MC
Mary Chapman — 1940 US Census Record
Model Tree available1940 United States Federal Census · Salt-Lake-County, Utah
Our Model Tree links this Mary Chapman across the 1920, 1930 and 1940 US Censuses in Salt-Lake-County, Utah (XGBoost, ~Confirmed), with identified parents Birdie & Birdie — first a daughter (b.~1919), then head of a 2-person household.
Age 21
b. ~1919
Female
Daughter
Born: Idaho
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Salt-Lake-County, Utah |
| Surname | Chapman |
| Given Name | Mary R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Additional Details | |
| Occupation | School teacher |
| Industry | Public school |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 284 |
| Highest Grade | C 4 |
| 1935 Residence | Same house |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
| Occupation | Teacher |
| Township / Ward | Salt Lake City |
| Est. Birth Year | ~1919 |
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 Chapman | Daughter | — | 21 | ~1919 |
| Birdie Chapman | Head | — | 51 | ~1889 |
Census Appearances
1920
Salt Lake, …
Daughter, age 3
Salt Lake, Utah · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Mary R. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read | No |
| Can Write | No |
| Speaks English | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1930
Salt Lake, …
Daughter, age 11
Salt Lake, Utah · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | Mary B |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Idaho |
| Father's Birthplace | Utah |
| Mother's Birthplace | Utah |
| Can Read/Write | Yes |
| Birth State | Idaho |
| Birth Country | United States |
| Birthplace (normalized) | idaho |
1940
Salt-Lake-County, Utah
Daughter, age 21
Salt-Lake-County, Utah · implied b. ~1919 — 2 household members
| Surname | Chapman |
| Given Name | Mary R |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Idaho |
| 1935 Residence (City) | Salt Lake City |
| 1935 Residence (County) | Salt Lake |
| Occupation | School teacher |
| Industry | Public school |
| Class of Worker | PW |
| Hours Worked | 30 |
| Income (1939) | 284 |
| Highest Grade | C 4 |
| 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 Mary Chapman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Birdie Chapman (~0.92 confidence) and mother Birdie Chapman (~0.92 confidence) and father Emmett Green (~0.92 confidence) and mother Mildred Green (~0.60 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.84
Mother
Birdie Chapman
b. ~1889
Source mother
● Household
· direct · ~0.92
Mother
Birdie Chapman
b. ~1889
Source mother
● Household
· direct · ~0.92
Father
Emmett Green
b. ~1903
Source father
● Household
· direct · ~0.92
Mother
Mildred Green
b. ~1909
Source mother
● Household
· direct · ~0.6
This person
Anchor record
Mary Chapman
Daughter · 1940 · age 21 · b. ~1919 · 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-t0627-04227-00487)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Birdie S Chapman | 51 | Head | School Teacher | Utah |
| 2 | Mary R Chapman THIS PERSON | 21 | Daughter | School Teacher | Idaho |
| 3 | Selma S Rydman | 62 | Head | Maid | Sweden |
| 4 | Clarence S Harwood | 37 | Head | Roofer | Utah |
| 5 | Violet E Harwood | 35 | Wife | — | Utah |
| 6 | Don C Harwood | 7 | Son | — | Utah |
| 7 | Richard Harwood | 5 | Son | — | Utah |
| 8 | Arthur Harwood | 2 | Son | — | Utah |
| 9 | John E Shafer | 78 | Head | — | Ohio |
| 10 | Orvilla Shafer | 75 | Wife | — | Utah |
| 11 | William M Jennings | 62 | Head | Brakeman | Wisconsin |
| 12 | Alda M Jennings | 60 | Wife | — | Utah |
| 13 | Iva Rasmussen | 26 | Head | Chief Clerk | Utah |
| 14 | Lois Rasmussen | 26 | Wife | Stenographer | Idaho |
| 15 | John Pritchard | 25 | Head | Civil Engineer | Utah |
| 16 | Dorothy Pritchard | 24 | Wife | — | Utah |
| 17 | John Pritchard | 0 | Son | — | Utah |
| 18 | Royal S Barney | 79 | Head | — | Utah |
| 19 | Elizabeth T Barney | 79 | Wife | — | Nebraska |
| 20 | Bertha Barney | 55 | Daughter | School Teacher | Utah |
| 21 | Mary B Swift | 44 | Daughter | Assistant Cook | Utah |
| 22 | Lois Swift | 18 | Granddaughter | — | Utah |
| 23 | Edward S Kramer | 57 | Head | Supervisor | Missouri |
| 24 | Grace E Kramer | 56 | Wife | — | Iowa |
| 25 | Harem Mechling | 77 | Head | — | Pennsylvania |
| 26 | Maude Steller | 58 | Head | Supervisor | Utah |
| 27 | Olive Boyack | 29 | Head | — | Utah |
| 28 | Verlin Boyack | 9 | Son | — | Utah |
| 29 | Renee Boyack | 6 | Daughter | — | Utah |
| 30 | Harold Boyack | 2 | Son | — | Utah |
| 31 | Ronald Morris | 27 | Head | Truck Driver | Utah |
| 32 | Esther I Morris | 23 | Wife | — | Utah |
| 33 | Marlene L Morris | 3 | Daughter | — | Utah |
| 34 | Joyce Edna Morris | 0 | Daughter | — | Utah |
| 35 | Bertha S Etherington | 35 | Head | — | Utah |
| 36 | Melba Etherington | 17 | Daughter | — | Utah |
| 37 | Jean Etherington | 14 | Daughter | — | Utah |
| 38 | John Etherington | 6 | Son | — | Utah |
| 39 | Alfred P Soloman | 25 | Head | Stock Clerk | Utah |
| 40 | Roxy Soloman | 24 | Wife | — | Utah |
Pedigree Summary
Mary
Gen 1 · 4 parents
~0.84
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)