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Mary Murdock — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Madison-County, Idaho
Our Model Tree links this Mary Murdock across the 1930 and 1940 US Censuses in Madison-County, Idaho (XGBoost, ~Confirmed) — first a daughter (b.~1929), then head of a 7-person household.
Age 11
b. ~1929
Female
Daughter
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Madison-County, Idaho |
| Surname | Murdock |
| Given Name | Mary I. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Thornton |
| 1935 Residence (County) | Madison |
| Additional Details | |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Township / Ward | Thornton |
| Est. Birth Year | ~1929 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Jannet Murdock | Daughter | — | 19 | ~1921 |
| Mary Murdock | Daughter | — | 11 | ~1929 |
| Lennox Murdock | Daughter | — | 17 | ~1923 |
| Marie Murdock | Daughter | — | 25 | ~1915 |
| Elizabeth Murdock | Head | — | 47 | ~1893 |
| Margaret Murdock | Daughter | — | 24 | ~1916 |
| David Murdock | Son | — | 8 | ~1932 |
Census Appearances
1930
Madison, Idaho
Daughter, age 1
Madison, Idaho · implied b. ~1929 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Murdock |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Madison-County, Idaho
Daughter, age 11
Madison-County, Idaho · implied b. ~1929 — 7 household members
| Surname | Murdock |
| Given Name | Mary I. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Thornton |
| 1935 Residence (County) | Madison |
| Highest Grade | No 4 |
| 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 Mary Murdock across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Murdock
Daughter · 1940 · age 11 · b. ~1929 · Idaho
★ You are viewing this record
Sibling
David Murdock
Sibling · 1940 · age 8
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Murdock
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jannet Murdock
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Marie Murdock
Sibling · 1940 · age 25
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lennox Murdock
Sibling · 1940 · age 17
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 — Madison-County, Idaho
Open full size
1940 US Federal Census — Madison-County, Idaho
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00750-00878)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Patricia Stalker | 5 | daughter | — | Idaho |
| 2 | Allan C. Stalker | 3 | son | — | Idaho |
| 3 | W. J. Martinsen | 48 | head | Farming | Utah |
| 4 | Rosa Martinsen | 44 | wife | — | Idaho |
| 5 | Thelma Martinsen | 23 | daughter | — | Idaho |
| 6 | Keith R. Martinsen | 19 | son | — | Idaho |
| 7 | Stanley Anderson | 30 | head | Farming | Idaho |
| 8 | Glenice Anderson | 28 | wife | — | Idaho |
| 9 | Cora L. Anderson | 2 | daughter | — | Idaho |
| 10 | Maria Anderson | 63 | head | — | Utah |
| 11 | Eldon J. Anderson | 28 | head | Farming | Idaho |
| 12 | Loa Anderson | 22 | wife | — | Idaho |
| 13 | Sherylin Anderson | 2 | daughter | — | Idaho |
| 14 | Hans M. Hansen | 58 | head | Farming | Denmark |
| 15 | Emma Hansen | 60 | wife | — | Utah |
| 16 | Curtis M. Hansen | 34 | son | — | Idaho |
| 17 | Leonard L. Hansen | 30 | son | — | Idaho |
| 18 | Julius N. Hansen | 24 | son | — | Idaho |
| 19 | Dell S. Hansen | 21 | son | — | Idaho |
| 20 | Rulon Hansen | 18 | son | — | Idaho |
| 21 | Orson P. Heileson | 59 | head | — | Utah |
| 22 | Matilda Heileson | 55 | wife | — | Utah |
| 23 | Donna B. Heileson | 15 | daughter | — | Idaho |
| 24 | Weldon Heileson | 11 | son | — | Idaho |
| 25 | Ross Anderson | 24 | head | — | Idaho |
| 26 | Mary Anderson | 24 | wife | — | Idaho |
| 27 | Vern Anderson | 4 | son | — | Idaho |
| 28 | Elva Anderson | 2 | daughter | — | Idaho |
| 29 | Elizabeth Murdock | 47 | head | — | Utah |
| 30 | Marie Murdock | 25 | daughter | — | Utah |
| 31 | Margaret Murdock | 24 | daughter | — | Utah |
| 32 | Jannet Murdock | 19 | daughter | — | Idaho |
| 33 | Lennox M. Murdock | 17 | daughter | — | Idaho |
| 34 | Mary I. Murdock THIS PERSON | 11 | daughter | — | Idaho |
| 35 | David L. Murdock | 8 | son | — | Idaho |
| 36 | Robert P. Hill | 44 | head | — | Wyoming |
| 37 | Hazel Hill | 41 | wife | — | Utah |
| 38 | Donald Hill | 22 | son | — | Idaho |
| 39 | Ariel Hill | 17 | son | — | Idaho |
| 40 | Sarah M. Hill | 12 | 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)