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Mary Mcmillan — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Prairie, Montana
Our Model Tree links this Mary Mcmillan across the 1920, 1930 and 1940 US Censuses in Prairie, Montana (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 12-person household.
Age 52
b. ~1878
Female
Head
Born: Scotland
Widowed
1930 Census Record Details
| Census Year | 1930 |
| Location | Prairie, Montana |
| Surname | McMillan |
| Given Name | Mary H. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1900 |
| Age at First Marriage | 22 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Additional Details | |
| Occupation | Proprietor |
| Industry | Restaurant |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
| Occupation | Proprietor |
| Township / Ward | Terry Town |
| Est. Birth Year | ~1878 |
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.
12 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Rhoda Mcmillan | Daughter | — | 16 | ~1914 |
| Mrs Lambert | Other | — | 34 | ~1896 |
| Emma Blair | Other | — | 28 | ~1902 |
| Anna Grover | Other | — | 49 | ~1881 |
| William Rodgers | Other | — | 83 | ~1847 |
| Wilma Short | Other | — | 24 | ~1906 |
| Mary Mcmillan | Head | — | 52 | ~1878 |
| Donald Mcmillan | Son | — | 26 | ~1904 |
| G Lambert | Other | — | 63 | ~1867 |
| Catherine Bialac | Other | — | 51 | ~1879 |
| Ellen Mcclure | Other | — | 57 | ~1873 |
| Alice Nelson | Other | — | 36 | ~1894 |
Census Appearances
1920
Prairie, Montana
Head, age 40
Prairie, Montana · implied b. ~1880 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMillan |
| Given Name | Mary H |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | Scotland |
| Year of Immigration | 1900 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Proprietor |
| Industry | Hotel |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Scotch |
| Home Owned/Rented | R |
| Birth Country | Scotland |
| Year of Naturalization | 1914 |
| Birthplace (normalized) | scotland |
1930
Prairie, Montana
Head, age 52
Prairie, Montana · implied b. ~1878 — 12 household members
| Surname | McMillan |
| Given Name | Mary H. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Widowed |
| Birthplace | Scotland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1900 |
| Age at First Marriage | 22 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | Proprietor |
| Industry | Restaurant |
| Class of Worker | OA |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | R |
| Home Value / Rent | 30 |
| Radio Set | R |
| Veteran | No |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
1940
Prairie-County, Montana
Other, age 66
Prairie-County, Montana · implied b. ~1874 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McMillan |
| Given Name | Mary H. |
| Relationship to Head | Lodger |
| Sex | F |
| Color / Race | White |
| Age | 66 |
| Marital Status | Single |
| Birthplace | Scotland |
| 1935 Residence (City) | Miles City |
| 1935 Residence (County) | Custer |
| Naturalization Status | Naturalized |
| Highest Grade | No 7 |
| 1935 Residence | Montana |
| Birth Country | Scotland |
| Birthplace (normalized) | scotland |
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 Mcmillan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Mcmillan
Head · 1930 · age 52 · b. ~1878 · Montana
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Prairie, Montana
Open full size
1930 US Federal Census — Prairie, Montana
Page Contents
50 people indexed on this census page (ia:1930:15thcensus1260unit:0889)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Dorothy M. Hulbert | 7 | Daughter | — | Montana |
| 2 | Stanley Guy | 55 | Head | Undertaker | England |
| 3 | Stella M. Guy | 34 | Wife | — | N. Dakota |
| 4 | Frederick L. Morrow | 43 | Head | Plumber | New York |
| 5 | Florence E. Morrow | 46 | Wife | — | Iowa |
| 6 | Frederick Hicks | 50 | Head | Laborer | Canada English |
| 7 | Cornelia Hith | 72 | Head | — | Wisconsin |
| 8 | Beryl A. Hith | 37 | Daughter | — | Montana |
| 9 | Wm. D. Mansfield | 64 | Head | Janitor | Connecticut |
| 10 | William W. Clark | 17 | Boarder | Laborer | Montana |
| 11 | Blaine Wood | 34 | Head | Laborer | N. Carolina |
| 12 | Ray L. Kampf | 54 | Head | Manager | Illinois |
| 13 | Lulu J. Kampf | 55 | Wife | — | Illinois |
| 14 | Nicholas G. Spacas | 43 | Head | Manager | Greece |
| 15 | Wayne L. Sweet | 23 | Guest | Laborer | N. Dakota |
| 16 | Lloyd L. Glasgow | 19 | Guest | Laborer | Montana |
| 17 | Carl H. Knapp | 26 | Lodger | Laborer | Indiana |
| 18 | Mustafa Khan | 48 | Head | Proprietor | Afghanistan |
| 19 | Louise Khan | 44 | Wife | — | Finland |
| 20 | William Larson | 52 | Lodger | Waiter | Iowa |
| 21 | Charles Bingham | 73 | Lodger | Dishwasher | Iowa |
| 22 | Charles E. Loss | 66 | Head | City Marshal | Pennsylvania |
| 23 | Helen Frazier | 27 | Head | Proprietor | Montana |
| 24 | Elizabeth Cunning | 40 | Lodger | Cook | Kentucky |
| 25 | Frank D. Conner | 22 | Head | Mechanic | Minnesota |
| 26 | William H. Conner | 29 | Lodger | Mechanic | S. Dakota |
| 27 | John H. Lindenmeyer | 49 | Head | Serviceman | Illinois |
| 28 | Carrie B. Lindenmeyer | 46 | Wife | Housekeeper | Illinois |
| 29 | Florence A. Lindenmeyer | 19 | Daughter | — | Montana |
| 30 | Howard H. Lindenmeyer | 15 | Son | — | Montana |
| 31 | Robert L. Lindenmeyer | 12 | Son | — | Montana |
| 32 | Birney E. Templin | 59 | Head | Proprietor | Colorado |
| 33 | James B. Templin | 20 | Son | Laborer | Montana |
| 34 | Gerald Templin | 17 | Son | — | Montana |
| 35 | John Templin | 14 | Son | — | Montana |
| 36 | Birney E. Templin | 11 | Son | — | Montana |
| 37 | Mary H. Mcmillan THIS PERSON | 52 | Head | Proprietor | Scotland |
| 38 | Donald J. Mcmillan | 26 | Son | Cook | Montana |
| 39 | Rhoda M. Mcmillan | 16 | Daughter | — | Montana |
| 40 | Alice M. Nelson | 36 | Servant | Waitress | Nebraska |
| 41 | Wilma A. Short | 24 | Servant | Waitress | N. Dakota |
| 42 | William Rodgers | 83 | Father | — | Scotland |
| 43 | Ellen Mcclure | 57 | Hotel Guest | — | Indiana |
| 44 | Anna Grover | 49 | Hotel Guest | — | N. Dakota |
| 45 | Emma Blair | 28 | Servant | Chambermaid | N. Dakota |
| 46 | Catherine Bialac | 51 | Servant | Chambermaid | Illinois |
| 47 | G. Lambert | 63 | Hotel Guest | Cattle Buyer | Wisconsin |
| 48 | Mrs. G. Lambert | 34 | Hotel Guest | — | N. Dakota |
| 49 | Edward Spass | 21 | Head | — | Canada English |
| 50 | Ann E. Gale | 70 | Hotel Guest | Travelling Collector | Minnesota |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)