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John Mcdonald — 1940 US Census Record
Model Tree available1940 United States Federal Census · King-County, Washington
Our Model Tree links this John Mcdonald across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed), with identified parents Frank & Frank — first a son (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Male
Son
Born: Oregon
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | McDonald |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Auto Repair Shop |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 350 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
| Occupation | Mechanic |
| Township / Ward | Seattle 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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Fay Mcdonald | Daughter | — | 15 | ~1925 |
| Josephine Mcdonald | Daughter | — | 13 | ~1927 |
| Martha Mcdonald | Head | — | 51 | ~1889 |
| John Mcdonald | Son | — | 24 | ~1916 |
| William Mcdonald | Son | — | 17 | ~1923 |
Census Appearances
1920
King, Washington
Son, age 4
King, Washington · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Macdonald |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | California |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
Son, age 14
King, Washington · implied b. ~1916 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Macdonald |
| Given Name | John A |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Oregon |
| Father's Birthplace | Canada-English |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
1940
King-County, Washington
Son, age 24
King-County, Washington · implied b. ~1916 — 5 household members
| Surname | McDonald |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Single |
| Birthplace | Oregon |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Occupation | Mechanic |
| Industry | Auto Repair Shop |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 350 |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Oregon |
| Birth Country | United States |
| Birthplace (normalized) | oregon |
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 Mcdonald across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Frank Macdonald (~0.92 confidence) and father Frank Macdonald (~0.92 confidence) and mother Louise Macdonald (~0.92 confidence) and mother Margaret Macdonald (~0.92 confidence) and mother Martha Mcdonald (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Frank Macdonald
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Frank Macdonald
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Louise Macdonald
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Margaret Macdonald
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Martha Mcdonald
b. ~1889
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Mcdonald
Son · 1940 · age 24 · b. ~1916 · Washington
★ You are viewing this record
Sibling
William Mcdonald
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Fay Mcdonald
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Josephine Mcdonald
Sibling · 1940 · age 13
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 — King-County, Washington
Open full size
1940 US Federal Census — King-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04382-00557)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Betty Hericoll | 12 | daughter | — | Washington |
| 42 | Patrick Hericoll | 2 | son | — | Washington |
| 43 | Martha O. Mcdonald | 51 | Head | — | California |
| 44 | John Mcdonald THIS PERSON | 24 | son | Mechanic | Oregon |
| 45 | William Mcdonald | 17 | son | — | Washington |
| 46 | Fay Mcdonald | 15 | daughter | — | Washington |
| 47 | Josephine Mcdonald | 13 | daughter | — | Washington |
| 48 | Arthur O. Johnston | 45 | Head | Logger | New Hampshire |
| 49 | Ann F. Johnston | 42 | wife | — | Ireland |
| 50 | Clarence Eckert | 31 | Head | Auto Mechanic | Washington |
| 51 | Nellie O. Eckert | 32 | wife | — | Washington |
| 52 | Arthur Eckert | 8 | son | — | Washington |
| 53 | Delores Eckert | 4 | daughter | — | Washington |
| 54 | Clyde S. O. Mathews | 58 | Head | General Mechanic | Michigan |
| 55 | Ethel M. Moore | 31 | Head | — | Washington |
| 56 | Lawrence A. Moore | 4 | son | — | Washington |
| 57 | William H. O. Knierim | 73 | Head | — | Missouri |
| 58 | Minnie Knierim | 75 | wife | — | Missouri |
| 59 | Lawrence A. Mccarthy | 44 | Head | Roof Repairman | Iowa |
| 60 | Bessie Mccarthy | 43 | wife | — | Missouri |
| 61 | Claude M. O. Churchill | 66 | Head | Tin Smith | Illinois |
| 62 | Lyle Churchill | 47 | cousin | — | Minnesota |
| 63 | Allen De Lisle | 26 | Head | Waiter | Kentucky |
| 64 | June O. De Lisle | 23 | wife | — | Washington |
| 65 | Jerry Lee De Lisle | 1 | son | — | Washington |
| 66 | Infant De Lisle | 0 | son | — | Washington |
| 67 | James Earl Sr. Gibson | 53 | father-in-law | Certified Public Accountant | Minnesota |
| 68 | Fred H. Powell | 57 | Head | Oiler | Michigan |
| 69 | Irene H. Powell | 50 | wife | — | Alaska |
| 70 | Ruell B. Powell | 21 | son | Fireman | Washington |
| 71 | Wayne H. Bartholomew | 44 | Head | Ticket Clerk | Washington |
| 72 | Gladys F. Bartholomew | 41 | wife | Secretary | Illinois |
| 73 | Ronald W. Bartholomew | 13 | son | — | Washington |
| 74 | Estelle F. O. Bartholomew | 69 | Mother | — | Philadelphia |
| 75 | Raymond O. Hale | 42 | Head | Ship Cleaner | England |
| 76 | Grace Hale | 41 | wife | — | Minnesota |
| 77 | Florence Hale | 14 | daughter | — | Washington |
| 78 | Dolores Hale | 7 | daughter | — | Washington |
| 79 | Leonard Hamilton | 36 | Head | Common Laborer | Nebraska |
| 80 | Hamilton | None | wife | — | — |
Related Census Records
Pedigree Summary
John + 3 siblings
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)