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John Mcdermott — 1940 US Census Record
Model Tree available1940 United States Federal Census · Waseca-County, Minnesota
Our Model Tree links this John Mcdermott across the 1920, 1930 and 1940 US Censuses in Waseca-County, Minnesota (XGBoost, ~Confirmed), with identified parents John & Margaret — first a head (b.~1916), then head of a 3-person household.
Age 24
b. ~1916
Male
Head
Born: Minnesota
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Waseca-County, Minnesota |
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Waseca City |
| 1935 Residence (County) | Waseca |
| Additional Details | |
| Occupation | Sheet Metal Worker |
| Industry | Plumbing + Heating |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1748 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Sheet Metal Worker |
| Township / Ward | Waseca City |
| Est. Birth Year | ~1916 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| John Mcdermott | Head | — | 24 | ~1916 |
| Michael Mcdermott | Son | — | ~1940 | |
| Doris Mcdermott | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Waseca, Minnesota
Son, age 4
Waseca, Minnesota · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | John N |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Waseca, Minnesota
Son, age 14
Waseca, Minnesota · implied b. ~1916 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | John M. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Waseca-County, Minnesota
Head, age 24
Waseca-County, Minnesota · implied b. ~1916 — 3 household members
| Surname | McDermott |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Minnesota |
| 1935 Residence (City) | Waseca City |
| 1935 Residence (County) | Waseca |
| Occupation | Sheet Metal Worker |
| Industry | Plumbing + Heating |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1748 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Mcdermott (~0.92 confidence) and mother Margaret Mcdermott (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Mcdermott
b. ~1892
Source father
● Household
· direct · ~0.92
Mother
Margaret Mcdermott
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcdermott
Head · 1940 · age 24 · b. ~1916 · Minnesota
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Waseca-County, Minnesota
Open full size
1940 US Federal Census — Waseca-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01966-00695)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Meris Louise Schied | 3 | Daughter | — | Minnesota |
| 42 | Margaret Ann Schied | 0 | Daughter | — | Minnesota |
| 43 | Bernard Gallagher | 50 | Head | Medical Doctor | Minnesota |
| 44 | Margaret Gallagher | 46 | Wife | — | Minnesota |
| 45 | Marjorie Gallagher | 17 | Daughter | — | Minnesota |
| 46 | William Gallagher | 15 | Son | — | Minnesota |
| 47 | Marion Gallagher | 13 | Daughter | — | Minnesota |
| 48 | Lawrence Gallagher | 11 | Son | — | Minnesota |
| 49 | Virginia Gallagher | 7 | Daughter | — | Minnesota |
| 50 | Albert Wolter | 24 | Head | — | Wisconsin |
| 51 | Clara Wolter | 20 | Wife | — | Minnesota |
| 52 | Mary Larson | 14 | Lodger | — | Minnesota |
| 53 | Thomas Moran | 71 | Head | — | Minnesota |
| 54 | Catherine Moran | 68 | Wife | — | Wisconsin |
| 55 | John Mcdermott THIS PERSON | 24 | Head | Sheet Metal Worker | Minnesota |
| 56 | Doris Mcdermott | 24 | Wife | — | Minnesota |
| 57 | Michael Mcdermott | 0 | Son | — | Minnesota |
| 58 | Julius Heim | 31 | Head | Chef | South Dakota |
| 59 | Alice Heim | 31 | Wife | — | North Dakota |
| 60 | Kenneth Heim | 1 | Son | — | South Dakota |
| 61 | X Cancelled | None | X | X | X |
| 62 | Alice Bristow | 77 | Head | — | Illinois |
| 63 | Grace Anderson | 67 | Sister | — | Minnesota |
| 64 | Chauncey Brush | 54 | Head | Locomotive Engineer | Minnesota |
| 65 | Ethel Welch | 54 | Housekeeper | Housekeeper | Minnesota |
| 66 | Nancy Hostager | 79 | Lodger | — | Minnesota |
| 67 | William Pratke | 70 | Head | Salesman | Minnesota |
| 68 | Iona Pratke | 70 | Wife | — | Minnesota |
| 69 | Caroline Pratke | 22 | Niece | Teacher | Minnesota |
| 70 | Mae Pratke | 22 | Niece | Nurse Training | Minnesota |
| 71 | Alvin Koechel | 51 | Head | Proprietor | South Dakota |
| 72 | Minnie Koechel | 49 | Wife | — | Minnesota |
| 73 | Russell Koechel | 17 | Son | Laborer | Minnesota |
| 74 | Albert Severn | 41 | Head | Salesman | Iowa |
| 75 | Myrtle Severn | 41 | Wife | — | Iowa |
| 76 | Albert Severn | 19 | Son | Fly Tying | Minnesota |
| 77 | Ronald Severn | 18 | Son | Laborer | Minnesota |
| 78 | William Severn | 14 | Son | — | Minnesota |
| 79 | Erwin Ewest | 30 | Head | Feeder | Minnesota |
| 80 | Harriet Ewest | 25 | Wife | — | Minnesota |
Pedigree Summary
John
Gen 1 · 2 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)