OJ
Olga Johnson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Buena Vista, Iowa
Our Model Tree links this Olga Johnson across the 1920 and 1930 US Censuses in Buena Vista, Iowa (XGBoost, ~Confirmed) — first a daughter (b.~1918), then head of a 9-person household.
Age 12
b. ~1918
Female
Daughter
Born: Iowa
1930 Census Record Details
| Census Year | 1930 |
| Location | Buena Vista, Iowa |
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Marital Status | — |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Maple Valley Township |
| Est. Birth Year | ~1918 |
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.
9 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Olga | Age | Birth yr |
|---|---|---|---|---|
| Elda Johnson | Daughter | — | 14 | ~1916 |
| Elizabeth Johnson | Daughter | — | 18 | ~1912 |
| Lyla Johnson | Daughter | — | 2 | ~1928 |
| Ione Johnson | Daughter | — | 8 | ~1922 |
| Olga Johnson | Daughter | — | 12 | ~1918 |
| Ida Johnson | Spouse | — | 43 | ~1887 |
| Oscar Johnson | Head | — | 42 | ~1888 |
| Holger Johnson | Son | — | 16 | ~1914 |
| Harold Johnson | Son | — | 5 | ~1925 |
Census Appearances
1920
Buena Vista, …
Daughter, age 3
Buena Vista, Iowa · implied b. ~1917 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Buena Vista, …
Daughter, age 12
Buena Vista, Iowa · implied b. ~1918 — 9 household members
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 12 |
| Birthplace | Iowa |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Olga Johnson across 2 US Census years (1920 and 1930) in Buena Vista, Iowa, using XGBoost record linkage.
Show:
This person
Anchor record
Olga Johnson
Daughter · 1930 · age 12 · b. ~1918 · Iowa
★ You are viewing this record
Sibling
Elda Johnson
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Johnson
Sibling · 1930 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lyla Johnson
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Elizabeth Johnson
Sibling · 1930 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Holger Johnson
Sibling · 1930 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ione Johnson
Sibling · 1930 · age 8
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 — Buena Vista, Iowa
Open full size
1930 US Federal Census — Buena Vista, Iowa
Page Contents
50 people indexed on this census page (ia:1930:iowacensus00reel645:0146)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Jean Sauter | 9 | Son | — | Iowa |
| 52 | Mrystal Sauter | 7 | Daughter | — | Iowa |
| 53 | Jean Sauter | 5 | Son | — | Iowa |
| 54 | Robert Sauter | 4 | Son | — | Iowa |
| 55 | Evelyn Sauter | 2 | Daughter | — | Iowa |
| 56 | Earl Forgens | 46 | Head | Farmer | Maine |
| 57 | Eula Forgens | 46 | Wife | — | England |
| 58 | John Bruno | 39 | Head | Farmer | Illinois |
| 59 | Margaret Bruno | 32 | Wife | — | Scotland |
| 60 | Barbara Bruno | 12 | Daughter | — | Iowa |
| 61 | Eloyce Bruno | 8 | Son | — | Iowa |
| 62 | Orlean Bruno | 5 | Daughter | — | Iowa |
| 63 | Marion Chandler | 21 | Laborer | Laborer | Tennessee |
| 64 | Henry Bristow | 41 | Head | Farmer | Ohio |
| 65 | Iva Bristow | 40 | Wife | — | Iowa |
| 66 | Bernice Bristow | 14 | Daughter | — | Iowa |
| 67 | Henry Bristow | 11 | Son | — | Iowa |
| 68 | James Bristow | 9 | Son | — | Iowa |
| 69 | Marjorie Bristow | 7 | Daughter | — | Iowa |
| 70 | Donald Bristow | 4 | Son | — | Iowa |
| 71 | Alfred Cattong | 49 | Head | Mechanist | Germany |
| 72 | Anna Cattong | 45 | Wife | — | Illinois |
| 73 | Louisa Herstedt | 58 | Head | Farmer | Illinois |
| 74 | Edna Herstedt | 30 | Daughter | — | Iowa |
| 75 | Milton Herstedt | 25 | Son | Laborer | Iowa |
| 76 | Frank Hill | 30 | Head | Farmer | Iowa |
| 77 | Margaret Swanson | 24 | Housekeeper | Servant | Iowa |
| 78 | Lucella Swanson | 7 | Daughter | — | Iowa |
| 79 | Oscar Johnson | 42 | Head | Farmer | Sweden |
| 80 | Ida Johnson | 43 | Wife | — | Sweden |
| 81 | Elizabeth Johnson | 18 | Daughter | — | Iowa |
| 82 | Holger Johnson | 16 | Son | — | Iowa |
| 83 | Elda Johnson | 14 | Daughter | — | Iowa |
| 84 | Olga Johnson THIS PERSON | 12 | Daughter | — | Iowa |
| 85 | Ione Johnson | 8 | Daughter | — | Iowa |
| 86 | Harold Johnson | 5 | Son | — | Iowa |
| 87 | Lyla Johnson | 2 | Daughter | — | Iowa |
| 88 | Emil Grisim | 28 | Head | Farmer | Wisconsin |
| 89 | Maudie Grisim | 23 | Wife | — | Missouri |
| 90 | Emil W. Grisim | 2 | Son | — | Iowa |
| 91 | Elaine Grisim | 1 | Daughter | — | Iowa |
| 92 | Elmer A. Taylor | 34 | Head | Farmer | Illinois |
| 93 | Ethel O. Taylor | 33 | Wife | — | Iowa |
| 94 | James Trafford | 26 | Laborer | Laborer | Illinois |
| 95 | George Gaffle | 27 | Head | Farmer | Illinois |
| 96 | Mary Gaffle | 53 | Mother | — | Iowa |
| 97 | Sally Gaffle | 20 | Sister | — | Iowa |
| 98 | Enoch C. Molgaard | 44 | Head | Farmer | Denmark |
| 99 | Rose Molgaard | 45 | Wife | — | Denmark |
| 100 | Ted Molgaard | 14 | Son | — | Iowa |
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)