RC
Richard Cook — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dakota-County, Minnesota
Our Model Tree links this Richard Cook across the 1930 and 1940 US Censuses in Dakota-County, Minnesota (XGBoost, ~Confirmed) — first a son (b.~1928), then head of a 9-person household.
Age 12
b. ~1928
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dakota-County, Minnesota |
| Surname | Cook |
| Given Name | Richard L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Farmington |
| 1935 Residence (County) | Dakota |
| Additional Details | |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Township / Ward | Farmington |
| 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.
9 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Richard | Age | Birth yr |
|---|---|---|---|---|
| Mary Cook | Daughter | — | 6 | ~1934 |
| Gerald Cook | Son | — | 10 | ~1930 |
| Lucille Cook | Spouse | — | 45 | ~1895 |
| Earl Cook | Son | — | 20 | ~1920 |
| Howard Cook | Son | — | 14 | ~1926 |
| Bertram Cook | Head | — | 49 | ~1891 |
| Richard Cook | Son | — | 12 | ~1928 |
| Jane Cook | Daughter | — | 18 | ~1922 |
| Roger Cook | Son | — | 8 | ~1932 |
Census Appearances
1930
Dakota, Minnesota
Son, age 2
Dakota, Minnesota · implied b. ~1928 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cook |
| Given Name | Richard |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 2 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Minnesota |
| Mother's Birthplace | Minnesota |
| Can Read/Write | No |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Dakota-County, Minnesota
Son, age 12
Dakota-County, Minnesota · implied b. ~1928 — 9 household members
| Surname | Cook |
| Given Name | Richard L. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Farmington |
| 1935 Residence (County) | Dakota |
| Highest Grade | No 6 |
| 1935 Residence | Same house |
| 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 Richard Cook across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Richard Cook
Son · 1940 · age 12 · b. ~1928 · Minnesota
★ You are viewing this record
Sibling
Mary Cook
Sibling · 1940 · age 6
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gerald Cook
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Earl Cook
Sibling · 1940 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Roger Cook
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jane Cook
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Howard Cook
Sibling · 1940 · age 14
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 — Dakota-County, Minnesota
Open full size
1940 US Federal Census — Dakota-County, Minnesota
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01917-00156)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marvin L. Pietsch | 29 | Head | Truck Driver | Minnesota |
| 42 | Margaret M. Pietsch | 29 | Wife | — | Minnesota |
| 43 | Marilyn A. Pietsch | 4 | Daughter | — | Minnesota |
| 44 | Katherine M. Pietsch | 3 | Daughter | — | Minnesota |
| 45 | Richard L. Pietsch | 1 | Son | — | Minnesota |
| 46 | Mervel D. Dilley | 30 | Head | Auto Painter | Minnesota |
| 47 | Esther L. Dilley | 30 | Wife | — | Minnesota |
| 48 | Kenneth E. Dilley | 2 | Son | — | Minnesota |
| 49 | Stella M. Judson | 53 | Head | Librarian | Minnesota |
| 50 | Belle F. Mcdonald | 63 | Sister | — | Minnesota |
| 51 | Stella D. Mcdonald | 22 | Niece | Assembler | Canada-Eng |
| 52 | Wm. J. Hoffman | 79 | Head | — | Minnesota |
| 53 | Laura L. Hoffman | 49 | Daughter | — | Minnesota |
| 54 | William H. Ehlers | 67 | Head | — | Minnesota |
| 55 | Lavina S. Ehlers | 60 | Wife | — | Minnesota |
| 56 | Anna G. Michel | 81 | Mother-in-law | — | Minnesota |
| 57 | Sylvester C. Whitcher | 55 | Head | Salesman | Minnesota |
| 58 | Ethel B. Whitcher | 54 | Wife | — | North Dakota |
| 59 | Annie B. Boyce | 78 | Mother-in-law | — | Wisconsin |
| 60 | Bertram L. Cook | 49 | Head | Salesman | Minnesota |
| 61 | Lucille M. Cook | 45 | Wife | — | Minnesota |
| 62 | Earl L. Cook | 20 | Son | — | Minnesota |
| 63 | Jane F. Cook | 18 | Daughter | — | Minnesota |
| 64 | Howard B. Cook | 14 | Son | — | Minnesota |
| 65 | Richard L. Cook THIS PERSON | 12 | Son | — | Minnesota |
| 66 | Gerald R. Cook | 10 | Son | — | Minnesota |
| 67 | Roger G. Cook | 8 | Son | — | Minnesota |
| 68 | Mary E. Cook | 6 | Daughter | — | Minnesota |
| 69 | Merrill L. Stapf | 27 | Head | Gravel Contractor | Minnesota |
| 70 | Vivian C. Stapf | 25 | Wife | — | Minnesota |
| 71 | Myron M. Stapf | 1 | Son | — | Minnesota |
| 72 | Lyle J. Baller | 32 | Head | Manager | Minnesota |
| 73 | Iona R. Baller | 30 | Wife | — | Minnesota |
| 74 | Noreen M. Baller | 1 | Daughter | — | Minnesota |
| 75 | Jessie Rolfing | 26 | Sister-in-law | Typist | Minnesota |
| 76 | Vera R. Atkins | 30 | Lodger | Bookkeeper | South Dakota |
| 77 | Donald E. Partlow | 31 | Head | Fireman | Minnesota |
| 78 | Janet M. Partlow | 27 | Wife | Bookkeeper | Canada-Eng |
| 79 | Bessie M. Louck | 43 | Head | — | Minnesota |
| 80 | June H. Louck | 19 | Daughter | Maid | Minnesota |
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)