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John Cox — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this John Cox across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1895), then head of a 11-person household.
Age 45
b. ~1895
Male
Head
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Cox |
| Given Name | John R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Mercer |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Electrician |
| Industry | Insane Asylum |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 2400 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Electrician |
| Est. Birth Year | ~1895 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Patricia Cox | Daughter | — | 13 | ~1927 |
| Kathryn Cox | Daughter | — | 6 | ~1934 |
| Betty Cox | Daughter | — | 21 | ~1919 |
| Dorothy Cox | Daughter | — | 8 | ~1932 |
| Miriam Cox | Daughter | — | 19 | ~1921 |
| Sally Cox | Daughter | — | 10 | ~1930 |
| John Cox | Head | — | 45 | ~1895 |
| Melvin Cox | Son | — | 9 | ~1931 |
| W Cox | Son | — | 25 | ~1915 |
| John Cox | Son | — | 20 | ~1920 |
| Gertrude Cox | Spouse | — | 44 | ~1896 |
Census Appearances
1920
Mercer, New …
Head, age 25
Mercer, New Jersey · implied b. ~1895 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | John W. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Father's Birthplace | United States |
| Mother's Birthplace | United States |
| Occupation | Electrician |
| Industry | House N. W. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Mercer, New …
Head, age 36
Mercer, New Jersey · implied b. ~1894 — 17 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cox |
| Given Name | John E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 36 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 18 |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Ireland |
| Occupation | Electrician |
| Industry | Hospital |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | Un |
| Radio Set | R |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Head, age 45
Mercer-County, New Jersey · implied b. ~1895 — 11 household members
| Surname | Cox |
| Given Name | John R. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Mercer |
| 1935 Residence (County) | Mercer |
| Occupation | Electrician |
| Industry | Insane Asylum |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 2400 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| 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 Cox across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Cox
Head · 1940 · age 45 · b. ~1895 · New Jersey
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Mercer-County, New Jersey
Open full size
1940 US Federal Census — Mercer-County, New Jersey
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02437-00411)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Rachel Gros | 66 | Mother in Law | — | Pennsylvania |
| 42 | Charles Ford | 47 | Head | Upholsterer | New Jersey |
| 43 | Sarah Ford | 45 | Wife | — | Pennsylvania |
| 44 | Anna R. Ford | 26 | Daughter | Stenographer | New Jersey |
| 45 | Evelyn Ford | 16 | Daughter | — | New Jersey |
| 46 | Janet Ford | 6 | Daughter | — | New Jersey |
| 47 | Frank Umstead | 72 | Father in Law | Carriage Painter | Pennsylvania |
| 48 | Eva Umstead | 72 | Mother in Law | — | New York |
| 49 | Fred Van Tassel | 65 | Head | Storekeeper | New York |
| 50 | Cora Van Tassel | 60 | Wife | — | New York |
| 51 | Carl S. Race | 40 | Head | Farm Supt. | New Jersey |
| 52 | Flora Race | 42 | Wife | — | New Jersey |
| 53 | Virginia Race | 13 | Daughter | — | New Jersey |
| 54 | Lois Jane Race | 9 | Daughter | — | New Jersey |
| 55 | Carl J. Race | 5 | Son | — | New Jersey |
| 56 | Mary L. Race | 21 | Niece | Home Demonst. Agent | New Jersey |
| 57 | John R. Cox THIS PERSON | 45 | Head | Electrician | New Jersey |
| 58 | Gertrude E. Cox | 44 | Wife | — | New Jersey |
| 59 | W. Lawrence Cox | 25 | Son | Electrician | New Jersey |
| 60 | Betty Cox | 21 | Daughter | — | New Jersey |
| 61 | John Jr. Cox | 20 | Son | — | New Jersey |
| 62 | Miriam E. Cox | 19 | Daughter | — | New Jersey |
| 63 | Patricia Cox | 13 | Daughter | — | New Jersey |
| 64 | Sally A. Cox | 10 | Daughter | — | New Jersey |
| 65 | Melvin Cox | 9 | Son | — | New Jersey |
| 66 | Dorothy Cox | 8 | Daughter | — | New Jersey |
| 67 | Kathryn Cox | 6 | Daughter | — | New Jersey |
| 68 | Elmer Miller | 28 | Head | Salesman | New Jersey |
| 69 | Nellie E. Miller | 25 | Wife | — | New Jersey |
| 70 | William Chiswick | 69 | Father in Law | Florist | New Jersey |
| 71 | Nellie E. Chiswick | 55 | Mother in Law | — | New Jersey |
| 72 | Thomas Coleman | 46 | Head | Steam-Fitter | New Jersey |
| 73 | Alice Coleman | 41 | Wife | — | New Jersey |
| 74 | Elizabeth Coleman | 18 | Daughter | — | New Jersey |
| 75 | Thomas Coleman | 16 | Son | — | New Jersey |
| 76 | Patricia Coleman | 12 | Daughter | — | New Jersey |
| 77 | James Coleman | 8 | Son | — | New Jersey |
| 78 | Robert Coleman | 1 | Son | — | New Jersey |
| 79 | William Cox | 69 | Head | Prin. Clk. Bookkeeper | New Jersey |
| 80 | Eva Cox | 66 | Wife | — | New Jersey |
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)