MS
Mary Spencer — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Salt-Lake-County, Utah
Our Model Tree links this Mary Spencer across the 1920, 1930 and 1940 US Censuses in Salt-Lake-County, Utah (XGBoost, ~Confirmed) — first a head (b.~1862), then head of a 2-person household.
Age 78
b. ~1862
Female
Head
Born: England
Widowed
1940 Census Record Details
| Census Year | 1940 |
| Location | Salt-Lake-County, Utah |
| Surname | Spencer |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 78 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Naturalization Status | Naturalized |
| Additional Details | |
| Occupation | Gardner |
| Industry | WPA |
| Class of Worker | GW |
| Hours Worked | 43 |
| Income (1939) | 200 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth Country | England |
| Birthplace (normalized) | england |
| Occupation | Gardner |
| Township / Ward | Salt Lake City |
| Est. Birth Year | ~1862 |
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.
2 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Spencer | Daughter | — | 17 | ~1923 |
| Mary Spencer | Head | — | 78 | ~1862 |
Census Appearances
1920
Salt Lake, …
Head, age 57
Salt Lake, Utah · implied b. ~1863 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Spencer |
| Given Name | Mary Ann |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 57 |
| Marital Status | Widowed |
| Birthplace | England |
| Year of Immigration | 1881 |
| Naturalization Status | Naturalized |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | England |
| Year of Naturalization | 1892 |
| Birthplace (normalized) | england |
1930
Salt Lake, …
Head, age 68
Salt Lake, Utah · implied b. ~1862
●
Primary link
· ~Confirmed · 1 source
XGBoost
| Surname | Spencer |
| Given Name | Mary A. |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 68 |
| Marital Status | Widowed |
| Birthplace | England |
| Naturalization Status | Naturalized |
| Year of Immigration | 1881 |
| Father's Birthplace | England |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 2000 |
| Birth Country | England |
| Birthplace (normalized) | england |
1940
Salt-Lake-County, Utah
Head, age 78
Salt-Lake-County, Utah · implied b. ~1862 — 2 household members
| Surname | Spencer |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 78 |
| Marital Status | Widowed |
| Birthplace | England |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Naturalization Status | Naturalized |
| Occupation | Gardner |
| Industry | WPA |
| Class of Worker | GW |
| Hours Worked | 43 |
| Income (1939) | 200 |
| Highest Grade | No 7 |
| 1935 Residence | Same house |
| Birth Country | England |
| Birthplace (normalized) | england |
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 Spencer across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Spencer
Head · 1940 · age 78 · b. ~1862 · Utah
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Salt-Lake-County, Utah
Open full size
1940 US Federal Census — Salt-Lake-County, Utah
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04226-00225)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Archer N. Hansen | 50 | Head | Painter | Utah |
| 2 | Ida N. Hansen | 50 | Wife | — | Sweden |
| 3 | Homer Guthrie | 25 | Head | Clerk | Utah |
| 4 | Connie R. Guthrie | 5 | Daughter | — | Utah |
| 5 | Zena Guthrie | 19 | Daughter | Housemaid | Utah |
| 6 | Meraf Guthrie | 13 | Daughter | — | Utah |
| 7 | Carol Guthrie | 10 | Daughter | — | Utah |
| 8 | Frank H. Bellenback | 39 | Head | Watchman | Utah |
| 9 | Leona Bellenback | 31 | Wife | — | Utah |
| 10 | Donna M. Bellenback | 6 | Daughter | — | Utah |
| 11 | Donald F. Bellenback | 6 | Son | — | Utah |
| 12 | Barbara Bellenback | 4 | Daughter | — | Utah |
| 13 | Robert K. Bellenback | 2 | Son | — | Utah |
| 14 | Dorothy Bellenback | 1 | Daughter | — | Utah |
| 15 | Albert T. Nash | 54 | Head | Laborer | Oklahoma |
| 16 | Clara B. Nash | 57 | Wife | — | England |
| 17 | Afton Nash | 18 | Daughter | — | Utah |
| 18 | Ladonna Nash | 16 | Daughter | — | Utah |
| 19 | John K. Nash | 13 | Son | — | Utah |
| 20 | Samuel Spears | 43 | Head | Brakeman | Michigan |
| 21 | Margie Spears | 40 | Wife | — | Illinois |
| 22 | Billie Spears | 13 | Son | — | Arizona |
| 23 | Mary Spears | 7 | Daughter | — | Utah |
| 24 | David Spears | 3 | Son | — | Utah |
| 25 | Bertha Spears | 12 | Daughter | — | Utah |
| 26 | Mary Spencer THIS PERSON | 78 | Head | Gardner | England |
| 27 | Mary C. Spencer | 17 | Daughter | Student | Utah |
| 28 | Clarence Wilson | 44 | Head | Barber | Indiana |
| 29 | Luella Wilson | 35 | Wife | — | Utah |
| 30 | Louise Jennings | 28 | Head | Laborer | Utah |
| 31 | Violet B. Jennings | 28 | Wife | — | Utah |
| 32 | Betty Lou Jennings | 9 | Daughter | — | Utah |
| 33 | Gerald Jennings | 7 | Son | — | Utah |
| 34 | Elmer Gray | 35 | Head | Mechanic | Utah |
| 35 | Juanita Gray | 38 | Wife | — | Illinois |
| 36 | James E. Gray | 4 | Son | — | Utah |
| 37 | Clarence D. Gray | 42 | Head | Mechanic | Utah |
| 38 | Blanche Gray | 37 | Wife | — | Utah |
| 39 | Gary R. Gray | 3 | Son | — | Utah |
| 40 | Juanita A. Gray | 4 | Daughter | — | 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)