JC
John Casey — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this John Casey across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Jeremiah & Michael — first a son (b.~1915), then head of a 9-person household.
Age 25
b. ~1915
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Woburn city |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Painter |
| Industry | Painting |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Painter |
| Township / Ward | Woburn City |
| Est. Birth Year | ~1915 |
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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Marie Casey | Daughter | — | 20 | ~1920 |
| Theresa Casey | Daughter | — | 26 | ~1914 |
| Mary Casey | Daughter | — | 30 | ~1910 |
| Jeremiah Casey | Head | — | 72 | ~1868 |
| Rose Casey | Other | — | 30 | ~1910 |
| Judith Casey | Other | — | 2 | ~1938 |
| John Casey | Son | — | 25 | ~1915 |
| George Casey | Son | — | 22 | ~1918 |
| Daniel Casey | Son | — | 33 | ~1907 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 4
Middlesex, Massachusetts · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 14
Middlesex, Massachusetts · implied b. ~1916 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 25
Middlesex-County, Massachusetts · implied b. ~1915 — 9 household members
| Surname | Casey |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Woburn city |
| 1935 Residence (County) | Middlesex |
| Occupation | Painter |
| Industry | Painting |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 1400 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Casey across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Jeremiah Casey (~0.92 confidence) and father Michael Casey (~0.92 confidence) and mother Annie Casey (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jeremiah Casey
b. ~1868
Source father
● Household
· direct · ~0.92
Father
Michael Casey
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Annie Casey
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Casey
Son · 1940 · age 25 · b. ~1915 · Massachusetts
★ You are viewing this record
Sibling
Theresa Casey
Sibling · 1940 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Casey
Sibling · 1940 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Casey
Sibling · 1940 · age 33
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Casey
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Casey
Sibling · 1940 · age 22
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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01622-00578)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Jeremiah Casey | 72 | Head | Janitor | Massachusetts |
| 2 | Mary Casey | 30 | Daughter | Clerk | Massachusetts |
| 3 | Theresa Casey | 26 | Daughter | Clerk | Massachusetts |
| 4 | John Casey THIS PERSON | 25 | Son | Painter | Massachusetts |
| 5 | George Casey | 22 | Son | — | Massachusetts |
| 6 | Marie Casey | 20 | Daughter | — | Massachusetts |
| 7 | Daniel Casey | 33 | Son | Plumber | Massachusetts |
| 8 | Rose Casey | 30 | Daughter-in-law | — | Massachusetts |
| 9 | Judith Casey | 2 | Granddaughter | — | Massachusetts |
| 10 | Ella Doherty | 58 | Head | — | Massachusetts |
| 11 | Frederick Doherty | 28 | Son | — | Massachusetts |
| 12 | John Doherty | 26 | Son | Chauffeur | Massachusetts |
| 13 | Robert Spencer | 25 | Head | Truck Driver | Massachusetts |
| 14 | Celeste Spencer | 19 | Wife | — | Massachusetts |
| 15 | Phillip Spencer | 37 | Uncle | Agent | Massachusetts |
| 16 | Rose Spencer | 35 | Aunt | — | Massachusetts |
| 17 | Rosemary Spencer | 10 | Niece | — | Massachusetts |
| 18 | Edward Doherty | 36 | Head | Clerk | Massachusetts |
| 19 | Anna Doherty | 34 | Wife | — | Massachusetts |
| 20 | Jean Doherty | 13 | Daughter | — | Massachusetts |
| 21 | Edward, Jr. Doherty | 12 | Son | — | Massachusetts |
| 22 | Nancy Doherty | 9 | Daughter | — | Massachusetts |
| 23 | Hugh Doherty | 7 | Son | — | Massachusetts |
| 24 | John Doherty | 4 | Son | — | Massachusetts |
| 25 | Thomas Bovaird | 39 | Head | Adjuster | Massachusetts |
| 26 | Margaret Bovaird | 31 | Wife | — | Massachusetts |
| 27 | June Bovaird | 8 | Daughter | — | Massachusetts |
| 28 | William Bovaird | 1 | Son | — | Massachusetts |
| 29 | Mary Bovaird | 62 | Mother | — | Massachusetts |
| 30 | John Lynch | 60 | Head | — | Massachusetts |
| 31 | Jenny Lynch | 66 | Wife | — | Massachusetts |
| 32 | Mary Lynch | 45 | Sister | Secretary | Massachusetts |
| 33 | Margaret Doherty | 65 | Sister-in-law | — | Massachusetts |
| 34 | Sadie Wynne | 56 | Head | Clerk | Massachusetts |
| 35 | Mary Wynne | 52 | Sister | Clerk | Massachusetts |
| 36 | George Bergin | 45 | Head | Machinist | Ireland |
| 37 | Emily Bergin | 44 | Wife | — | Ireland |
| 38 | George Bergin | 21 | Son | Clerk | Massachusetts |
| 39 | Joe Bergin | 9 | Son | — | Massachusetts |
| 40 | Thomas Colgan | 65 | Head | Director Of Heights & Measures | Massachusetts |
Pedigree Summary
John + 5 siblings
Gen 1 · 3 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)