JG
John Grace — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Minidoka-County, Idaho
Our Model Tree links this John Grace across the 1930 and 1940 US Censuses in Minidoka-County, Idaho (XGBoost, ~Confirmed) — first a head (b.~1912), then head of a 8-person household.
Age 28
b. ~1912
Male
Head
Born: Idaho
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Minidoka-County, Idaho |
| Surname | Grace |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (City) | Rupert City |
| 1935 Residence (County) | Minidoka |
| Additional Details | |
| Occupation | rock hauler |
| Industry | highway construction |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 532 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Occupation | Rock Hauler |
| Township / Ward | Rupert City |
| Est. Birth Year | ~1912 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mildred Grace | Spouse | — | 23 | ~1917 |
| Gary Grace | Son | — | 4 | ~1936 |
| Delores Lewis | Other | — | 7 | ~1933 |
| John Grace | Son | — | 3 | ~1937 |
| John Grace | Head | — | 28 | ~1912 |
| Erland Lewis | Other | — | 9 | ~1931 |
| Loren Grace | Son | — | 2 | ~1938 |
| Richard Grace | Son | — | ~1940 |
Census Appearances
1930
Minidoka, Idaho
Son, age 18
Minidoka, Idaho · implied b. ~1912 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grace |
| Given Name | John D. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Kentucky |
| Occupation | Cook |
| Industry | Lunch room |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Minidoka-County, Idaho
Head, age 28
Minidoka-County, Idaho · implied b. ~1912 — 8 household members
| Surname | Grace |
| Given Name | John D. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Idaho |
| 1935 Residence (City) | Rupert City |
| 1935 Residence (County) | Minidoka |
| Occupation | rock hauler |
| Industry | highway construction |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 532 |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
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 Grace across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Grace
Head · 1940 · age 28 · b. ~1912 · Idaho
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Minidoka-County, Idaho
Open full size
1940 US Federal Census — Minidoka-County, Idaho
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-00751-00198)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bessie M. Jamison | 34 | Head | Saleslady | Nebraska |
| 2 | Marjorie E. Jamison | 17 | Daughter | — | Nebraska |
| 3 | Gene K. Jamison | 15 | Son | — | Nebraska |
| 4 | Everett M. Jamison | 14 | Son | — | Nebraska |
| 5 | Dennis A. Jamison | 9 | Son | — | Nebraska |
| 6 | John D. Grace THIS PERSON | 28 | Head | Rock Hauler | Idaho |
| 7 | Mildred L. Grace | 23 | Wife | — | Idaho |
| 8 | Gary Lee Grace | 4 | Son | — | Idaho |
| 9 | John L. Grace | 3 | Son | — | Idaho |
| 10 | Loren J. Grace | 2 | Son | — | Idaho |
| 11 | Richard H. V. Grace | 0 | Son | — | Idaho |
| 12 | Erland E. Lewis | 9 | Step son | — | Idaho |
| 13 | Delores Lewis | 7 | Step daughter | — | Idaho |
| 14 | Harvey A. Jensen | 27 | Head | Meat Cutter | Canada-English |
| 15 | Evelyn V. Jensen | 27 | Wife | — | Utah |
| 16 | Dean F. Jensen | 4 | Son | — | Idaho |
| 17 | Delwyn A. Jensen | 3 | Son | — | Idaho |
| 18 | Royce E. Jensen | 1 | Son | — | Idaho |
| 19 | James H. Gerrity | 46 | Head | Common Labor Road Work | Wyoming |
| 20 | June L. Gerrity | 39 | Wife | — | W. Virginia |
| 21 | Bruno Albert | 56 | Head | Carpenter | Ohio |
| 22 | Agnes H. Albert | 39 | Wife | — | Nebraska |
| 23 | James W. Nenson | 33 | Head | Sales Clerk | Idaho |
| 24 | Ruth E. Nenson | 29 | Wife | — | Utah |
| 25 | Betty R. Nenson | 11 | Daughter | — | Idaho |
| 26 | Joseph J. Simpson | 21 | Law | Auto Mechanic | Idaho |
| 27 | Mary P. Stuart | 58 | Head | House Keeper | Kentucky |
| 28 | Norman D. Jensen | 23 | Head | Street Laborer | Utah |
| 29 | Marie Jensen | 21 | Wife | — | Idaho |
| 30 | Yvonne Jensen | 2 | Daughter | — | Idaho |
| 31 | Samuel F. Blancet | 23 | Head | Welder | Oklahoma |
| 32 | Amelia D. Blancet | 21 | Wife | — | Oklahoma |
| 33 | Marilyn E. Blancet | 2 | Daughter | — | Idaho |
| 34 | James A. Blancet | 0 | Son | — | Idaho |
| 35 | Ivan L. Cole | 32 | Head | Truck Driver | Nebraska |
| 36 | Pearl M. Cole | 30 | Wife | — | Michigan |
| 37 | Ivan L. Jr. Cole | 9 | Son | — | Nebraska |
| 38 | George R. Cole | 5 | Son | — | Nebraska |
| 39 | Jean L. Cole | 4 | Daughter | — | Idaho |
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)