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John Olsen — 1930 US Census Record
Model Tree available1930 United States Federal Census · King, Washington
Our Model Tree links this John Olsen across the 1920, 1930 and 1940 US Censuses in King, Washington (XGBoost, ~Confirmed), with identified parents John & Sefus — first a head (b.~1905), then head of a 3-person household.
Age 25
b. ~1905
Male
Head
Born: Washington
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | King, Washington |
| Surname | Olsen |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Washington |
| Age at First Marriage | 21 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Additional Details | |
| Occupation | Steel worker |
| Industry | Steel mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2400 |
| Radio Set | R |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
| Occupation | Steel Worker |
| Township / Ward | Seattle City |
| Est. Birth Year | ~1905 |
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.
3 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Barbara Olsen | Daughter | — | 1 | ~1929 |
| John Olsen | Head | — | 25 | ~1905 |
| Evelyn Olsen | Spouse | — | 23 | ~1907 |
Census Appearances
1920
King, Washington
Son, age 15
King, Washington · implied b. ~1905 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | John A. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Washington |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Ireland |
| 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
Head, age 25
King, Washington · implied b. ~1905 — 3 household members
| Surname | Olsen |
| Given Name | John H |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Washington |
| Age at First Marriage | 21 |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Occupation | Steel worker |
| Industry | Steel mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2400 |
| Radio Set | R |
| Birth State | Washington |
| Birth Country | United States |
| Birthplace (normalized) | washington |
1940
King-County, Washington
Son, age 35
King-County, Washington · implied b. ~1905 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Olsen |
| Given Name | John N. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Single |
| Birthplace | Washington |
| 1935 Residence (City) | Seattle City |
| 1935 Residence (County) | King |
| Occupation | Fireman |
| Industry | City Fire Department |
| Class of Worker | GW |
| Hours Worked | 44 |
| Income (1939) | 2160 |
| Highest Grade | H-4 |
| 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 John Olsen across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Olsen (~0.92 confidence) and father Sefus Olsen (~0.92 confidence) and mother Lizzie Olsen (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Olsen
b. ~1862
Source father
● Household
· direct · ~0.92
Father
Sefus Olsen
b. ~1878
Source father
● Household
· direct · ~0.92
Mother
Lizzie Olsen
b. ~1860
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Olsen
Head · 1930 · age 25 · b. ~1905 · Washington
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — King, Washington
Open full size
1930 US Federal Census — King, Washington
Page Contents
39 people indexed on this census page (ia:1930:15thcensus2494unit:0639)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | John H Olsen THIS PERSON | 25 | Head | Steel Worker | Washington |
| 2 | Evelyn Olsen | 23 | Wife | — | Washington |
| 3 | Barbara Olsen | 1 | Daughter | — | Washington |
| 4 | Atlantic E Briggs | 61 | Head | Painter | Michigan |
| 5 | Fannie C Atherton | 67 | Boarder | — | Indiana |
| 6 | George H Webb | 32 | Head | Carpenter | Massachusetts |
| 7 | Edith C Webb | 61 | Wife | — | Illinois |
| 8 | Clifford A Cleary | 43 | Head | Driver | Michigan |
| 9 | Gertrude Cleary | 34 | Wife | — | Montana |
| 10 | Robert C Cleary | 2 | Son | — | Washington |
| 11 | Frank E Palmer | 64 | Uncle | Cook | Michigan |
| 12 | Fred C Palmer | 62 | Father-in-law | Stationary Engineer | Indiana |
| 13 | George Forrest | 36 | Head | Electrician | Washington |
| 14 | Mabel H Forrest | 34 | Wife | — | Colorado |
| 15 | William J Forrest | 9 | Son | — | Washington |
| 16 | Irma L Forrest | 7 | Daughter | — | Washington |
| 17 | Gregory G Manning | 33 | Head | Pressman | Ohio |
| 18 | Gladys G Manning | 33 | Wife | — | Michigan |
| 19 | Robert G Manning | 3 | Son | — | Washington |
| 20 | Robert E Carter | 20 | Brother-in-law | Driver | Washington |
| 21 | William W Carter | 19 | Brother-in-law | Order Clerk | Washington |
| 22 | Albert J Johansson | 39 | Head | Packer | Michigan |
| 23 | Claudia P Johansson | 47 | Wife | Shaker | West Virginia |
| 24 | Bernadette Calder | 24 | Step-daughter | Nurse | Ohio |
| 25 | Almeta Calder | 24 | Step-daughter | Office Work | Washington |
| 26 | Axel J Mathiesen | 41 | Head | Superintendent | Norway |
| 27 | Lena Mathiesen | 22 | Wife | — | Nevada |
| 28 | John J J Mathiesen | 1 | Son | — | Washington |
| 29 | John Johnson | 42 | Head | Manager | Minnesota |
| 30 | Viola C Johnson | 38 | Wife | — | Pennsylvania |
| 31 | Elwood F Johnson | 14 | Son | Helper | Washington |
| 32 | Doris L Johnson | 12 | Daughter | — | Washington |
| 33 | Phyllis M Johnson | 5 | Daughter | — | Washington |
| 34 | Robert M Johnson | 3 | Son | — | Washington |
| 35 | Charles Broscoe | 41 | Head | Trunk Maker | Illinois |
| 36 | Eleanor Broscoe | 22 | Wife | — | Sweden |
| 37 | Vernon Boughton | 39 | Head | Driver | South Dakota |
| 38 | Lucile Boughton | 38 | Wife | Asst. Manager | North Dakota |
| 39 | Bill Boughton | 8 | Son | — | Washington |
Pedigree Summary
John
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 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)