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Jack Anderson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Jefferson-County, Idaho
Our Model Tree links this Jack Anderson across the 1930 and 1940 US Censuses in Jefferson-County, Idaho (XGBoost, ~Confirmed) — first a son (b.~1931), then head of a 8-person household.
Age 9
b. ~1931
Male
Son
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Jefferson-County, Idaho |
| Surname | Anderson |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Clark Precinct |
| 1935 Residence (County) | Jefferson |
| Additional Details | |
| Highest Grade | No 3 |
| 1935 Residence | Same house |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Township / Ward | Clark Precinct |
| Est. Birth Year | ~1931 |
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 Jack | Age | Birth yr |
|---|---|---|---|---|
| Mayda Anderson | Daughter | — | 18 | ~1922 |
| Riley Anderson | Head | — | 48 | ~1892 |
| Lula Anderson | Spouse | — | 36 | ~1904 |
| Leon Anderson | Son | — | 24 | ~1916 |
| Dick Watsell | Other | — | 9 | ~1931 |
| Lilia Watsell | Other | — | 14 | ~1926 |
| Jack Anderson | Son | — | 9 | ~1931 |
| Vera Anderson | Daughter | — | 16 | ~1924 |
Census Appearances
1930
Jefferson, Idaho
Son, age
Jefferson, Idaho · implied b. ~1930 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Anderson |
| Given Name | Jack E |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Idaho |
| Mother's Birthplace | Utah |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Jefferson-County, Idaho
Son, age 9
Jefferson-County, Idaho · implied b. ~1931 — 8 household members
| Surname | Anderson |
| Given Name | Jack |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 9 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Clark Precinct |
| 1935 Residence (County) | Jefferson |
| Highest Grade | No 3 |
| 1935 Residence | Same house |
| 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 Jack Anderson across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Jack Anderson
Son · 1940 · age 9 · b. ~1931 · Idaho
★ You are viewing this record
Sibling
Leon Anderson
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mayda Anderson
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Vera Anderson
Sibling · 1940 · age 16
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 — Jefferson-County, Idaho
Open full size
1940 US Federal Census — Jefferson-County, Idaho
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00747-00509)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elwood Madsen | 24 | Head | Farmer | Idaho |
| 42 | Eva Madsen | 24 | Wife | — | Idaho |
| 43 | Lana Madsen | 2 | Daughter | — | — |
| 44 | E. W. Madsen | 64 | Head | Farmer | Utah |
| 45 | Liddie Madsen | 60 | Wife | — | Utah |
| 46 | Nels Neilson | 64 | Head | Farmer | Utah |
| 47 | Isabella Neilson | 61 | Wife | — | Utah |
| 48 | Lyle Neilson | 33 | Son | Herder | Idaho |
| 49 | Gladys Neilson | 23 | Daughter | Teacher | Idaho |
| 50 | Vonda Neilson | 21 | Daughter | Teacher | Idaho |
| 51 | Reed Neilson | 16 | Son | Bee Keeper | Idaho |
| 52 | Gomer Mobley | 51 | Head | Laborer | Nebraska |
| 53 | Kate Mobley | 52 | Wife | — | Nebraska |
| 54 | Keith Mobley | 11 | Son | — | Idaho |
| 55 | Margret Mobley | 3 | Daughter | — | — |
| 56 | Riley Anderson | 48 | Head | Road Driver | Utah |
| 57 | Lula Anderson | 36 | Wife | — | Utah |
| 58 | Leon Anderson | 24 | Son | Laborer | Idaho |
| 59 | Mayda Anderson | 18 | Daughter | — | Idaho |
| 60 | Vera Anderson | 16 | Daughter | — | Idaho |
| 61 | Jack Anderson THIS PERSON | 9 | Son | — | Idaho |
| 62 | Lilia Watsell | 14 | Step-dau | — | Idaho |
| 63 | Dick Watsell | 9 | Step-son | — | Idaho |
| 64 | Joseph Mcneil | 47 | Head | Farmer | Idaho |
| 65 | Sarah Mcneil | 42 | Wife | — | Idaho |
| 66 | James Purser | 30 | Head | Laborer | Idaho |
| 67 | Viola Purser | 32 | Wife | — | Idaho |
| 68 | Keith Purser | 8 | Daughter | — | Idaho |
| 69 | Judy Purser | 5 | Daughter | — | Idaho |
| 70 | Dennis Purser | 0 | Son | — | — |
| 71 | Harvey Heeman | 32 | Head | Farmer | Wyoming |
| 72 | Vera Heeman | 32 | Wife | — | Idaho |
| 73 | Del Heeman | 10 | Son | — | Idaho |
| 74 | Glen Heeman | 3 | Son | — | — |
| 75 | Elwin Rolfe | 20 | Head | Laborer | Idaho |
| 76 | Nellie Rolfe | 24 | Wife | — | Idaho |
| 77 | Charles Balmfirth | 65 | Head | — | Utah |
| 78 | Sarah Balmfirth | 65 | Wife | — | England |
| 79 | Norma Balmfirth | 25 | Daughter | — | Utah |
| 80 | Jack Balmfirth | 27 | Son | — | 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)