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Mary Armstrong — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Snohomish, Washington
Our Model Tree links this Mary Armstrong across the 1920 and 1930 US Censuses in Snohomish, Washington (XGBoost, ~Confirmed) — first a daughter (b.~1912), then head of a 10-person household.
Age 18
b. ~1912
Female
Daughter
Born: Washington
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Snohomish, Washington |
| Surname | Armstrong |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Iowa |
| Mother's Birthplace | North Dakota |
| Additional Details | |
| Occupation | Waitress |
| Industry | Helper |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Waitress |
| Township / Ward | Oso Precinct |
| 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.
10 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| F Armstrong | Daughter | — | 12 | ~1918 |
| Ruby Armstrong | Daughter | — | 1 | ~1929 |
| Eunice Armstrong | Daughter | — | 20 | ~1910 |
| Gertrude Armstrong | Daughter | — | 16 | ~1914 |
| Mary Armstrong | Daughter | — | 18 | ~1912 |
| Edward Armstrong | Head | — | 51 | ~1879 |
| James Armstrong | Son | — | 4 | ~1926 |
| Levi Armstrong | Son | — | 9 | ~1921 |
| Albert Armstrong | Son | — | 14 | ~1916 |
| Frances Armstrong | Spouse | — | 42 | ~1888 |
Census Appearances
1920
Snohomish, Washington
Daughter, age 8
Snohomish, Washington · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Armstrong |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Iowa |
| Mother's Birthplace | North Dakota |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1930
Snohomish, Washington
Daughter, age 18
Snohomish, Washington · implied b. ~1912 — 10 household members
| Surname | Armstrong |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Iowa |
| Mother's Birthplace | North Dakota |
| Occupation | Waitress |
| Industry | Helper |
| Class of Worker | W |
| Can Read/Write | Yes |
| 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 Armstrong across 2 US Census years (1920 and 1930) in Snohomish, Washington, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Armstrong
Daughter · 1930 · age 18 · b. ~1912 · Washington
★ You are viewing this record
Sibling
Eunice Armstrong
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
F Armstrong
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Armstrong
Sibling · 1930 · age 4
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Levi Armstrong
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Armstrong
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ruby Armstrong
Sibling · 1930 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Albert Armstrong
Sibling · 1930 · age 14
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
1930 US Federal Census — Snohomish, Washington
Open full size
1930 US Federal Census — Snohomish, Washington
Page Contents
50 people indexed on this census page (ia:1930:15thcensus2520unit:0164)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Edward Armstrong | 51 | Head | Laborer | Iowa |
| 2 | Frances C Armstrong | 42 | Wife | — | North Dakota |
| 3 | Eunice P Armstrong | 20 | Daughter | Waitress | Washington |
| 4 | Mary E Armstrong THIS PERSON | 18 | Daughter | Waitress | Washington |
| 5 | Gertrude N Armstrong | 16 | Daughter | — | Washington |
| 6 | Albert L Armstrong | 14 | Son | — | Washington |
| 7 | F Mae Armstrong | 12 | Daughter | — | Washington |
| 8 | Levi W Armstrong | 9 | Son | — | Washington |
| 9 | James E Armstrong | 4 | Son | — | Washington |
| 10 | Ruby B Armstrong | 1 | Daughter | — | Washington |
| 11 | Herbert L Van Horn | 47 | Head | Carpenter | Iowa |
| 12 | Clara B Van Horn | 45 | Wife | — | New York |
| 13 | Donald Van Horn | 23 | Son | Garage Man | Iowa |
| 14 | Dwight Van Horn | 17 | Son | Helper | Washington |
| 15 | Angeline Van Horn | 15 | Daughter | — | Washington |
| 16 | Raymond Van Horn | 9 | Son | — | Washington |
| 17 | Violet Van Horn | 6 | Daughter | — | Washington |
| 18 | Herman Dornfari | 57 | Head | Shooting | Germany |
| 19 | Halley H Marshall | 53 | Head | Mailman | Arkansas |
| 20 | Lucy S Marshall | 44 | Wife | — | Missouri |
| 21 | John B Marshall | 18 | Son | — | Washington |
| 22 | Robert D Marshall | 13 | Son | — | Washington |
| 23 | Philis Marshall | 9 | Daughter | — | Washington |
| 24 | Lawrence E Fry | 32 | Head | Farmer | Washington |
| 25 | Naomi E Fry | 22 | Wife | — | Iowa |
| 26 | H Betty Fry | 3 | Daughter | — | Washington |
| 27 | Elmer L Fry | 2 | Son | — | Washington |
| 28 | Bernilda Fry | 0 | Daughter | — | Washington |
| 29 | Enoch Johnson | 63 | Lodger | Helper | Sweden |
| 30 | Enoch Varpus | 46 | Head | Farmer | England |
| 31 | Hannah Varpus | 46 | Wife | — | England |
| 32 | John Varpus | 25 | Son | Farmer | England |
| 33 | John Maeth | 47 | Head | Laborer | Germany |
| 34 | David C George | 38 | Head | Laborer | Illinois |
| 35 | Nellie George | 29 | Wife | — | Washington |
| 36 | Gladys George | 10 | Daughter | — | Washington |
| 37 | Thed Hamm | 19 | Step-son | Student | Washington |
| 38 | Edna Hamm | 17 | Step-daughter | Student | Washington |
| 39 | Frank D Claus | 35 | Head | Engineer | Wisconsin |
| 40 | Mae Claus | 32 | Wife | — | North Dakota |
| 41 | Vivian Claus | 12 | Daughter | — | Wyoming |
| 42 | Champ Claus | 10 | Son | — | Minnesota |
| 43 | Andrew Hartl | 49 | Head | Farmer | Germany |
| 44 | Carl Hartl | 19 | Son | Laborer | Washington |
| 45 | Rudolph Hartl | 11 | Son | — | Washington |
| 46 | George Blair | 54 | Head | Laborer | Wisconsin |
| 47 | Alma Blair | 49 | Wife | — | Wisconsin |
| 48 | Barbara Blair | 17 | Daughter | — | Montana |
| 49 | George Blair | 12 | Son | — | Montana |
| 50 | Edward Davis | 70 | Head | Farmer | Wales |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)