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Mary Macdonald — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Yellowstone-County, Montana
Our Model Tree links this Mary Macdonald across the 1930 and 1940 US Censuses in Yellowstone-County, Montana (XGBoost, ~Confirmed) — first a daughter (b.~1928), then head of a 6-person household.
Age 12
b. ~1928
Female
Daughter
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Yellowstone-County, Montana |
| Surname | MacDonald |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Great Falls |
| 1935 Residence (County) | Cascade |
| Additional Details | |
| Highest Grade | No 5 |
| 1935 Residence | Montana |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | Billings |
| Est. Birth Year | ~1928 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Macdonald | Spouse | — | 41 | ~1899 |
| Joseph Macdonald | Son | — | 15 | ~1925 |
| Jerry Macdonald | Son | — | 16 | ~1924 |
| Wilson Macdonald | Head | — | 43 | ~1897 |
| John Macdonald | Son | — | 6 | ~1934 |
| Mary Macdonald | Daughter | — | 12 | ~1928 |
Census Appearances
1930
Yellowstone, Montana
Daughter, age 2
Yellowstone, Montana · implied b. ~1928 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacDonald |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Michigan |
| Mother's Birthplace | Nebraska |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Yellowstone-County, Montana
Daughter, age 12
Yellowstone-County, Montana · implied b. ~1928 — 6 household members
| Surname | MacDonald |
| Given Name | Mary Ellen |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Great Falls |
| 1935 Residence (County) | Cascade |
| Highest Grade | No 5 |
| 1935 Residence | Montana |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
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 Macdonald across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Macdonald
Daughter · 1940 · age 12 · b. ~1928 · Montana
★ You are viewing this record
Sibling
Joseph Macdonald
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Macdonald
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jerry Macdonald
Sibling · 1940 · age 16
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 — Yellowstone-County, Montana
Open full size
1940 US Federal Census — Yellowstone-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02234-00427)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Edna J Cale | 37 | Maid | Housework | Indiana |
| 42 | John Farrow | 31 | Head | Clerking | Italy |
| 43 | Georgina V Farrow | 25 | Wife | — | Wyoming |
| 44 | John Farrow | 6 | Son | — | Montana |
| 45 | Joseph Farrow | 21 | Brother | Apprentice Plumber | Montana |
| 46 | Benjamin Ecklee | 56 | Father in law | Maintenance Work | Wyoming |
| 47 | John Ecklee | 24 | Son in law | — | Wyoming |
| 48 | Lloyd Green | 51 | Head | Salesman | Michigan |
| 49 | Nola Green | 52 | Wife | — | Nebraska |
| 50 | Jennie Hebb | 72 | Head | — | Illinois |
| 51 | Elmer J Allen | 50 | Head | Baggage Agent | Colorado |
| 52 | Madge F Allen | 50 | Wife | — | Iowa |
| 53 | Everett Allen | 29 | Son | Clerking | Montana |
| 54 | Ella M Mccord | 51 | Head | — | Minnesota |
| 55 | William Mccord | 31 | Son | Meter Reader | Iowa |
| 56 | John H Mccord | 26 | Son | Attendant | Iowa |
| 57 | Eva Mccord | 21 | Daughter in law | — | Montana |
| 58 | Dennis R Mccord | 1 | Grandson | — | Montana |
| 59 | Thomas Armitage | 70 | Head | Salesman | Michigan |
| 60 | Julia Armitage | 68 | Wife | — | Michigan |
| 61 | Sidney C Armitage | 50 | Son | Driller | Montana |
| 62 | Kenneth Armitage | 44 | Son | Salesman | Montana |
| 63 | Vida Armitage | 37 | Daughter in law | — | Missouri |
| 64 | Melinda Freeman | 48 | Head | Manager | Minnesota |
| 65 | Wilson Macdonald | 43 | Head | Manager | Michigan |
| 66 | Mary Macdonald | 41 | Wife | — | Nebraska |
| 67 | Jerry Macdonald | 16 | Son | Carrier | Montana |
| 68 | Joseph Macdonald | 15 | Son | — | Montana |
| 69 | Mary Ellen Macdonald THIS PERSON | 12 | Daughter | — | Montana |
| 70 | John Macdonald | 6 | Son | — | Montana |
| 71 | S Garfield Fontin | 57 | Head | Bookkeeper | England |
| 72 | Mary Fontin | 54 | Wife | — | Nevada |
| 73 | Arthur Frenery | 58 | Head | President Manager | Wales |
| 74 | Ethel M Frenery | 56 | Wife | — | Montana |
| 75 | Abraham Miller | 67 | Head | Salesman | Kansas |
| 76 | Clara E Miller | 57 | Wife | — | Illinois |
| 77 | Christopher Rusch | 59 | Head | Deputy Sheriff | Minnesota |
| 78 | Bridget Rusch | 52 | Wife | — | Michigan |
| 79 | Inza Jones | 48 | Lodger | Tailoring | Sweden |
| 80 | William B Carl | 45 | Head | Shop Foreman | Missouri |
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)