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Joseph Mccarthy — 1940 US Census Record
Model Tree available1940 United States Federal Census · Mercer-County, New Jersey
Our Model Tree links this Joseph Mccarthy across the 1920, 1930 and 1940 US Censuses in Mercer-County, New Jersey (XGBoost, ~Confirmed), with identified parents James & James — first a son (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Male
Son
Born: New Jersey
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Mercer-County, New Jersey |
| Surname | McCarthy |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Princeton |
| 1935 Residence (County) | Mercer |
| Additional Details | |
| Occupation | Salesman |
| Industry | Life Insurance |
| Class of Worker | PW |
| Hours Worked | 41 |
| Income (1939) | 300 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
| Occupation | Salesman |
| Township / Ward | Princeton |
| Est. Birth Year | ~1913 |
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 Joseph | Age | Birth yr |
|---|---|---|---|---|
| Joseph Mccarthy | Son | — | 27 | ~1913 |
| Charles Mccarthy | Son | — | 22 | ~1918 |
| Donald Mccarthy | Son | — | 31 | ~1909 |
| James Mccarthy | Head | — | 56 | ~1884 |
| Helen Mccarthy | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Mercer, New …
Son, age 7
Mercer, New Jersey · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Pennsylvania |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1930
Mercer, New …
Son, age 17
Mercer, New Jersey · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | New Jersey |
| Father's Birthplace | New Jersey |
| Mother's Birthplace | Pennsylvania |
| Can Read/Write | Yes |
| Birth State | New Jersey |
| Birth Country | United States |
| Birthplace (normalized) | new jersey |
1940
Mercer-County, New …
Son, age 27
Mercer-County, New Jersey · implied b. ~1913 — 5 household members
| Surname | McCarthy |
| Given Name | Joseph |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | New Jersey |
| 1935 Residence (City) | Princeton |
| 1935 Residence (County) | Mercer |
| Occupation | Salesman |
| Industry | Life Insurance |
| Class of Worker | PW |
| Hours Worked | 41 |
| Income (1939) | 300 |
| Highest Grade | C 2 |
| 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 Joseph Mccarthy across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Mccarthy (~0.92 confidence) and father James Mccarthy (~0.92 confidence) and mother Helen Mccarthy (~0.92 confidence) and mother Helen Mccarthy (~0.92 confidence) and father James Mccarthy (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mccarthy
b. ~1884
Source father
● Household
· direct · ~0.92
Father
James Mccarthy
b. ~1884
Source father
● Household
· direct · ~0.92
Mother
Helen Mccarthy
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Helen Mccarthy
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
James Mccarthy
b. ~1885
Source father
● Household
· direct · ~0.92
This person
Anchor record
Joseph Mccarthy
Son · 1940 · age 27 · b. ~1913 · New Jersey
★ You are viewing this record
Sibling
Charles Mccarthy
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Donald Mccarthy
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
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-t0627-02357-00553)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Lillian T. Reardon | 31 | Head | Stenographer | New Jersey |
| 42 | Torjus Thorsen | 33 | Head | House Man | Norway |
| 43 | Betsy Thorsen | 32 | Wife | — | Illinois |
| 44 | Janet Thorsen | 1 | Daughter | — | New York |
| 45 | Joseph Lopez | 33 | Head | Constr. Engineer | Cuba |
| 46 | Margaret Lopez | 28 | Wife | Teacher | New Jersey |
| 47 | Eva Brooks | 56 | Head | Librarian | Pennsylvania |
| 48 | Mary Brooks | 81 | Mother | — | England |
| 49 | Sarah Brooks | 49 | Sister | Nurse | Pennsylvania |
| 50 | Harold Brooker | 39 | Head | Salesman | New Jersey |
| 51 | Lillian Mae Brooker | 41 | Wife | Stenographer | New Jersey |
| 52 | Marjorie Brooker | 15 | Daughter | — | New Jersey |
| 53 | Isabel F. Streeper | 73 | Head | — | New York |
| 54 | Walter L. Whittlesey | 61 | Head | Professor | California |
| 55 | Louise B. Whittlesey | 58 | Wife | — | Missouri |
| 56 | John K. Whittlesey | 23 | Son | Research Engineer | New York |
| 57 | Elinor Whittlesey | 19 | Daughter | — | New Jersey |
| 58 | Robert B. Whittlesey | 18 | Son | Librarian | Connecticut |
| 59 | Faith Whittlesey | 16 | Daughter | — | New Jersey |
| 60 | Donald Clemens | 3 | Roomer | — | Virginia |
| 61 | Elwilda B. Updike | 83 | Head | — | New Jersey |
| 62 | Helen R. Updike | 64 | Daughter | Librarian | New Jersey |
| 63 | Elizabeth M. Updike | 51 | Daughter | Stenographer | New Jersey |
| 64 | Stella Musser Hubbard | 65 | Head | — | New Jersey |
| 65 | Marion M. Hubbard | 37 | Daughter | — | New Jersey |
| 66 | Alvan H. Hubbard | 31 | Son | — | New Jersey |
| 67 | Lizzie T. Hubbard | 75 | Sister in law | — | New Jersey |
| 68 | J. Brookes Knight | 52 | Head | Curator | Missouri |
| 69 | Madge Knight | 47 | Wife | — | Missouri |
| 70 | Judy B. Knight | 20 | Daughter | — | Missouri |
| 71 | James Jr. Knight | 18 | Son | — | Missouri |
| 72 | James A. Mccarthy | 56 | Head | Supervisor | New Jersey |
| 73 | Helen G. Mccarthy | 55 | Wife | — | Pennsylvania |
| 74 | Donald Mccarthy | 31 | Son | Salesman | New Jersey |
| 75 | Joseph Mccarthy THIS PERSON | 27 | Son | Salesman | New Jersey |
| 76 | Charles Mccarthy | 22 | Son | Clerk | New Jersey |
| 77 | Ellen Q. Majinnic | 70 | Head | — | New Jersey |
| 78 | Florence Majinnic | 49 | Daughter | Stenographer | New Jersey |
| 79 | Julia F. Housel | 61 | Head | — | New Jersey |
| 80 | Myrtle Housel | 41 | Daughter | Nurse | New Jersey |
Pedigree Summary
Joseph + 2 siblings
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)