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Mary Mccormick — 1930 US Census Record
Model Tree available1930 United States Federal Census · Powell, Montana
Our Model Tree links this Mary Mccormick across the 1920, 1930 and 1940 US Censuses in Powell, Montana (XGBoost, ~Confirmed), with identified parents Alice & Alice — first a daughter (b.~1918), then head of a 7-person household.
Age 12
b. ~1918
Female
Daughter
Born: Montana
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Powell, Montana |
| Surname | McCormick |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Wisconsin |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Township / Ward | Deer Lodge 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.
7 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Mccormick | Daughter | — | 12 | ~1918 |
| Evelyn Mccormick | Daughter | — | 21 | ~1909 |
| Luke Mccormick | Head | — | 50 | ~1880 |
| Alice Mccormick | Other | — | 50 | ~1880 |
| Leo Mccormick | Son | — | 15 | ~1915 |
| Francis Mccormick | Son | — | 22 | ~1908 |
| Maurice Mccormick | Son | — | 19 | ~1911 |
Census Appearances
1920
Powell, Montana
Daughter, age 1
Powell, Montana · implied b. ~1919 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Wisconsin |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Powell, Montana
Daughter, age 12
Powell, Montana · implied b. ~1918 — 7 household members
| Surname | McCormick |
| Given Name | Mary E. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Wisconsin |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Powell-County, Montana
Daughter, age 22
Powell-County, Montana · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | MacCormick |
| Given Name | Mary Elizabeth |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Deer Lodge City |
| 1935 Residence (County) | Powell |
| Occupation | Operator |
| Industry | Telephone Co. |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 242 |
| Highest Grade | H 4 |
| 1935 Residence | Same House |
| 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 Mccormick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Alice Maccormick (~0.92 confidence) and mother Alice Mccormick (~0.92 confidence) and father Leslie Mccormick (~0.92 confidence) and father Luke Mccormick (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Alice Maccormick
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Alice Mccormick
b. ~1879
Source mother
● Household
· direct · ~0.92
Father
Leslie Mccormick
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Luke Mccormick
b. ~1880
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Mccormick
Daughter · 1930 · age 12 · b. ~1918 · Montana
★ You are viewing this record
Sibling
Leo Mccormick
Sibling · 1930 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Evelyn Mccormick
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Mccormick
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Maurice Mccormick
Sibling · 1930 · age 19
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
1930 US Federal Census — Powell, Montana
Open full size
1930 US Federal Census — Powell, Montana
Page Contents
13 people indexed on this census page (ia:1930:15thcensus1260unit:0608)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Norman J. Ryder | 40 | Head | Captain Of Police | England |
| 2 | Ellen Ryder | 51 | Wife-H | None | England |
| 3 | Inez M. Ryder | 23 | Daughter | Stenographer | Canada-English |
| 4 | Norman J. Ryder | 21 | Son | Laborer | Canada-English |
| 5 | Leslie J. Ryder | 15 | Son | None | Washington |
| 6 | Francis W. Witham | 11 | Lodger | None | Washington |
| 7 | Luke J. Mccormick | 50 | Head | Locomotive Engineer | Pennsylvania |
| 8 | Alice A. Mccormick | 50 | Wife-H | None | Wisconsin |
| 9 | Francis R. Mccormick | 22 | Son | None | Wisconsin |
| 10 | Evelyn G. Mccormick | 21 | Daughter | None | Wisconsin |
| 11 | Maurice J. Mccormick | 19 | Son | None | Montana |
| 12 | Leo P. Mccormick | 15 | Son | None | Montana |
| 13 | Mary E. Mccormick THIS PERSON | 12 | Daughter | None | Montana |
Pedigree Summary
Mary + 4 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)