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John Mccormick — 1940 US Census Record
Model Tree available1940 United States Federal Census · Hennepin-County, Minnesota
Our Model Tree links this John Mccormick across the 1920, 1930 and 1940 US Censuses in Hennepin-County, Minnesota (XGBoost, ~Confirmed), with identified parents Clara & Clara — first a son (b.~1917), then head of a 4-person household.
Age 23
b. ~1917
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Hennepin-County, Minnesota |
| Surname | McCormick |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Minneapolis |
| 1935 Residence (County) | Hennepin |
| Additional Details | |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Minneapolis |
| 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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Angus Mccormick | Head | — | 60 | ~1880 |
| Robert Mccormick | Son | — | 21 | ~1919 |
| John Mccormick | Son | — | 23 | ~1917 |
| Clara Mccormick | Spouse | — | 62 | ~1878 |
Census Appearances
1920
Hennepin, Minnesota
Son, age 2
Hennepin, Minnesota · implied b. ~1918 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Minnesota |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1930
Hennepin, Minnesota
Son, age 13
Hennepin, Minnesota · implied b. ~1917 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCormick |
| Given Name | John O. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Minnesota |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Hennepin-County, Minnesota
Son, age 23
Hennepin-County, Minnesota · implied b. ~1917 — 4 household members
| Surname | McCormick |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Minneapolis |
| 1935 Residence (County) | Hennepin |
| Highest Grade | C 3 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Mccormick across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Clara Mccormick (~0.92 confidence) and mother Clara Mccormick (~0.92 confidence) and father Angus Mccormick (~0.92 confidence) and father Charles Mccormick (~0.92 confidence) and father Angus Mccormick (~0.92 confidence). The pedigree spans 1 generation with 5 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Clara Mccormick
b. ~1878
Source mother
● Household
· direct · ~0.92
Mother
Clara Mccormick
b. ~1879
Source mother
● Household
· direct · ~0.92
Father
Angus Mccormick
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Charles Mccormick
b. ~1880
Source father
● Household
· direct · ~0.92
Father
Angus Mccormick
b. ~1881
Source father
● Household
· direct · ~0.92
This person
Anchor record
John Mccormick
Son · 1940 · age 23 · b. ~1917 · Minnesota
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Sibling
Robert 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 — Hennepin-County, Minnesota
Open full size
1940 US Federal Census — Hennepin-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01982-00240)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elizabeth Nelson | 19 | Daughter | Bookkeeper | Minnesota |
| 2 | Jane Nelson | 14 | Daughter | — | Minnesota |
| 3 | Angus Mccormick | 60 | Head | Passenger Brakeman | Iowa |
| 4 | Clara Mccormick | 62 | Wife | — | Minnesota |
| 5 | John Mccormick THIS PERSON | 23 | Son | — | Minnesota |
| 6 | Robert Mccormick | 21 | Son | — | Minnesota |
| 7 | Melvin Swanson | 33 | Head | Paymaster | Minnesota |
| 8 | Inez Swanson | 33 | Wife | — | Minnesota |
| 9 | Melvin Jr. Swanson | 9 | Son | — | Minnesota |
| 10 | Donald Swanson | 5 | Son | — | Minnesota |
| 11 | Charles Cronholm | 69 | Father in law | — | Sweden |
| 12 | Albert Larson | 69 | Head | Stationary Engineer | Wisconsin |
| 13 | Maud Larson | 67 | Wife | — | Wisconsin |
| 14 | Catherine Larson | 36 | Daughter | Bookkeeper | Washington |
| 15 | Helen A. Larson | 39 | Daughter | Senior Clerk | Wisconsin |
| 16 | John Larson | 32 | Son | Laborer | Washington |
| 17 | Alvin Smedstad | 48 | Head | Minister | Norway |
| 18 | Marie Smedstad | 48 | Wife | — | Norway |
| 19 | Edith Smedstad | 26 | Daughter | Manicurist | Pennsylvania |
| 20 | Adeline Smedstad | 15 | Daughter | — | New Jersey |
| 21 | Bernice Smedstad | 13 | Daughter | — | Illinois |
| 22 | Blanche Smedstad | 13 | Daughter | — | Illinois |
| 23 | Clara Swisher | 61 | Head | Clerk-Billing | Minnesota |
| 24 | Mary Swisher | 58 | Sister | — | Minnesota |
| 25 | Helma Wold | 68 | Head | — | Norway |
| 26 | Anna Wold | 94 | Mother | — | Norway |
| 27 | Charles Rogers | 46 | Head | Painter | Wisconsin |
| 28 | Edith Rogers | 44 | Wife | — | Wisconsin |
| 29 | Owen Thomas | 68 | Head | Tool & Die Machinist | England |
| 30 | Helen Thomas | 57 | Wife | — | Minnesota |
| 31 | Margaret Nye | 23 | Niece | Adjuster | Minnesota |
| 32 | Helen Nye | 19 | Niece | Stenographer | Minnesota |
| 33 | Kathaleen Nye | 15 | Niece | — | Minnesota |
| 34 | Matilda Carlson | 84 | Head | — | Sweden |
| 35 | Reuben Carlson | 54 | Son | — | Minnesota |
| 36 | Catherine Carlson | 52 | Daughter | — | Minnesota |
| 37 | Charles Lantz | 70 | Head | — | Sweden |
| 38 | Anna Lantz | 68 | Wife | — | Norway |
| 39 | Arthur Mattson | 21 | Lodger | Service Man | Minnesota |
| 40 | Charles Meisner | 56 | Head | Postal Clerk | Minnesota |
Pedigree Summary
John + 1 sibling
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)