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August Johnson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Mendocino, California
Our Model Tree links this August Johnson across the 1920, 1930 and 1940 US Censuses in Mendocino, California (XGBoost, ~Confirmed) — first a head (b.~1870), then head of a 4-person household.
Age 60
b. ~1870
Male
Head
Born: Finland
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Mendocino, California |
| Surname | Johnson |
| Given Name | August |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1888 |
| Age at First Marriage | 34 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Additional Details | |
| Occupation | Carpenter |
| Industry | Bridges |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
| Occupation | Carpenter |
| Township / Ward | Fort Bragg City |
| Est. Birth Year | ~1870 |
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 1930 census.
| Name | Relation to head | Relative to August | Age | Birth yr |
|---|---|---|---|---|
| August Johnson | Head | — | 60 | ~1870 |
| Hilda Johnson | Other | — | 48 | ~1882 |
| Whisson Johnson | Son | — | 17 | ~1913 |
| Amir Johnson | Son | — | 14 | ~1916 |
Census Appearances
1920
Mendocino, California
Head, age 52
Mendocino, California · implied b. ~1868 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | August |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | Finland |
| Year of Immigration | 1888 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Teamster |
| Industry | Timberland |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth Country | Finland |
| Year of Naturalization | 1891 |
| Birthplace (normalized) | finland |
1930
Mendocino, California
Head, age 60
Mendocino, California · implied b. ~1870 — 4 household members
| Surname | Johnson |
| Given Name | August |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Finland |
| Naturalization Status | Naturalized |
| Year of Immigration | 1888 |
| Age at First Marriage | 34 |
| Father's Birthplace | Finland |
| Mother's Birthplace | Finland |
| Occupation | Carpenter |
| Industry | Bridges |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | Swedish |
| Birth Country | Finland |
| Birthplace (normalized) | finland |
1940
Mendocino-County, California
Other, age 70
Mendocino-County, California · implied b. ~1870 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | August |
| Relationship to Head | father |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | Finland |
| 1935 Residence (City) | Fort Bragg |
| 1935 Residence (County) | Mendocino |
| Naturalization Status | Naturalized |
| Occupation | laborer |
| Industry | bridge construction |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 1394 |
| Highest Grade | No 4 |
| 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 August Johnson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
August Johnson
Head · 1930 · age 60 · b. ~1870 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Mendocino, California
Open full size
1930 US Federal Census — Mendocino, California
Page Contents
50 people indexed on this census page (ia:1930:californiacensus00reel177:0954)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Elmer C Walker | 37 | Head | Fisherman | California |
| 2 | Ada Walker | 40 | Wife-H | — | California |
| 3 | Rhoda Walker | 13 | Step-dau | — | California |
| 4 | Agnes Van Leer | 10 | Step-dau | — | California |
| 5 | Bertha Thompson | 52 | Head | — | Finland |
| 6 | Annie Thompson | 24 | Son | Painter | California |
| 7 | Thelma Thompson | 15 | Daughter | — | California |
| 8 | Herman Saarijarvi | 61 | Head | Carpenter | Finland |
| 9 | Mary Saarijarvi | 60 | Wife-H | — | Finland |
| 10 | John Saarijarvi | 23 | Son | Fireman | California |
| 11 | Esther Saarijarvi | 19 | Daughter | — | California |
| 12 | Ida Niemi | 27 | Daughter | Saleslady | California |
| 13 | Gertrude Niemi | 8 | Granddaughter | — | California |
| 14 | Albert Eagle | 50 | Head | Laborer | England |
| 15 | Mary Eagle | 19 | Daughter | — | California |
| 16 | Dorothy Eagle | 12 | Daughter | — | California |
| 17 | Floyd Eagle | 22 | Son | Butcher | California |
| 18 | Erick Rannaniemi | 78 | Head | — | Finland |
| 19 | Maggie Rannaniemi | 75 | Wife-H | — | Finland |
| 20 | Miles Roni | 46 | Head | Baker | Finland |
| 21 | Signe Roni | 43 | Wife-H | — | Finland |
| 22 | Aili Roni | 18 | Daughter | — | Montana |
| 23 | Edmi Roni | 13 | Son | — | Montana |
| 24 | Oscar Roski | 49 | Head | Fisherman | Sweden |
| 25 | Annie Roski | 43 | Wife-H | — | Finland |
| 26 | Frank Roski | 17 | Son | Fisherman | California |
| 27 | William Roski | 15 | Son | — | California |
| 28 | Bernie Roski | 13 | Son | — | California |
| 29 | Annie Roski | 10 | Daughter | — | California |
| 30 | Pete Bonts | 69 | Head | Laborer | Switzerland |
| 31 | Margaret Bonts | 68 | Wife-H | — | Switzerland |
| 32 | Walter Bonts | 25 | Son | Rigger | California |
| 33 | Henry Bradley | 61 | Head | Carpenter | California |
| 34 | Louisa Bradley | 57 | Wife-H | — | Ohio |
| 35 | Willard Bradley | 18 | Son | Mechanic | California |
| 36 | Lois Bradley | 15 | Daughter | — | California |
| 37 | Margaret Bradley | 13 | Daughter | — | California |
| 38 | Lena Simpson | 39 | Head | — | Finland |
| 39 | Chester Simpson | 17 | Son | — | California |
| 40 | Frances Simpson | 14 | Daughter | — | California |
| 41 | Gladys Simpson | 13 | Daughter | — | California |
| 42 | Mary Simpson | 48 | Head-H | Laundress | California |
| 43 | Leo Simpson | 17 | Son | — | California |
| 44 | Francis Simpson | 14 | Son | — | California |
| 45 | Gertrude Gust | 68 | Head | — | California |
| 46 | Isaac Stov | 20 | Head | — | Finland |
| 47 | August Johnson THIS PERSON | 60 | Head | Carpenter | Finland |
| 48 | Hilda Johnson | 48 | Wife-H | — | Finland |
| 49 | Whisson Johnson | 17 | Son | Clerk | California |
| 50 | Amir Johnson | 14 | Son | — | California |
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)