OJ
Olga Johnson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Nelson, North Dakota
Our Model Tree links this Olga Johnson across the 1910, 1920 and 1930 US Censuses in Nelson, North Dakota (XGBoost, ~Confirmed), with identified parents Ole & Anna — first a daughter (b.~1899), then head of a 6-person household.
Age 31
b. ~1899
Female
Daughter
Born: North Dakota
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Nelson, North Dakota |
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
| Township / Ward | Melvin Township |
| Est. Birth Year | ~1899 |
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.
6 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Olga | Age | Birth yr |
|---|---|---|---|---|
| Anna Johnson | Other | — | 54 | ~1876 |
| Harry Johnson | Son | — | 21 | ~1909 |
| Lida Johnson | Daughter | — | 39 | ~1891 |
| Olga Johnson | Daughter | — | 31 | ~1899 |
| Ole Johnson | Head | — | 69 | ~1861 |
| Mark Johnson | Son | — | 41 | ~1889 |
Census Appearances
1910
Nelson, North …
Daughter, age 11
Nelson, North Dakota · implied b. ~1899 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olaf A |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1920
Nelson, North …
Daughter, age 20
Nelson, North Dakota · implied b. ~1900 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
1930
Nelson, North …
Daughter, age 31
Nelson, North Dakota · implied b. ~1899 — 6 household members
| Surname | Johnson |
| Given Name | Olga |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | North Dakota |
| Father's Birthplace | Norway |
| Mother's Birthplace | Norway |
| Can Read/Write | Yes |
| Birth State | North Dakota |
| Birth Country | United States |
| Birthplace (normalized) | north dakota |
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 3 US Census years (1910, 1920 and 1930) in Nelson, North Dakota, using XGBoost record linkage. Identified parents: father Ole Johnson (~0.92 confidence) and mother Anna Johnson (~0.92 confidence) and mother Anna Johnson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Ole Johnson
b. ~1861
Source father
● Household
· direct · ~0.92
Mother
Anna Johnson
b. ~1862
Source mother
● Household
· direct · ~0.92
Mother
Anna Johnson
b. ~1863
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Olga Johnson
Daughter · 1930 · age 31 · b. ~1899 · North Dakota
★ You are viewing this record
Sibling
Lida Johnson
Sibling · 1930 · age 39
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harry Johnson
Sibling · 1930 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mark Johnson
Sibling · 1930 · age 41
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 — Nelson, North Dakota
Open full size
1930 US Federal Census — Nelson, North Dakota
Page Contents
50 people indexed on this census page (ia:1930:15thcensus1739unit:0970)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Hans Petersson | 51 | Head | Farming | Denmark |
| 52 | Marie Petersson | 50 | Wife-H | — | Denmark |
| 53 | Billy Petersson | 24 | Son | — | North Dakota |
| 54 | Ole Jr. Petersson | 21 | Son | — | North Dakota |
| 55 | Ole Petersson | 76 | Father | Retired | Denmark |
| 56 | Thyntes-Moble Petersson | 16 | Lodger | — | North Dakota |
| 57 | Shimaborger Petersson | 22 | Boarder | Teacher | Minnesota |
| 58 | Ole B. Johnson | 69 | Head | Farmer | Norway |
| 59 | Anna Johnson | 54 | Wife-H | — | Norway |
| 60 | Mark S. Johnson | 41 | Son | Farming | North Dakota |
| 61 | Lida Johnson | 39 | Daughter | — | North Dakota |
| 62 | Olga Johnson THIS PERSON | 31 | Daughter | — | North Dakota |
| 63 | Harry Johnson | 21 | Son | — | North Dakota |
| 64 | Ernest Fransen | 34 | Head | Farming | Sweden |
| 65 | Marie Fransen | 24 | Wife-H | — | North Dakota |
| 66 | Helmer Fransen | 7 | Son | — | North Dakota |
| 67 | John Fransen | 5 | Son | — | North Dakota |
| 68 | Kenneth Fransen | 3 | Son | — | North Dakota |
| 69 | Raymond Fransen | 1 | Son | — | North Dakota |
| 70 | Lewis Anderson | 67 | Head-H | Farming | Norway |
| 71 | Elmer Anderson | 47 | Son | Farming | Wisconsin |
| 72 | Albert Anderson | 40 | Son | Laborer | North Dakota |
| 73 | Willie Anderson | 36 | Son | Farming | North Dakota |
| 74 | Emma Anderson | 33 | Daughter | — | North Dakota |
| 75 | Floid Anderson | 17 | Grandson | Laborer | North Dakota |
| 76 | Lucille Porter | 21 | Boarder | Teacher | North Dakota |
| 77 | Iver Oravick | 61 | Head | Farming | Norway |
| 78 | Lena Oravick | 59 | Wife-H | — | Norway |
| 79 | Albert Oravick | 37 | Son | Laborer | North Dakota |
| 80 | Ole Lilleoien | 49 | Head | Farming | Norway |
| 81 | Mathilda Lilleoien | 43 | Wife | — | North Dakota |
| 82 | Clarice Lilleoien | 17 | Son | — | North Dakota |
| 83 | Bernice Lilleoien | 14 | Daughter | — | North Dakota |
| 84 | Oscar Lilleoien | 11 | Son | — | North Dakota |
| 85 | Ralph Lilleoien | 43 | Head | Farming | Norway |
| 86 | Clara Lilleoien | 31 | Wife-H | — | North Dakota |
| 87 | Iavern Smaag | 35 | Head | Farming | Norway |
| 88 | Inga Smaag | 32 | Wife | — | Norway |
| 89 | Bernice Smaag | 3 | Daughter | — | North Dakota |
| 90 | Eunice Smaag | 2 | Daughter | — | North Dakota |
| 91 | Selmer Smaag | 1 | Son | — | North Dakota |
| 92 | Bert Smaag | 0 | Son | — | North Dakota |
| 93 | W. J. Wilson | 49 | Boarder | Laborer | North Dakota |
| 94 | Nils Ophaug | 56 | Head | Farming | Norway |
| 95 | Mary Ophaug | 46 | Wife-H | — | Norway |
| 96 | Clarence Ophaug | 23 | Son | Laborer | North Dakota |
| 97 | George Ophaug | 21 | Son | Laborer | North Dakota |
| 98 | Oscar Ophaug | 18 | Son | — | North Dakota |
| 99 | Teddy Ophaug | 16 | Son | — | North Dakota |
| 100 | Nora Ophaug | 14 | Daughter | — | North Dakota |
Related Census Records
Pedigree Summary
Olga + 3 siblings
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)