MA
Mary Arnold — 1940 US Census Record
Model Tree available1940 United States Federal Census · King-County, Washington
Our Model Tree links this Mary Arnold across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed), with identified parents Jennings & Ethel — first a daughter (b.~1913), then head of a 5-person household.
Age 27
b. ~1913
Female
Daughter
Born: Washington
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Arnold |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Additional Details | |
| Occupation | operator |
| Industry | telephone general insurance |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1020 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Operator |
| Township / Ward | Seattle City |
| Est. Birth Year | ~1913 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Arnold | Daughter | — | 27 | ~1913 |
| Jennings Arnold | Head | — | 67 | ~1873 |
| William Arnold | Son | — | 24 | ~1916 |
| George Arnold | Son | — | 23 | ~1917 |
| Ethel Arnold | Spouse | — | 54 | ~1886 |
Census Appearances
1920
King, Washington
Daughter, age 7
King, Washington · implied b. ~1913 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Illinois |
| Mother's Birthplace | England |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
King, Washington
Daughter, age 17
King, Washington · implied b. ~1913 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Arnold |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Illinois |
| Mother's Birthplace | England |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Daughter, age 27
King-County, Washington · implied b. ~1913 — 5 household members
| Surname | Arnold |
| Given Name | Mary M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Occupation | operator |
| Industry | telephone general insurance |
| Class of Worker | PW |
| Hours Worked | 44 |
| Income (1939) | 1020 |
| Highest Grade | C 1 |
| 1935 Residence | Same place |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
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 Arnold across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Jennings Arnold (~0.92 confidence) and mother Ethel Arnold (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Jennings Arnold
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Ethel Arnold
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Arnold
Daughter · 1940 · age 27 · b. ~1913 · Washington
★ You are viewing this record
Sibling
William Arnold
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
George Arnold
Sibling · 1940 · age 23
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 — King-County, Washington
Open full size
1940 US Federal Census — King-County, Washington
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-04376-00125)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 42 | Amos L. Schmalle | 52 | Head | Teacher | Iowa |
| 43 | Vinnie S. Schmalle | 52 | Wife | — | Iowa |
| 44 | Robert S. Schmalle | 22 | Son | Mailing Clerk | Washington |
| 45 | Garth W. Schmalle | 26 | Son | Clerk | Oregon |
| 46 | Thomas J. Ivey | 40 | Head | Salesman | Michigan |
| 47 | Louise Ivey | 35 | Wife | — | Idaho |
| 48 | Betty Ivey | 12 | Daughter | — | Washington |
| 49 | Frank Blunden | 63 | Head | Operator | England |
| 50 | Emily Blunden | 50 | Wife | Clerk | England |
| 52 | Ben F. Hamlin | 34 | Head | Instructor | Washington |
| 53 | Lucille M. Hamlin | 30 | Wife | — | Oregon |
| 54 | Ben F. Hamlin | 10 | Son | — | Washington |
| 55 | Herbert J. Mitchell | 37 | Head | Salesman | New York |
| 56 | Violet C. Mitchell | 30 | Wife | — | Canada English |
| 57 | Audrey Mitchell | 7 | Daughter | — | Washington |
| 58 | Shirley Mitchell | 5 | Daughter | — | Washington |
| 59 | Ralph Mitchell | 3 | Son | — | Washington |
| 60 | John Hopper | 37 | Head | Instructor | South Dakota |
| 61 | Helen G. Hopper | 26 | Wife | Instructor | Indiana |
| 62 | Helen A. Hopper | 3 | Daughter | — | Washington |
| 63 | Betty Hopper | 2 | Daughter | — | California |
| 64 | Guy F. Noble | 54 | Head | Manager | Massachusetts |
| 65 | Ruth B. Noble | 51 | Wife | — | Maine |
| 66 | Dewitt Oliver | 46 | Head | Principal Clerk | Texas |
| 67 | Louise Oliver | 42 | Wife | Teacher | New Hampshire |
| 68 | Kathleen Oliver | 9 | Daughter | — | Washington |
| 69 | Harold Wilder | 42 | Head | Watchman | Wisconsin |
| 70 | Frederick Wilder | 16 | Son | — | Washington |
| 71 | Leonard Muinch | 55 | Head | Teacher | Illinois |
| 72 | Fannie Muinch | 58 | Wife | — | Nevada |
| 73 | Frieda Davidson | 58 | Head | — | Missouri |
| 74 | Julia Mosier | 80 | Aunt | — | Wisconsin |
| 75 | Thomas Brown | 64 | Head | Stationary Engineer | Maine |
| 76 | Jennings Arnold | 67 | Head | Agent | Illinois |
| 77 | Ethel Arnold | 54 | Wife | — | England |
| 78 | William J. Arnold | 24 | Son | — | Washington |
| 79 | Mary M. Arnold THIS PERSON | 27 | Daughter | Operator | Washington |
| 80 | George W. Arnold | 23 | Son | — | Washington |
Related Census Records
Pedigree Summary
Mary + 2 siblings
Gen 1 · 2 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)