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John Mckay — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Essex-County, Massachusetts
Our Model Tree links this John Mckay across the 1930 and 1940 US Censuses in Essex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1892), then head of a 6-person household.
Age 48
b. ~1892
Male
Head
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Essex-County, Massachusetts |
| Surname | McKay |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Salem |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Fireman |
| Industry | Leather factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
| Occupation | Fireman |
| Township / Ward | Salem |
| Est. Birth Year | ~1892 |
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 |
|---|---|---|---|---|
| John Mckay | Son | — | 20 | ~1920 |
| Mary Mckay | Daughter | — | 21 | ~1919 |
| Eleanor Mckay | Daughter | — | 14 | ~1926 |
| Ellen Mckay | Spouse | — | 47 | ~1893 |
| John Mckay | Head | — | 48 | ~1892 |
| Joseph Mckay | Son | — | 18 | ~1922 |
Census Appearances
1930
Essex, Massachusetts
Head, age 38
Essex, Massachusetts · implied b. ~1892 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McKay |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Naturalized |
| Year of Immigration | 1911 |
| Age at First Marriage | 25 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Occupation | Staker |
| Industry | Leather Factory |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 3600 |
| Radio Set | R |
| Veteran | No |
| Birthplace (normalized) | irish free state |
1940
Essex-County, Massachusetts
Head, age 48
Essex-County, Massachusetts · implied b. ~1892 — 6 household members
| Surname | McKay |
| Given Name | John F. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | Salem |
| 1935 Residence (County) | Essex |
| Naturalization Status | Naturalized |
| Occupation | Fireman |
| Industry | Leather factory |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1500 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birthplace (normalized) | irish free state |
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 Mckay across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Mckay
Head · 1940 · age 48 · b. ~1892 · 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 — Essex-County, Massachusetts
Open full size
1940 US Federal Census — Essex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01589-00584)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | James Hurdley | 69 | Head | Retired | Ireland |
| 42 | Elizabeth Hurdley | 62 | Wife | — | Irish Free State |
| 43 | Leslie Hurdley | 28 | Son | Truck Driver | Massachusetts |
| 44 | Jeremiah J. Cronin | 30 | Head | Janitor | Massachusetts |
| 45 | Mary Cronin | 31 | Wife | — | Massachusetts |
| 46 | James Cronin | 6 | Son | — | Massachusetts |
| 47 | Geraldine Cronin | 5 | Daughter | — | Massachusetts |
| 48 | John F. Mckay THIS PERSON | 48 | Head | Fireman | Irish Free State |
| 49 | Ellen T. Mckay | 47 | Wife | — | Irish Free State |
| 50 | Mary M. Mckay | 21 | Daughter | — | Massachusetts |
| 51 | John F. Jr. Mckay | 20 | Son | — | Massachusetts |
| 52 | Joseph P. Mckay | 18 | Son | — | Massachusetts |
| 53 | Eleanor Mckay | 14 | Daughter | — | Massachusetts |
| 54 | Mary Powers | 53 | Head | — | Massachusetts |
| 55 | John Powers | 25 | Son | Police Officer | Massachusetts |
| 56 | Frances Burton | 47 | Sister | Stitcher | Massachusetts |
| 57 | Thomas Lane | 74 | Head | Retired | Irish Free State |
| 58 | Mary Lane | 72 | Wife | — | Massachusetts |
| 59 | William Lane | 34 | Son | — | Massachusetts |
| 60 | Franklin Lane | 31 | Son | — | Massachusetts |
| 61 | Robert Lane | 30 | Son | Painter | Massachusetts |
| 62 | Elizabeth Lane | 28 | Daughter | Saleswoman | Massachusetts |
| 63 | Katherine B. Danaher | 44 | Head | Mangle | Massachusetts |
| 64 | Mary A. Danaher | 20 | Daughter | Clerk | Massachusetts |
| 65 | John J. Danaher | 18 | Son | — | Massachusetts |
| 66 | Patrick Woods | 55 | Head | Engineer | Irish Free State |
| 67 | Frances E. Woods | 51 | Wife | — | Irish Free State |
| 68 | William Cullen | 52 | Head | — | Massachusetts |
| 69 | Christina Cullen | 52 | Wife | — | Massachusetts |
| 70 | John Cullen | 25 | Son | Bus Driver | Massachusetts |
| 71 | Raymond Cullen | 20 | Son | Floorboy | Massachusetts |
| 72 | Patrick J. Sherry | 53 | Head | Leather Worker | Irish Free State |
| 73 | Annie M. Sherry | 51 | Wife | — | Irish Free State |
| 74 | Patrick J. Sherry | 21 | Son | Clerical | Massachusetts |
| 75 | Thomas V. Sherry | 17 | Son | — | Massachusetts |
| 76 | Christopher E. Sherry | 11 | Son | — | Massachusetts |
| 77 | Mary E. Sherry | 10 | Daughter | — | Massachusetts |
| 78 | James J. Delavant | 39 | Head | Belt Maker | Massachusetts |
| 79 | Bertha F. Delavant | 38 | Wife | — | Massachusetts |
| 80 | Irene Delavant | 18 | 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)