RM
Robert Mccormick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Silver-Bow-County, Montana
Our Model Tree links this Robert Mccormick across the 1920, 1930 and 1940 US Censuses in Silver-Bow-County, Montana (XGBoost, ~Confirmed), with identified parents James & Annie — first a son (b.~1917), then head of a 3-person household.
Age 23
b. ~1917
Male
Son
Born: Montana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Silver-Bow-County, Montana |
| Surname | McCormick |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| Additional Details | |
| Occupation | Houseman |
| Industry | Private home |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 300 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
| Occupation | Houseman |
| Township / Ward | Butte City |
| Est. Birth Year | ~1917 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Robert | Age | Birth yr |
|---|---|---|---|---|
| Robert Mccormick | Son | — | 23 | ~1917 |
| Janice Mccormick | Head | — | 50 | ~1890 |
| Thomas Mccormick | Son | — | 21 | ~1919 |
Census Appearances
1920
Silver Bow, …
Son, age 3
Silver Bow, Montana · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormack |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | Ireland |
| Mother's Birthplace | England |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1930
Silver Bow, …
Son, age 13
Silver Bow, Montana · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Montana |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Montana |
| Birth Country | United States |
| Birthplace (normalized) | montana |
1940
Silver-Bow-County, Montana
Son, age 23
Silver-Bow-County, Montana · implied b. ~1917 — 3 household members
| Surname | McCormick |
| Given Name | Robert |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Montana |
| 1935 Residence (City) | Butte City |
| 1935 Residence (County) | Silver Bow |
| Occupation | Houseman |
| Industry | Private home |
| Class of Worker | PW |
| Hours Worked | 42 |
| Income (1939) | 300 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| 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 Robert Mccormick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father James Mccormack (~0.92 confidence) and mother Annie Mccormack (~0.92 confidence) and mother Janice Mccormick (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
James Mccormack
b. ~1886
Source father
● Household
· direct · ~0.92
Mother
Annie Mccormack
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Janice Mccormick
b. ~1890
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Robert Mccormick
Son · 1940 · age 23 · b. ~1917 · Montana
★ You are viewing this record
Sibling
Thomas Mccormick
Sibling · 1940 · age 21
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 — Silver-Bow-County, Montana
Open full size
1940 US Federal Census — Silver-Bow-County, Montana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-02230-00262)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Leonard L. Ball | 48 | Head | Stationary Eng | Oklahoma |
| 2 | Naomi Ball | 31 | Wife | — | Kansas |
| 3 | Richard S. Ball | 11 | Son | — | Missouri |
| 4 | Ray A. Erickson | 30 | Head | Clerical | Montana |
| 5 | Margaret G. Erickson | 26 | Wife | — | Montana |
| 6 | Helen M. Erickson | 1 | Daughter | — | Montana |
| 7 | Margaret A. Erickson | 0 | Daughter | — | Montana |
| 8 | Walter T. Sanders | 34 | Head | — | Missouri |
| 9 | Sarah Sanders | 26 | Wife | — | Montana |
| 10 | Janice Mccormick | 50 | Head | — | England |
| 11 | Robert Mccormick THIS PERSON | 23 | Son | Houseman | Montana |
| 12 | Thomas Mccormick | 21 | Son | Surface Man | Montana |
| 13 | Mary A. Murray | 70 | Head | — | Ireland |
| 14 | Mary A. Murray | 35 | Daughter | Bookkeeper | Montana |
| 15 | James L. Murray | 38 | Son | Butcher | Montana |
| 16 | Elizabeth Murray | 38 | Daughter | — | Montana |
| 17 | Frank J. Kelly | 24 | Head | Surface Man | Montana |
| 18 | Steve E. Kelly | 29 | Brother | Metal Miner | Montana |
| 19 | Gerald V. Kelly | 26 | Brother | Diamond Dril | Montana |
| 20 | Rita C. Kelly | 22 | Sister | — | Montana |
| 21 | Ronald J. Kelly | 18 | Brother | Metal Miner | Montana |
| 22 | Joseph P. Kelly | 13 | Brother | — | Montana |
| 23 | Minnie Kingston | 71 | Head | — | Ireland |
| 24 | Harry T. Mitchell | 40 | Son-in-law | Clerk | Montana |
| 25 | Anne Mitchell | 40 | Daughter | — | Ireland |
| 26 | Charles Mitchell | 11 | Son | — | Montana |
| 27 | Robert Mitchell | 8 | Son | — | Montana |
| 28 | Margaret Mitchell | 6 | Daughter | — | Montana |
| 29 | John J. Crotty | 42 | Head | Stationary Eng | Montana |
| 30 | Virginia Crotty | 40 | Wife | — | Montana |
| 31 | Dorothy Crotty | 21 | Daughter | — | Montana |
| 32 | John J. Jr. Crotty | 14 | Son | — | Montana |
| 33 | Leslie E. House | 39 | Head | — | Kansas |
| 34 | Ina House | 31 | Wife | — | Oklahoma |
| 35 | Dolly B. House | 12 | Daughter | — | Washington |
| 36 | Esther J. House | 11 | Daughter | — | Washington |
| 37 | James A. House | 9 | Daughter | — | Washington |
| 38 | Donna M. House | 8 | Daughter | — | Washington |
| 39 | Theodore R. Schaffer | 35 | Head | Metal Miner | Oregon |
| 40 | Florence V. Schaffer | 23 | Wife | — | Montana |
Pedigree Summary
Robert + 1 sibling
Gen 1 · 3 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)