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John Mcdermott — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Sullivan-County, New York
Our Model Tree links this John Mcdermott across the 1930 and 1940 US Censuses in Sullivan-County, New York (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 10-person household.
Age 25
b. ~1915
Male
Son
Born: South Dakota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sullivan-County, New York |
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Kauneonga Lake |
| 1935 Residence (County) | Sullivan |
| Additional Details | |
| Occupation | Laborer |
| Industry | Road Construction |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 400 |
| Highest Grade | H 6 |
| 1935 Residence | Same Place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
| Occupation | Laborer |
| Township / Ward | Kauneonga Lake |
| 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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Margaret Mcdermott | Daughter | — | 11 | ~1929 |
| Agnes Mcdermott | Daughter | — | 19 | ~1921 |
| Patrick Mcdermott | Head | — | 57 | ~1883 |
| Bernard Mcdermott | Son | — | 27 | ~1913 |
| Thomas Mcdermott | Son | — | 15 | ~1925 |
| John Mcdermott | Son | — | 25 | ~1915 |
| Jerry Mcdermott | Son | — | 23 | ~1917 |
| George Mcdermott | Son | — | 8 | ~1932 |
| Matthew Mcdermott | Son | — | 17 | ~1923 |
| Mary Mcdermott | Spouse | — | 51 | ~1889 |
Census Appearances
1930
Sullivan, New …
Son, age 16
Sullivan, New York · implied b. ~1914 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | South Dakota |
| Father's Birthplace | Northern Ireland |
| Mother's Birthplace | New York |
| Can Read/Write | Yes |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
1940
Sullivan-County, New …
Son, age 25
Sullivan-County, New York · implied b. ~1915 — 10 household members
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | South Dakota |
| 1935 Residence (City) | Kauneonga Lake |
| 1935 Residence (County) | Sullivan |
| Occupation | Laborer |
| Industry | Road Construction |
| Class of Worker | PW |
| Hours Worked | 21 |
| Income (1939) | 400 |
| Highest Grade | H 6 |
| 1935 Residence | Same Place |
| Birth State | South Dakota |
| Birth Country | United States |
| Birthplace (normalized) | south dakota |
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 Mcdermott across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Mcdermott
Son · 1940 · age 25 · b. ~1915 · New York
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Sibling
Thomas Mcdermott
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Mcdermott
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Agnes Mcdermott
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerry Mcdermott
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matthew Mcdermott
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Mcdermott
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Bernard Mcdermott
Sibling · 1940 · age 27
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 — Sullivan-County, New York
Open full size
1940 US Federal Census — Sullivan-County, New York
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02790-00024)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frederick B. Sagar | 62 | Head | Farmer | New York |
| 2 | Sadie Sagar | 47 | Wife | — | New York |
| 3 | Frederika Sagar | 23 | Daughter | New Worker | New York |
| 4 | Herman J. B. Carey | 64 | Head | Farmer | New Jersey |
| 5 | Margaret E. Carey | 67 | Sister | — | New Jersey |
| 6 | John E. Ray | 25 | Hired Hand | Farmer | New York |
| 7 | Patrick Mcdermott | 57 | Head | Farmer | Irish Free State |
| 8 | Mary A. Mcdermott | 51 | Wife | — | New York |
| 9 | Bernard Mcdermott | 27 | Son | Laborer | Illinois |
| 10 | John Mcdermott THIS PERSON | 25 | Son | Laborer | South Dakota |
| 11 | Jerry Mcdermott | 23 | Son | Truck Driver | South Dakota |
| 12 | Agnes Mcdermott | 19 | Daughter | House Work | South Dakota |
| 13 | Matthew Mcdermott | 17 | Son | New Worker | South Dakota |
| 14 | Thomas Mcdermott | 15 | Son | — | New York |
| 15 | Margaret Mcdermott | 11 | Daughter | — | New York |
| 16 | George Mcdermott | 8 | Son | — | New York |
| 17 | Harry Schultz | 53 | Head | Proprietor | Russia |
| 18 | Sarah Schultz | 46 | Wife | — | Russia |
| 19 | Eugene Schultz | 17 | Son | Delivery Boy | New York |
| 20 | John Driscoll | 33 | Head | Carpenter | New York |
| 21 | Anna Driscoll | 32 | Wife | — | New Jersey |
| 22 | John Jr. Driscoll | 2 | Son | — | New York |
| 23 | Patricia A. Driscoll | 0 | Daughter | — | New York |
| 24 | Thomas Rinker | 52 | Hired Hand | Farm Hand | New York |
| 25 | Timothy Driscoll | 73 | Head | Farmer | New York |
| 26 | Harold Stoddard | 34 | Son-in-law | Travelling Salesman | New York |
| 27 | Anne Stoddard | 34 | Daughter | — | New York |
| 28 | Edward Grant Stoddard | 2 | Son | — | New York |
| 29 | Lena Hogencamp | 73 | Head | — | New York |
| 30 | John H. Martens | 49 | Head | — | New Jersey |
| 31 | Loretta Martens | 53 | Wife | — | New York |
| 32 | Thomas Steen | 80 | Head | — | New York |
| 33 | Estelle Steen | 66 | Wife | — | New York |
| 34 | Joan Steen | 14 | Granddaughter | — | New York |
| 35 | Gloria Steen | 11 | Granddaughter | — | New York |
| 36 | John C. Stewart | 68 | Head | Carpenter | New York |
| 37 | Margaret Stewart | 58 | Wife | — | New Jersey |
| 38 | Ellen Stewart | 24 | Daughter | Teacher | New York |
| 39 | Robert R. Rhyme | 67 | Head | Superintendent | New York |
| 40 | Eva H. Rhyme | 52 | Wife | — | New York |
Related Census Records
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)