — | New Jersey |
| 50 | Lois Reed | 21 | Daughter | Beautician | New Jersey |
| 51 | Emma Reed | 13 | Daughter | — | New Jersey |
| 52 | Robert Reed | 8 | Son | — | New Jersey |
| 53 | Frank Simon | 44 | Head | Timber Man | Hungary |
| 54 | Christina Simon | 44 | Wife | — | Jugo-Slavia |
| 55 | — | None | — | — | — |
| 56 | Frederick Lake | 33 | Head | Helper On Furnace | New Jersey |
| 57 | Marjorie Lake | 31 | Wife | Topper | New Jersey |
| 58 | Frederick John Lake | 8 | Son | — | New Jersey |
| 59 | Joan Ann Lake | 6 | Daughter | — | New Jersey |
| 60 | — | None | — | — | — |
| 61 | Edward Tippett | 63 | Head | Janitor | New Jersey |
| 62 | Catherine Tippett | 66 | Wife | — | New York |
| 63 | — | None | — | — | — |
| 64 | Dessie Steele | 65 | Head | — | Pennsylvania |
| 65 | — | None | — | — | — |
| 66 | John A. Clark THIS PERSON | 41 | Head | Manager | New Jersey |
| 67 | Mary Clark | 28 | Wife | Helper | Pennsylvania |
| 68 | John Jr. Clark | 3 | Son | — | New Jersey |
| 69 | Charles Gernert | Gernerd | 58 | Head | Explosive Operator | Germany |
| 70 | Susan B. Gernert | Gernerd | 46 | Wife | Explosive Operator | New Jersey |
| 71 | — | None | — | — | — |
| 72 | Olga Williams | 32 | Head | Milliner | New Jersey |
| 73 | Earl Post | 30 | Head | Carpenter | New Jersey |
| 74 | Dora Post | 29 | Wife | — | New Jersey |
| 75 | — | None | — | — | — |
| 76 | Laura B. Dorman | 60 | Head | — | New Jersey |
| 77 | Joseph Concialdi | 43 | Head | Representative | New York |
| 78 | Grace Concialdi | 51 | Wife | — | New Jersey |
| 79 | — | None | — | — | — |
| 80 | Abraham A. Meyerson | 69 | Head | Owner - Manager | Russia |
Pedigree Summary
John
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)