ON
Oscar Nelson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Sangamon, Illinois
Our Model Tree links this Oscar Nelson across the 1910, 1920 and 1930 US Censuses in Sangamon, Illinois (XGBoost, ~Confirmed), with identified parents Louis & Lena — first a son (b.~1911), then head of a 6-person household.
Age 19
b. ~1911
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Sangamon, Illinois |
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | Woodside Township Part Of |
| Est. Birth Year | ~1911 |
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 Oscar | Age | Birth yr |
|---|---|---|---|---|
| Mary Tomlinson | Daughter | — | 2 | ~1928 |
| Helen Nelson | Daughter | — | 21 | ~1909 |
| Louis Nelson | Head | — | 51 | ~1879 |
| Oscar Nelson | Son | — | 19 | ~1911 |
| Elmer Nelson | Son | — | 14 | ~1916 |
| Sena Nelson | Spouse | — | 47 | ~1883 |
Census Appearances
1910
Sangamon, Illinois
Son, age 1
Sangamon, Illinois · implied b. ~1909 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Illinois |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Sangamon, Illinois
Son, age 10
Sangamon, Illinois · implied b. ~1910 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Sangamon, Illinois
Son, age 19
Sangamon, Illinois · implied b. ~1911 — 6 household members
| Surname | Nelson |
| Given Name | Oscar |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Oscar Nelson across 3 US Census years (1910, 1920 and 1930) in Sangamon, Illinois, using XGBoost record linkage. Identified parents: father Louis Nelson (~0.92 confidence) and mother Lena Nelson (~0.92 confidence) and mother Sena Nelson (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Louis Nelson
b. ~1879
Source father
● Household
· direct · ~0.92
Mother
Lena Nelson
b. ~1883
Source mother
● Household
· direct · ~0.92
Mother
Sena Nelson
b. ~1884
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Oscar Nelson
Son · 1930 · age 19 · b. ~1911 · Illinois
★ You are viewing this record
Sibling
Elmer Nelson
Sibling · 1930 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Tomlinson
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Nelson
Sibling · 1930 · age 21
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 — Sangamon, Illinois
Open full size
1930 US Federal Census — Sangamon, Illinois
Page Contents
50 people indexed on this census page (ia:1930:illinoiscensus00reel560:0240)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Dorothy | 18 | Daughter | — | Illinois |
| 52 | John | 21 | Lodger | Laborer | Illinois |
| 53 | Isadore Frank | 35 | Head | Advertising | Missouri |
| 54 | Mabel J. Frank | 31 | Wife | Stenographer | Illinois |
| 55 | Loraine Frank | 10 | Daughter | — | Illinois |
| 56 | Frank Roberts | 39 | Head | Manager | Illinois |
| 57 | Charlotte Roberts | 37 | Wife | — | Illinois |
| 58 | Frank O. Roberts | 13 | Son | — | Illinois |
| 59 | Charlotte A. Roberts | 7 | Daughter | — | Illinois |
| 60 | Albert Reisch | 49 | Head | Proprietor | Illinois |
| 61 | Caroline Reisch | 52 | Wife | — | Germany |
| 62 | Clara Hofferman | 45 | Sister in law | — | Illinois |
| 63 | Charles L. Bohlen | 52 | Head | Sec Treasurer | Illinois |
| 64 | Monna Bohlen | 52 | Wife | — | Norway |
| 65 | Catherine L. Bohlen | 15 | Son | — | Illinois |
| 66 | Charles L. Jr. Bohlen | 11 | Son | — | Illinois |
| 67 | Ingeborg Tostenson | 76 | Mother in law | — | Norway |
| 68 | John Irving | 48 | Head | Farmer | Illinois |
| 69 | Mary Irving | 40 | Wife | — | Pennsylvania |
| 70 | Elizabeth Irving | 19 | Daughter | — | Illinois |
| 71 | Louise Irving | 17 | Daughter | — | Illinois |
| 72 | Hughes Irving | 16 | Son | — | Illinois |
| 73 | Mary Irving | 14 | Daughter | — | Illinois |
| 74 | Dorothy L. Irving | 12 | Daughter | — | Illinois |
| 75 | John Jr. Irving | 11 | Son | — | Illinois |
| 76 | Bennett H. Rogers | 33 | Head | Dairyman | Illinois |
| 77 | Ina L. Rogers | 30 | Wife | Cutter | Illinois |
| 78 | Gwendolen Lowery | 14 | Sister in law | — | Illinois |
| 79 | Harold K. Davis | 25 | Head | Gas Fitter | Illinois |
| 80 | Ruth F. Davis | 24 | Wife | — | Illinois |
| 81 | Shirley L. Davis | 4 | Daughter | — | Illinois |
| 82 | Wanda M. Davis | 3 | Daughter | — | Illinois |
| 83 | Harold K. Jr. Davis | 0 | Son | — | Illinois |
| 84 | Louis Nelson | 51 | Head | Carpenter | Sweden |
| 85 | Sena Nelson | 47 | Wife | — | Sweden |
| 86 | Helen K. Nelson | 21 | Daughter | Stenographer | Illinois |
| 87 | Oscar Nelson THIS PERSON | 19 | Son | — | Illinois |
| 88 | Elmer Louis Nelson | 14 | Son | — | Illinois |
| 89 | Mary M. Tomlinson | 2 | Daughter | — | Illinois |
| 90 | — | None | — | — | — |
| 91 | — | None | — | — | — |
| 92 | — | None | — | — | — |
| 93 | — | None | — | — | — |
| 94 | — | None | — | — | — |
| 95 | — | None | — | — | — |
| 96 | — | None | — | — | — |
| 97 | — | None | — | — | — |
| 98 | — | None | — | — | — |
| 99 | — | None | — | — | — |
| 100 | — | None | — | — | — |
Pedigree Summary
Oscar + 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)