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Mary Bird — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Tooele-County, Utah
Our Model Tree links this Mary Bird across the 1930 and 1940 US Censuses in Tooele-County, Utah (XGBoost, ~Confirmed) — first a spouse (b.~1912), then head of a 7-person household.
Age 28
b. ~1912
Female
Spouse
Born: Utah
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Tooele-County, Utah |
| Surname | Bird |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | Tooele City |
| 1935 Residence (County) | Tooele |
| Additional Details | |
| Class of Worker | No |
| Hours Worked | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Township / Ward | Tooele 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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Bird | Spouse | — | 28 | ~1912 |
| Kay Bird | Daughter | — | 7 | ~1933 |
| Paul Bird | Son | — | 5 | ~1935 |
| Rex Bird | Head | — | 32 | ~1908 |
| Fred Bird | Son | — | 9 | ~1931 |
| Ronald Bird | Son | — | 3 | ~1937 |
| Mary Bird | Daughter | — | 2 | ~1938 |
Census Appearances
1930
Tooele, Utah
Spouse, age 18
Tooele, Utah · implied b. ~1912 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Bird |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Married |
| Birthplace | Utah |
| Age at First Marriage | 17 |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read/Write | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Tooele-County, Utah
Spouse, age 28
Tooele-County, Utah · implied b. ~1912 — 7 household members
| Surname | Bird |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Utah |
| 1935 Residence (City) | Tooele City |
| 1935 Residence (County) | Tooele |
| Class of Worker | No |
| Hours Worked | 0 |
| Highest Grade | H 2 |
| 1935 Residence | Same place |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
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 Bird across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Bird
Spouse · 1940 · age 28 · b. ~1912 · Utah
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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 — Tooele-County, Utah
Open full size
1940 US Federal Census — Tooele-County, Utah
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04218-00396)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Jean Mayer | 19 | Daughter | — | Texas |
| 42 | Robert Mayer | 18 | Son | — | Utah |
| 43 | Patricia Mayer | 17 | Daughter | — | Texas |
| 44 | Nancy Mayer | 7 | Daughter | — | Utah |
| 45 | Michael Mayer | 5 | Son | — | Utah |
| 46 | Thomas Tate | 41 | Head | Deputy Sheriff | Utah |
| 47 | Olive P. Tate | 32 | Wife | — | Utah |
| 48 | Colleen Tate | 12 | Daughter | — | Utah |
| 49 | Thomas Tate | 13 | Son | — | Utah |
| 50 | Lindquist Blair Tate | 9 | Step-son | — | Utah |
| 51 | Ralph Riley | 39 | Head | Switchman | Colorado |
| 52 | Irene P. Riley | 26 | Wife | — | Idaho |
| 53 | Ardith Riley | 7 | Daughter | — | Utah |
| 54 | Rex Bird | 32 | Head | Mechanic | Utah |
| 55 | Mary Bird THIS PERSON | 28 | Wife | — | Utah |
| 56 | Fred Bird | 9 | Son | — | Utah |
| 57 | Kay Bird | 7 | Daughter | — | Utah |
| 58 | Paul Bird | 5 | Son | — | Utah |
| 59 | Ronald Bird | 3 | Son | — | Utah |
| 60 | Mary Lou Bird | 2 | Daughter | — | Utah |
| 61 | Keith Brande | 34 | Head | Millman | Utah |
| 62 | Mary Brande | 31 | Wife | — | Utah |
| 63 | Clifford Brande | 10 | Son | — | Utah |
| 64 | Delma Brande | 6 | Daughter | — | Utah |
| 65 | Delton Brande | 4 | Son | — | Utah |
| 66 | William Angie | 18 | Lodger | Boiler Maker Helper | Utah |
| 67 | Bridge Brown | 36 | Head | Helper | Idaho |
| 68 | Blanche Brown | 29 | Wife | — | Utah |
| 69 | Colleen Brown | 10 | Daughter | — | Utah |
| 70 | Darlan Brown | 6 | Daughter | — | Utah |
| 71 | Byron Wood | 37 | Head | Manager | Utah |
| 72 | Ruth Wood | 38 | Wife | — | Utah |
| 73 | James Smith | 42 | Head | Miner | Utah |
| 74 | Helen Smith | 37 | Wife | — | Utah |
| 75 | Marjorie Smith | 9 | Daughter | — | Utah |
| 76 | Gerald Smith | 5 | Son | — | Utah |
| 77 | Nancy Smith | 3 | Daughter | — | Utah |
| 78 | Ernest Alago | 37 | Head | Chemist | Utah |
| 79 | Virginia Alago | 35 | Wife | — | Utah |
| 80 | Irene Alago | 11 | Son | — | Utah |
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)