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Mary Mcdermott — 1940 US Census Record
Model Tree available1940 United States Federal Census · Shawnee-County, Kansas
Our Model Tree links this Mary Mcdermott across the 1920, 1930 and 1940 US Censuses in Shawnee-County, Kansas (XGBoost, ~Confirmed), with identified parents George & Catherine — first a daughter (b.~1918), then head of a 4-person household.
Age 22
b. ~1918
Female
Daughter
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Shawnee-County, Kansas |
| Surname | McDermott |
| Given Name | Mary Katharine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Topeka City |
| 1935 Residence (County) | Shawnee |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Topeka City |
| Est. Birth Year | ~1918 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mcdermott | Daughter | — | 22 | ~1918 |
| Jane Mcdermott | Daughter | — | 25 | ~1915 |
| Catherine Mcdermott | Head | — | 46 | ~1894 |
| James Mcdermott | Son | — | 19 | ~1921 |
Census Appearances
1920
Shawnee, Kansas
Daughter, age 2
Shawnee, Kansas · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Mary C. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Shawnee, Kansas
Daughter, age 12
Shawnee, Kansas · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | Mary K |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Kansas |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Shawnee-County, Kansas
Daughter, age 22
Shawnee-County, Kansas · implied b. ~1918 — 4 household members
| Surname | McDermott |
| Given Name | Mary Katharine |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | Topeka City |
| 1935 Residence (County) | Shawnee |
| Class of Worker | 0 |
| Highest Grade | C 4 |
| 1935 Residence | Same place |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Mary Mcdermott across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father George Mcdermott (~0.92 confidence) and mother Catherine Mcdermott (~0.92 confidence) and mother Katharine Mcdermott (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
George Mcdermott
b. ~1887
Source father
● Household
· direct · ~0.92
Mother
Catherine Mcdermott
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Katharine Mcdermott
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Mcdermott
Daughter · 1940 · age 22 · b. ~1918 · Kansas
★ You are viewing this record
Sibling
James Mcdermott
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Mcdermott
Sibling · 1940 · age 25
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 — Shawnee-County, Kansas
Open full size
1940 US Federal Census — Shawnee-County, Kansas
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01261-00010)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edwin R Spalding | 66 | Head | Salesman | Vermont |
| 2 | Roda Lee Spalding | 63 | Wife | — | Minnesota |
| 3 | George W Duncan | 68 | Head | Engineer | Iowa |
| 4 | Margaret Duncan | 64 | Wife | — | Iowa |
| 5 | Hale Smith | 38 | Head | Lawyer | Ohio |
| 6 | Catharine Smith | 36 | Wife | — | Kansas |
| 7 | Cole Smith | 13 | Son | — | Kansas |
| 8 | Hale Jr Smith | 9 | Son | — | Kansas |
| 9 | Diane Smith | 6 | Daughter | — | Kansas |
| 10 | Helen Nelson | 18 | Lodger | Maid | Kansas |
| 11 | Catherine D Mcdermott | 46 | Head | Maid | Kansas |
| 12 | Jane Mcdermott | 25 | Daughter | Secretary | Kansas |
| 13 | Mary Katharine Mcdermott THIS PERSON | 22 | Daughter | — | Kansas |
| 14 | James L Mcdermott | 19 | Son | — | Kansas |
| 15 | J. Ernest Jones | 57 | Head | Vice President | Kansas |
| 16 | Elsie L Jones | 53 | Sister | — | Kansas |
| 17 | Frances Sherman | 50 | Head | — | Wisconsin |
| 18 | Adrian Sherman | 21 | Son | — | Illinois |
| 19 | James Sherman | 19 | Son | — | Illinois |
| 21 | William J Means | 43 | Head | Inspector | Illinois |
| 22 | Ella P Means | 43 | Wife | — | Illinois |
| 23 | Emily Pearson | 69 | Head | — | Illinois |
| 24 | Arthur C Keith | 39 | Head | Chemist | Texas |
| 25 | Nelle Keith | 41 | Wife | — | Texas |
| 26 | Carolyn Keith | 12 | Daughter | — | Kansas |
| 27 | Charles Keith | 7 | Son | — | Kansas |
| 28 | Clarence Thompson | 38 | Head | Clerk | Kansas |
| 29 | Marjorie Thompson | 37 | Wife | — | Kansas |
| 30 | Shirley Ann Thompson | 5 | Daughter | — | Kansas |
| 31 | Roy Galon Porter | 38 | Head | Engineer | Kansas |
| 32 | Elizabeth Porter | 36 | Wife | — | Kansas |
| 33 | Philip Gaylon Porter | 6 | Son | — | Kansas |
| 34 | Nancy Porter | 2 | Daughter | — | Kansas |
| 35 | Christina Schaaf | 72 | Mother-in-law | — | Russia |
| 36 | William M Oliver | 55 | Head | Salesman | Kansas |
| 37 | Ethel Oliver | 50 | Wife | — | Kansas |
| 38 | George F Illum | 58 | Head | Manager | Kansas |
| 39 | Catherine Illum | 61 | Wife | — | Kansas |
| 40 | Ruth Young | 49 | Lodger | Partner | Kansas |
Pedigree Summary
Mary + 2 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)