ME
Mary Erickson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · King-County, Washington
Our Model Tree links this Mary Erickson across the 1920, 1930 and 1940 US Censuses in King-County, Washington (XGBoost, ~Confirmed) — first a spouse (b.~1891), then head of a 4-person household.
Age 49
b. ~1891
Female
Spouse
Born: Finland
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | King-County, Washington |
| Surname | Erickson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Athena Precinct |
| 1935 Residence (County) | King |
| Naturalization Status | Naturalized |
| Additional Details | |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Township / Ward | Athena Precinct |
| Est. Birth Year | ~1891 |
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 |
|---|---|---|---|---|
| James Erickson | Son | — | 14 | ~1926 |
| Arvid Erickson | Head | — | 55 | ~1885 |
| Mary Erickson | Spouse | — | 49 | ~1891 |
| Edith Erickson | Daughter | — | 21 | ~1919 |
Census Appearances
1920
King, Washington
Spouse, age 28
King, Washington · implied b. ~1892 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Erickson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 28 |
| Marital Status | Married |
| Birthplace | Finland |
| Year of Immigration | 1908 |
| Naturalization Status | First papers filed |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1930
King, Washington
Other, age 38
King, Washington · implied b. ~1892 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Erickson |
| Given Name | Mary |
| Relationship to Head | Wife-H |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Alien |
| Year of Immigration | 1908 |
| Age at First Marriage | 21 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
King-County, Washington
Spouse, age 49
King-County, Washington · implied b. ~1891 — 4 household members
| Surname | Erickson |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Finland |
| 1935 Residence (City) | Athena Precinct |
| 1935 Residence (County) | King |
| Naturalization Status | Naturalized |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
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 Erickson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Erickson
Spouse · 1940 · age 49 · b. ~1891 · Washington
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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
39 people indexed on this census page (nara:1940:m-t0627-04343-00114)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Faith L. Foster | 34 | Daughter | Sub. Teacher | Wisconsin |
| 2 | Dale L. Foster | 5 | Grandson | — | Washington |
| 3 | Mary L. Foster | 3 | Granddaughter | — | Washington |
| 4 | Rosina L. Parrott | 84 | Head | — | New York |
| 5 | Arvid Erickson | 55 | Head | Longshoreman | Finland |
| 6 | Mary Erickson THIS PERSON | 49 | Wife | — | Finland |
| 7 | Edith A. Erickson | 21 | Daughter | Office Clerk | Washington |
| 8 | James A. Erickson | 14 | Son | — | Washington |
| 9 | Harry R. Bates | 72 | Head | Deputy Organizer | Illinois |
| 10 | Vinnie R. Bates | 71 | Wife | — | Illinois |
| 11 | Catherine Johnson | 45 | Head | — | England |
| 12 | Marie Johnson | 12 | Daughter | — | Washington |
| 13 | Ernest G. Knapply | 48 | Head | Truck Driver | Oregon |
| 14 | Effie M. Knapply | 41 | Wife | — | Pennsylvania |
| 15 | Charles L. Knapply | 4 | Son | — | Washington |
| 16 | Peter Kelley | 60 | Head | Longshoreman | Pennsylvania |
| 17 | Mary J. Kelley | 60 | Housekeeper | Housekeeper | Washington |
| 18 | Lillian D. Stein | 54 | Head | — | Wisconsin |
| 19 | Holger B. Nielsen | 40 | Head | Partner Manager | Denmark |
| 20 | Ella Nielsen | 37 | Wife | — | Denmark |
| 21 | Mary G. Nielsen | 18 | Daughter | Wrapper | Montana |
| 22 | Ella S. Nielsen | 7 | Daughter | — | Washington |
| 23 | Karen G. Nielsen | 5 | Daughter | — | Washington |
| 24 | Henry G. Amberg | 48 | Head | Carpenter | Minnesota |
| 25 | Olga A. Amberg | 33 | Wife | — | Minnesota |
| 26 | Susan A. Williams | 66 | Head | — | Minnesota |
| 27 | James J. Williams | 38 | Son | Laborer | Idaho |
| 28 | Mary G. Broadwell | 11 | Granddaughter | — | California |
| 29 | Everard L. Brown | 42 | Head | Bill Poster | California |
| 30 | Daisy R. Brown | 37 | Wife | — | Minnesota |
| 31 | Edward G. Knight | 41 | Head | Receiving Clerk | New York |
| 32 | Lora B. Knight | 40 | Wife | — | Missouri |
| 33 | Everett A. Hallock | 46 | Head | Jump Roller | Illinois |
| 34 | William H. Thayer | 63 | Head | Sta. Eng. | Maine |
| 35 | Allan M. Thayer | 20 | Son | Service Sta. Att. | Washington |
| 36 | Malcolm P. Thayer | 15 | Son | — | Washington |
| 37 | Jessie R. Williams | 65 | Housekeeper | Housekeeper | Pennsylvania |
| 38 | George Hurst | 65 | Head | Laborer | Canada-Eng |
| 39 | Lucy Hurst | 52 | Wife | — | England |
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)