EJ
Elmer Johnson — 1930 US Census Record
Model Tree available1930 United States Federal Census · Cook, Illinois
Our Model Tree links this Elmer Johnson across the 1910, 1920 and 1930 US Censuses in Cook, Illinois (XGBoost, ~Confirmed), with identified parents Gust & Ada — first a son (b.~1904), then head of a 4-person household.
Age 26
b. ~1904
Male
Son
Born: Illinois
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Cook, Illinois |
| Surname | Johnson |
| Given Name | Elmer |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Occupation | Mechanic |
| Industry | Garage |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Mechanic |
| Township / Ward | Chicago City |
| Est. Birth Year | ~1904 |
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 Elmer | Age | Birth yr |
|---|---|---|---|---|
| Alfred Johnson | Head | — | 66 | ~1864 |
| Ernest Johnson | Son | — | 30 | ~1900 |
| Elmer Johnson | Son | — | 26 | ~1904 |
| Amelia Johnson | Spouse | — | 63 | ~1867 |
Census Appearances
1910
Cook, Illinois
Other, age 5
Cook, Illinois · implied b. ~1905 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Elmer |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
Cook, Illinois
Son, age 15
Cook, Illinois · implied b. ~1905 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Johnson |
| Given Name | Elmer |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Office Work |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Cook, Illinois
Son, age 26
Cook, Illinois · implied b. ~1904 — 4 household members
| Surname | Johnson |
| Given Name | Elmer |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Mechanic |
| Industry | Garage |
| Class of Worker | W |
| 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 Elmer Johnson across 3 US Census years (1910, 1920 and 1930) in Cook, Illinois, using XGBoost record linkage. Identified parents: father Gust Johnson (~0.92 confidence) and mother Ada Johnson (~0.92 confidence) and father Alfred Johnson (~0.92 confidence) and mother Amelia Johnson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Gust Johnson
b. ~1856
Source father
● Household
· direct · ~0.92
Mother
Ada Johnson
b. ~1863
Source mother
● Household
· direct · ~0.92
Father
Alfred Johnson
b. ~1864
Source father
● Household
· direct · ~0.92
Mother
Amelia Johnson
b. ~1867
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Elmer Johnson
Son · 1930 · age 26 · b. ~1904 · Illinois
★ You are viewing this record
Sibling
Ernest Johnson
Sibling · 1930 · age 30
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 — Cook, Illinois
Open full size
1930 US Federal Census — Cook, Illinois
Page Contents
48 people indexed on this census page (ia:1930:illinoiscensus00reel471rs:0361)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Bertha Hackbarth | 52 | Head | None | Illinois |
| 2 | Myrtle Hackbarth | 24 | Daughter | Clerk | Illinois |
| 3 | Beatrice Hackbarth | 23 | Daughter | Clerk | Illinois |
| 4 | Clark A. Ruth | 65 | Head | Lather | Maryland |
| 5 | Lulu Ruth | 58 | Wife | None | Indiana |
| 6 | John Ruth | 75 | Brother | None | Maryland |
| 7 | Charles Carlson | 71 | Roomer | None | Sweden |
| 8 | Henry Motzkus | 54 | Head | Engraver | New York |
| 9 | Elizabeth Motzkus | 53 | Wife | None | Ohio |
| 10 | Mark O. Lund | 68 | Head | Carpenter | Sweden |
| 11 | Arnold Lund | 24 | Son | Printer | Illinois |
| 12 | Gertrude Lund | 23 | Daughter-in-law | Steno | Wisconsin |
| 13 | William Johnson | 24 | Roomer | Fireman | Illinois |
| 14 | Wallis H. Johnson | 20 | Daughter | None | Illinois |
| 15 | Herman Venetto | 23 | Head | None | Illinois |
| 16 | Ruth Venetto | 22 | Wife | Clerk | Illinois |
| 17 | Georgine Venetto | 4 | Granddaughter | None | Illinois |
| 18 | Alfred Johnson | 66 | Head | Machinist | Sweden |
| 19 | Amelia Johnson | 63 | Wife | None | Sweden |
| 20 | Ernest Johnson | 30 | Son | Plumber | Illinois |
| 21 | Elmer Johnson THIS PERSON | 26 | Son | Mechanic | Illinois |
| 22 | Hilda Peterson | 65 | Head | None | Sweden |
| 23 | August Peterson | 80 | Husband | None | Sweden |
| 24 | Violet Peterson | 26 | Daughter | Operator | Illinois |
| 25 | Marie Brandt | 21 | Roomer | Book Sales | Sweden |
| 26 | Josephine Stone | 62 | Head | None | Norway |
| 27 | Clarence Brest | 39 | Son | Engraver | New York |
| 28 | Mable L. Brest | 32 | Daughter | None | Illinois |
| 29 | Charles J. Brest | 8 | Grandson | None | Illinois |
| 30 | Ernest Wendorf | 31 | Head | Machinist | Germany |
| 31 | Alfreda Wendorf | 25 | Wife | None | Germany |
| 32 | Willma Wendorf | 1 | Daughter | None | Illinois |
| 33 | Maurice Farber | 34 | Head | Clerk | Illinois |
| 34 | Inga Farber | 32 | Wife | None | Wisconsin |
| 35 | Milton Farber | 8 | Son | None | Illinois |
| 36 | Lee Vern Farber | 8 | Son | None | Illinois |
| 37 | Charles Farber | 6 | Son | None | Illinois |
| 38 | Elvera Brown | 23 | Roomer | Maid | Wisconsin |
| 39 | Belle Peterson | 63 | Head | None | Norway |
| 40 | William Robertson | 61 | Head | Blacksmith | Missouri |
| 41 | Alberta Robertson | 60 | Wife | None | Missouri |
| 42 | Howard Payne | 9 | Grandson | None | Illinois |
| 43 | Catherine Payne | 6 | Granddaughter | None | Illinois |
| 46 | Rudolph Johnson | 25 | Head | Bricklayer | Illinois |
| 47 | Violet Johnson | 21 | Wife | None | Illinois |
| 48 | Walter Johnson | 3 | Son | None | Illinois |
| 49 | Elvera Peterson | 20 | Sister-in-law | Stenographer | Illinois |
| 50 | Margaret Peterson | 58 | Mother-in-law | Operator | Illinois |
Pedigree Summary
Elmer + 1 sibling
Gen 1 · 4 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)