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James Mcdermott — 1940 US Census Record
Model Tree available1940 United States Federal Census · Butler-County, Ohio
Our Model Tree links this James Mcdermott across the 1920, 1930 and 1940 US Censuses in Butler-County, Ohio (XGBoost, ~Confirmed), with identified parents Joseph & Thomas — first a son (b.~1911), then head of a 4-person household.
Age 29
b. ~1911
Male
Son
Born: Ohio
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Butler-County, Ohio |
| Surname | McDermott |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | City of Middletown |
| 1935 Residence (County) | Butler |
| Additional Details | |
| Occupation | Bookkeeper |
| Industry | Meat Market |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1400 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
| Occupation | Bookkeeper |
| Township / Ward | City Of Middletown |
| Est. Birth Year | ~1911 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Joseph Mcdermott | Head | — | 62 | ~1878 |
| James Mcdermott | Son | — | 29 | ~1911 |
| Joseph Mcdermott | Son | — | 24 | ~1916 |
| Ella Mcdermott | Spouse | — | 60 | ~1880 |
Census Appearances
1920
Butler, Ohio
Son, age 9
Butler, Ohio · implied b. ~1911 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | James P. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1930
Butler, Ohio
Son, age 19
Butler, Ohio · implied b. ~1911 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McDermott |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Ohio |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Ohio |
| Occupation | Realtor |
| Industry | Real estate office |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
1940
Butler-County, Ohio
Son, age 29
Butler-County, Ohio · implied b. ~1911 — 4 household members
| Surname | McDermott |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Ohio |
| 1935 Residence (City) | City of Middletown |
| 1935 Residence (County) | Butler |
| Occupation | Bookkeeper |
| Industry | Meat Market |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1400 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Ohio |
| Birth Country | United States |
| Birthplace (normalized) | ohio |
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 James Mcdermott across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Joseph Mcdermott (~0.92 confidence) and father Thomas Mcdermott (~0.92 confidence) and mother Ella Mcdermott (~0.92 confidence) and mother Ellen Mcdermott (~0.92 confidence) and father Thomas Mcdermott (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Joseph Mcdermott
b. ~1878
Source father
● Household
· direct · ~0.92
Father
Thomas Mcdermott
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Ella Mcdermott
b. ~1880
Source mother
● Household
· direct · ~0.92
Mother
Ellen Mcdermott
b. ~1881
Source mother
● Household
· direct · ~0.92
Father
Thomas Mcdermott
b. ~1898
Source father
● Household
· direct · ~0.92
This person
Anchor record
James Mcdermott
Son · 1940 · age 29 · b. ~1911 · Ohio
★ You are viewing this record
Sibling
Joseph Mcdermott
Sibling · 1940 · age 24
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 — Butler-County, Ohio
Open full size
1940 US Federal Census — Butler-County, Ohio
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-03035-00245)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph Mcdermott | 62 | Head | Public Accountant | Ohio |
| 2 | Ella Mcdermott | 60 | Wife | — | Ohio |
| 3 | James Mcdermott THIS PERSON | 29 | Son | Bookkeeper | Ohio |
| 4 | Joseph Jr. Mcdermott | 24 | Son | — | Ohio |
| 5 | Frank Paine | 47 | Head | Manager | Italy |
| 6 | Catherine Paine | 36 | Wife | — | Ohio |
| 7 | Joseph Paine | 12 | Son | — | Ohio |
| 8 | Charles Paine | 9 | Son | — | Ohio |
| 9 | William Paine | 8 | Son | — | Ohio |
| 10 | John Paine | 6 | Son | — | Ohio |
| 11 | Mary F. Paine | 5 | Daughter | — | Ohio |
| 12 | Carolyn Paine | 3 | Daughter | — | Ohio |
| 13 | Jeanette Paine | 1 | Daughter | — | Ohio |
| 14 | Clarence Wallick | 51 | Head | Supervisor | Ohio |
| 15 | Helen Wallick | 45 | Wife | — | Indiana |
| 16 | Jeanne Wallick | 20 | Daughter | — | Ohio |
| 17 | William Johnston | 43 | Head | Cold Strip Supervisor | Kentucky |
| 18 | Nellie Johnston | 38 | Wife | — | Ohio |
| 19 | Janet Johnston | 6 | Daughter | — | Kentucky |
| 20 | Anna Collier | 42 | Servant | House Work | Kentucky |
| 21 | Jacob F. Leibold | 60 | Head | Accountant | Ohio |
| 22 | Martha A. Leibold | 57 | Wife | — | Ohio |
| 23 | Jacob F. Jr. Leibold | 18 | Son | — | Ohio |
| 24 | Adelaide Compton | 85 | Mother in law | — | Ohio |
| 25 | Stanley Foulke | 22 | Lodger | Record Clerk | Iowa |
| 26 | Donald Montville | 43 | Head | Sales Engineer | Massachusetts |
| 27 | Brittie Montville | 43 | Wife | — | Kentucky |
| 28 | Arthur R. Burk | 41 | Head | Roofing Machine Operator | Indiana |
| 29 | Emily Burk | 40 | Wife | Clerk | Indiana |
| 30 | Frederick Jordan | 24 | Head | Sales Clerk | Ohio |
| 31 | Betty Jordan | 20 | Wife | — | Michigan |
| 32 | Dewitt Yost | 24 | Head | Chemical Engineer | Alabama |
| 33 | Ann Yost | 20 | Wife | — | Alabama |
| 34 | Grover Yost | 55 | Head | Office Clerk | Ohio |
| 35 | Fannie Yost | 55 | Wife | — | Ohio |
| 36 | Harry Yost | 44 | Head | Roll Foreman | Ohio |
| 37 | Fern Yost | 42 | Wife | — | Ohio |
| 38 | Mary A. Yost | 20 | Daughter | — | Ohio |
| 39 | Lee Ortman | 53 | Head | Manager | Ohio |
Pedigree Summary
James + 1 sibling
Gen 1 · 5 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)