MC
Mary Carr — 1940 US Census Record
Model Tree available1940 United States Federal Census · Salt-Lake-County, Utah
Our Model Tree links this Mary Carr across the 1920, 1930 and 1940 US Censuses in Salt-Lake-County, Utah (XGBoost, ~Confirmed), with identified parents Alexander & Carolina — first a daughter (b.~1912), then head of a 3-person household.
Age 28
b. ~1912
Female
Daughter
Born: Utah
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Salt-Lake-County, Utah |
| Surname | Carr |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Law Office |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
| Occupation | Stenographer |
| Township / Ward | Salt Lake 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Carr | Daughter | — | 28 | ~1912 |
| Alexander Carr | Head | — | 65 | ~1875 |
| Caroline Carr | Spouse | — | 63 | ~1877 |
Census Appearances
1920
Salt Lake, …
Daughter, age 11
Salt Lake, Utah · implied b. ~1909 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carr |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1930
Salt Lake, …
Daughter, age 20
Salt Lake, Utah · implied b. ~1910 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carr |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Utah |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Occupation | Stenographer |
| Industry | Attorney |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Utah |
| Birth Country | United States |
| Birthplace (normalized) | utah |
1940
Salt-Lake-County, Utah
Daughter, age 28
Salt-Lake-County, Utah · implied b. ~1912 — 3 household members
| Surname | Carr |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Single |
| Birthplace | Utah |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Occupation | Stenographer |
| Industry | Law Office |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1500 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| 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 Carr across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Alexander Carr (~0.92 confidence) and mother Carolina Carr (~0.92 confidence) and mother Caroline Carr (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alexander Carr
b. ~1875
Source father
● Household
· direct · ~0.92
Mother
Carolina Carr
b. ~1877
Source mother
● Household
· direct · ~0.92
Mother
Caroline Carr
b. ~1877
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Carr
Daughter · 1940 · age 28 · b. ~1912 · 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
34 people indexed on this census page (nara:1940:m-t0627-04226-00269)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Frank R. Barker | 24 | Head | Plumber | Utah |
| 2 | Marie P. Barker | 22 | Wife | Transit Clerk | Utah |
| 3 | Robert R. Smith | 55 | Head | Day Laborer | Texas |
| 4 | La Vaughn Smith | 11 | Daughter | — | Utah |
| 6 | H. T. Riddell | 32 | Head | Locomotive Fireman | Virginia |
| 7 | Ellen Riddell | 33 | Wife | — | Idaho |
| 8 | Donna Mae Riddell | 10 | Daughter | — | Idaho |
| 9 | Joan Riddell | 8 | Daughter | — | Idaho |
| 10 | William Riddell | 7 | Son | — | Idaho |
| 11 | Marlene Riddell | 5 | Daughter | — | Idaho |
| 12 | George N. Brunker | 57 | Head | Locomotive Engineer | Utah |
| 13 | Blanche Brunker | 50 | Wife | — | Utah |
| 14 | Grant Brunker | 13 | Son | — | Utah |
| 15 | Marjorie Jepperson | 18 | Niece | Marker | Utah |
| 17 | George E. May | 57 | Head | Carpenter | Denmark |
| 18 | Mina D. May | 52 | Wife | Seamstress | Utah |
| 19 | Wilbur May | 14 | Son | — | Oregon |
| 20 | Eugene May | 12 | Son | — | Oregon |
| 22 | Ray L. Peterson | 45 | Head | Electrician | Utah |
| 23 | Florence M. Peterson | 43 | Wife | — | Kansas |
| 25 | Thomas B. Frazier | 54 | Head | Conductor | West Virginia |
| 26 | Cornelia Frazier | 53 | Wife | — | Illinois |
| 28 | Alexander Carr | 65 | Head | Abstractor | Utah |
| 29 | Mary Carr THIS PERSON | 28 | Daughter | Stenographer | Utah |
| 30 | Caroline Carr | 63 | Wife | — | Utah |
| 31 | Marie Lish | 43 | Head | — | Kansas |
| 32 | Howard S. Lish | 21 | Son | Window Display | Idaho |
| 33 | Iola Lish | 19 | Daughter | Waitress | Idaho |
| 34 | Helen Lish | 16 | Daughter | — | Idaho |
| 35 | Rex Lish | 14 | Son | — | Idaho |
| 36 | Barbara Lish | 10 | Daughter | — | Idaho |
| 37 | Janet Lish | 4 | Daughter | — | Utah |
| 38 | John T. Edward | 73 | Head | Meat Cutter | Utah |
| 39 | Elizabeth P. Edward | 65 | Sister | Teacher | Utah |
Pedigree Summary
Mary
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)