WC
William Carroll — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this William Carroll across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed) — first a head (b.~1872), then head of a 5-person household.
Age 68
b. ~1872
Male
Head
Born: New Jersey
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | Carroll |
| Given Name | William J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton city |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Farmer |
| Industry | Own Farm |
| Class of Worker | OA |
| Hours Worked | 52 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Farmer |
| Township / Ward | Trenton City |
| Est. Birth Year | ~1872 |
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 William | Age | Birth yr |
|---|---|---|---|---|
| Nellie Carroll | Daughter | — | 21 | ~1919 |
| William Carroll | Head | — | 68 | ~1872 |
| John Malloy | Other | — | 64 | ~1876 |
| Edith Rosell | Other | — | 33 | ~1907 |
| Mary Carroll | Spouse | — | 61 | ~1879 |
Census Appearances
1920
Mercer, New …
Head, age 45
Mercer, New Jersey · implied b. ~1875 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | William J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Farmer |
| Industry | General Farm |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| 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 56
Mercer, New Jersey · implied b. ~1874 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | William J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | New Jersey |
| Age at First Marriage | 25 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Farmer |
| Industry | Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Head, age 68
Mercer-County, New Jersey · implied b. ~1872 — 5 household members
| Surname | Carroll |
| Given Name | William J |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | New Jersey |
| 1935 Residence (City) | Trenton city |
| 1935 Residence (County) | Mercer |
| Occupation | Farmer |
| Industry | Own Farm |
| Class of Worker | OA |
| Hours Worked | 52 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| 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 William Carroll across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
William Carroll
Head · 1940 · age 68 · b. ~1872 · 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 — 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-t0627-02437-00218)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank J Malloy | 46 | Head | Appraiser | New Jersey |
| 42 | John C Malloy | 40 | Brother | Auditor | New Jersey |
| 43 | James J Malloy | 42 | Brother | Clerk | New Jersey |
| 44 | Edward P Malloy | 37 | Brother | Surveyor Asst | New Jersey |
| 45 | Frank Jr Malloy | 21 | P | Clerk | New Jersey |
| 46 | Anne R Malloy | 50 | Sister | — | New Jersey |
| 47 | Frank E Weeden | 65 | Head | Grocery Store | New Jersey |
| 48 | Mary R Weeden | 65 | Wife | — | New Jersey |
| 49 | Anna Barry | 65 | Cousin | — | New Jersey |
| 50 | Harry Langdon | 43 | Lodger | Sawyer | New Jersey |
| 51 | Charles Werman | 60 | Head | Accountant | New York |
| 52 | Elizabeth Werman | 50 | Wife | — | New York |
| 53 | Walter G Werman | 25 | Son | Clerk | New York |
| 54 | William J Carroll THIS PERSON | 68 | Head | Farmer | New Jersey |
| 55 | Mary V Carroll | 61 | Wife | — | New Jersey |
| 56 | Nellie H Carroll | 21 | Daughter | Telephone Opr | New Jersey |
| 57 | John Malloy | 64 | Lodger | Accountant | New Jersey |
| 58 | Edith Rosell | 33 | Lodger | Clerk | New Jersey |
| 59 | Abraham Schuerman | 53 | Head | Plumber | New Jersey |
| 60 | Elizabeth A Schuerman | 50 | Wife | — | New Jersey |
| 61 | David C Pollock | 32 | Head | Manager | Pennsylvania |
| 62 | Minnie E Pollock | 32 | Wife | M Clerk | New Jersey |
| 63 | Alex R Schulman | 36 | Head | P. | New Jersey |
| 64 | Minnie R Schulman | 32 | Wife | — | New Jersey |
| 65 | Abraham Swinnerton | 32 | Head | Clerk | New Jersey |
| 66 | Harriet Swinnerton | 27 | Wife | — | New Jersey |
| 67 | Norman B Swinnerton | 1 | Son | — | New Jersey |
| 68 | John Diehl | 66 | Head | Utility Man | New Jersey |
| 69 | Christine H Diehl | 62 | Wife | — | New Jersey |
| 70 | Joseph T Arnold | 40 | Son | Salesman | New Jersey |
| 71 | Harry C Arnold | 35 | Son | Clerk | New Jersey |
| 72 | Theodore Janick | 35 | Lodger | Accountant | New Jersey |
| 73 | Catherine M Clarke | 47 | Head | — | Pennsylvania |
| 74 | Peter F Clarke | 26 | Son | Shipping Clerk | New Jersey |
| 75 | Charles D Clarke | 22 | Son | Stock Clerk | New Jersey |
| 76 | John J Clarke | 19 | Son | Helper Kitchen | New Jersey |
| 77 | William A Harris | 42 | Boarder | Packer | New Jersey |
| 78 | Ernest Qualest | 27 | Boarder | Packer | New Jersey |
| 79 | Samuel Blake | 29 | Boarder | Packer | New Jersey |
| 80 | Charles Westman | 50 | Head | Decorator | Russia |
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)