MC
Mary Chandler — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Oregon
Our Model Tree links this Mary Chandler across the 1920, 1930 and 1940 US Censuses in Marion-County, Oregon (XGBoost, ~Confirmed), with identified parents William & Rosa — first a daughter (b.~1901), then head of a 4-person household.
Age 39
b. ~1901
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Oregon |
| Surname | Chandler |
| Given Name | Mary Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Rosedale Precinct |
| Additional Details | |
| Occupation | Technician |
| Industry | Private Office |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 921 |
| Highest Grade | H-4 |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Occupation | Technician |
| Township / Ward | Rosedale Precinct |
| Est. Birth Year | ~1901 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Rosa Chandler | Spouse | — | 81 | ~1859 |
| William Chandler | Head | — | 81 | ~1859 |
| Mary Chandler | Daughter | — | 39 | ~1901 |
| Albert Chandler | Son | — | 50 | ~1890 |
Census Appearances
1920
Marion, Oregon
Daughter, age 18
Marion, Oregon · implied b. ~1902 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chandler |
| Given Name | Mary G. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Missouri |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1930
Marion, Oregon
Daughter, age 29
Marion, Oregon · implied b. ~1901 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chandler |
| Given Name | Mary G. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 29 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Missouri |
| Occupation | Dentist |
| Industry | Dentistry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
Marion-County, Oregon
Daughter, age 39
Marion-County, Oregon · implied b. ~1901 — 4 household members
| Surname | Chandler |
| Given Name | Mary Grace |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 39 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | Rosedale Precinct |
| Occupation | Technician |
| Industry | Private Office |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 921 |
| Highest Grade | H-4 |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Chandler across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father William Chandler (~0.92 confidence) and mother Rosa Chandler (~0.92 confidence) and father W Chandler (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
William Chandler
b. ~1859
Source father
● Household
· direct · ~0.92
Mother
Rosa Chandler
b. ~1860
Source mother
● Household
· direct · ~0.92
Father
W Chandler
b. ~1860
Source father
● Household
· direct · ~0.92
This person
Anchor record
Mary Chandler
Daughter · 1940 · age 39 · b. ~1901 · Oregon
★ You are viewing this record
Sibling
Albert Chandler
Sibling · 1940 · age 50
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 — Marion-County, Oregon
Open full size
1940 US Federal Census — Marion-County, Oregon
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-03374-00253)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Chester Mcneil | 17 | Son | Laborer | Kansas |
| 42 | Imogene Mcneil | 10 | Daughter | — | Kansas |
| 43 | Lloyd H. Phillips | 42 | Head | Farmer | Iowa |
| 44 | Ruth A. Phillips | 36 | Wife | — | Iowa |
| 45 | Edward Phillips | 15 | Son | — | Iowa |
| 46 | Richard Phillips | 14 | Son | — | Iowa |
| 47 | Beverley Phillips | 10 | Daughter | — | Iowa |
| 48 | Donald Phillips | 5 | Son | — | Iowa |
| 49 | William D. Chandler | 81 | Head | Farmer | Kansas |
| 50 | Rosa Chandler | 81 | Wife | — | Missouri |
| 51 | Albert L. Chandler | 50 | Son | Farmer | Missouri |
| 52 | Mary Grace Chandler THIS PERSON | 39 | Daughter | Technician | Missouri |
| 53 | George T. A. Heckert | 62 | Head | — | Missouri |
| 54 | Bertha Heckert | 55 | Wife | — | Missouri |
| 55 | William R. Cole | 3 | Grandson | — | Oregon |
| 56 | Ray M. Heckert | 32 | Head | Farmer | Missouri |
| 57 | Violet A. Heckert | 25 | Wife | — | Montana |
| 58 | Larry Joe Heckert | 3 | Son | — | Oregon |
| 59 | John C. Pearson | 54 | Head | Farmer | Ohio |
| 60 | Fern M. Pearson | 42 | Wife | — | Missouri |
| 61 | Dale Pearson | 6 | Son | — | Oregon |
| 62 | Edwin O. A. Buckley | 56 | Head | Farmer | Minnesota |
| 63 | Eva M. Buckley | 55 | Wife | — | Oregon |
| 64 | Helen Buckley | 22 | Daughter | — | Oregon |
| 65 | Hulda Buckley | 17 | Daughter | — | Oregon |
| 66 | William M. Belgard | 57 | Head | Laborer | Montana |
| 67 | Millie A. Belgard | 50 | Wife | — | Montana |
| 68 | Lester Belgard | 21 | Son | Farm Laborer | Montana |
| 69 | Bernard Belgard | 20 | Son | Farm Laborer | Montana |
| 70 | Theodore Belgard | 19 | Son | Farm Laborer | Montana |
| 71 | Ruby Belgard | 16 | Daughter | — | Washington |
| 72 | Benjamin Belgard | 8 | Son | — | Oregon |
| 73 | Lawrence A. Brown | 54 | Head | Laborer | Texas |
| 74 | Sadie E. Brown | 55 | Wife | — | Nebraska |
| 75 | Lloyd O. Weaver | 31 | Head | Laborer | Oregon |
| 76 | Helen A. Weaver | 38 | Wife | — | Oregon |
| 77 | Claude Weaver | 9 | Son | — | Oregon |
| 78 | Loretta Weaver | 6 | Daughter | — | Oregon |
| 79 | Edward D. Wentworth | 39 | Head | Laborer | New York |
| 80 | Olive Wentworth | 23 | Wife | — | Montana |
Pedigree Summary
Mary + 1 sibling
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)