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John Mahoney — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Worcester-County, Massachusetts
Our Model Tree links this John Mahoney across the 1920, 1930 and 1940 US Censuses in Worcester-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1897), then head of a 6-person household.
Age 43
b. ~1897
Male
Head
Born: New Hampshire
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Worcester-County, Massachusetts |
| Surname | Mahoney |
| Given Name | John T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Oxford |
| Additional Details | |
| Occupation | Machine Tool Manufacturing Co |
| Industry | PW |
| Class of Worker | 1500 |
| Highest Grade | Gr 8 |
| 1935 Residence | 45 |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Occupation | Machine Tool Manufacturing Co |
| Township / Ward | Worcester City |
| Est. Birth Year | ~1897 |
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 |
|---|---|---|---|---|
| Mary Mahoney | Daughter | — | 13 | ~1927 |
| John Mahoney | Head | — | 43 | ~1897 |
| John Mahoney | Son | — | 17 | ~1923 |
| Donald Mahoney | Son | — | 21 | ~1919 |
| Joseph Mahoney | Son | — | 19 | ~1921 |
| Viola Mahoney | Spouse | — | 42 | ~1898 |
Census Appearances
1920
Worcester, Massachusetts
Head, age 23
Worcester, Massachusetts · implied b. ~1897 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Riveter |
| Industry | Construction |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | New Hampshire |
| Birth Country | United States |
| Year of Naturalization | R |
| Birthplace (normalized) | new hampshire |
1930
Worcester, Massachusetts
Head, age 32
Worcester, Massachusetts · implied b. ~1898 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mahoney |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 32 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Age at First Marriage | 20 |
| Father's Birthplace | Ireland State |
| Mother's Birthplace | Ireland State |
| Occupation | shoe maker |
| Industry | shoe shop |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| Veteran | No |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Worcester-County, Massachusetts
Head, age 43
Worcester-County, Massachusetts · implied b. ~1897 — 6 household members
| Surname | Mahoney |
| Given Name | John T. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Oxford |
| Occupation | Machine Tool Manufacturing Co |
| Industry | PW |
| Class of Worker | 1500 |
| Highest Grade | Gr 8 |
| 1935 Residence | 45 |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 Mahoney 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 Mahoney
Head · 1940 · age 43 · b. ~1897 · Massachusetts
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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 — Worcester-County, Massachusetts
Open full size
1940 US Federal Census — Worcester-County, Massachusetts
Page Contents
10 people indexed on this census page (nara:1940:m-t0627-01714-00015)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 2 | John Olson | 24 | Head | Shipper | Canada-English |
| 3 | Emma Olson | 23 | Wife | 0 | Portland |
| 4 | Emma M. Olson | 4 | Daughter | — | Maine |
| 5 | John T. Olson | 2 | Son | — | Maine |
| 7 | John T. Mahoney THIS PERSON | 43 | Head | Machine Tool Manufacturing Co | New Hampshire |
| 8 | Viola A. Mahoney | 42 | Wife | — | New Hampshire |
| 9 | Donald M. Mahoney | 21 | Son | — | Massachusetts |
| 10 | Joseph E. Mahoney | 19 | Son | — | Massachusetts |
| 11 | John T. Jr. Mahoney | 17 | Son | — | New Hampshire |
| 12 | Mary M. Mahoney | 13 | Daughter | — | Massachusetts |
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)