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John Koch — 1920 US Census Record
Linked across censuses1920 United States Federal Census · St Clair, Illinois
Our Model Tree links this John Koch across the 1910 and 1920 US Censuses in St Clair, Illinois (XGBoost, ~Confirmed) — first a son (b.~1899), then head of a 7-person household.
Age 21
b. ~1899
Male
Son
Born: Illinois
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | St Clair, Illinois |
| Surname | Koch |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Township / Ward | New Athens 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.
7 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Elizabeth Burchard | Other | — | 7 | ~1913 |
| John Koch | Head | — | 56 | ~1864 |
| Augusta Koch | Spouse | — | 47 | ~1873 |
| Katie Koch | Daughter | — | 20 | ~1900 |
| Lucille Koch | Daughter | — | 5 | ~1915 |
| John Koch | Son | — | 21 | ~1899 |
| Henry Koch | Son | — | 11 | ~1909 |
Census Appearances
1910
St Clair, …
Son, age 10
St Clair, Illinois · implied b. ~1900 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Koch |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
St Clair, …
Son, age 21
St Clair, Illinois · implied b. ~1899 — 7 household members
| Surname | Koch |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | 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 John Koch across 2 US Census years (1910 and 1920) in St Clair, Illinois, using XGBoost record linkage.
Show:
This person
Anchor record
John Koch
Son · 1920 · age 21 · b. ~1899 · Illinois
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Sibling
Henry Koch
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katie Koch
Sibling · 1920 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Koch
Sibling · 1920 · age 5
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
1920 US Federal Census — St Clair, Illinois
Open full size
1920 US Federal Census — St Clair, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu405unit:0559)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | William L Weber | 36 | Head | Farming | Illinois |
| 52 | Dora Weber | 31 | Wife | — | Illinois |
| 53 | Lillian Weber | 9 | Son | — | Illinois |
| 54 | John Weber | 8 | Son | — | Illinois |
| 55 | Arthur Weber | 6 | Son | — | Illinois |
| 56 | Elmer Weber | 5 | Son | — | Illinois |
| 57 | Curt Weber | 2 | Son | — | Illinois |
| 58 | Clarence Weber | 0 | Son | — | Illinois |
| 59 | Sam Bleich | 31 | Head | Farming | Illinois |
| 60 | Amanda Bleich | 28 | Wife | — | Illinois |
| 61 | Earl Bleich | 5 | Son | — | Illinois |
| 62 | John Koch | 56 | Head | Farming | Illinois |
| 63 | Augusta Koch | 47 | Wife | — | Illinois |
| 64 | John Koch THIS PERSON | 21 | Son | — | Illinois |
| 65 | Katie Koch | 20 | Daughter | — | Illinois |
| 66 | Henry Koch | 11 | Son | — | Illinois |
| 67 | Lucille Koch | 5 | Daughter | — | Illinois |
| 68 | Elizabeth Burchard | 7 | Niece | — | Illinois |
| 69 | Lawrence Duttenlow | 71 | Head | — | Illinois |
| 70 | Peter Grau | 60 | Head | Farming | Germany |
| 71 | Mary Grau | 56 | Wife | — | Illinois |
| 72 | Nicholas Grau | 31 | Son | — | Illinois |
| 73 | Lizzie Grau | 21 | Daughter | — | Illinois |
| 74 | Henry Grau | 26 | Son | — | Illinois |
| 75 | Bertha Grau | 18 | Daughter | — | Illinois |
| 76 | Elizabeth Grau | 78 | Mother | — | Germany |
| 77 | Henry Schnebel | 72 | Head | Retired | Germany |
| 78 | Sophia Schnebel | 65 | Wife | — | Illinois |
| 79 | Annie Schnebel | 30 | Daughter | — | Illinois |
| 80 | Ralph Schnebel | 29 | Son | Farming | Illinois |
| 81 | Herman Schnebel | 22 | Son | Hired Hand | Illinois |
| 82 | Philip Heller | 88 | Boarder | — | Germany |
| 83 | George Miller | 59 | Head | Farming | Illinois |
| 84 | Carolina Miller | 56 | Wife | — | Illinois |
| 85 | Kate Miller | 26 | Daughter | — | Illinois |
| 86 | Edgar Miller | 21 | Son | — | Illinois |
| 87 | Elfrora Miller | 17 | Daughter | — | Illinois |
| 88 | Edna Miller | 14 | Daughter | — | Illinois |
| 89 | Head Nicholas | None | M | Farming | Germany |
| 90 | Elizabeth Haas | 52 | Wife | — | Germany |
| 91 | Peter Haas | 31 | Son | Farm Hand | Illinois |
| 92 | Katherine Haas | 24 | Daughter | — | Illinois |
| 93 | Frieda Haas | 18 | Daughter | — | Illinois |
| 94 | Reckina Haas | 15 | Daughter | — | Illinois |
| 95 | Amelia Haas | 11 | Daughter | — | Illinois |
| 96 | Martin Snider | 51 | Head | Farming | Illinois |
| 97 | Rose Snider | 44 | Wife | — | Illinois |
| 98 | Conrad Snider | 19 | Son | Farm Hand | Illinois |
| 99 | Elizabeth Snider | 17 | Daughter | — | Illinois |
| 100 | George Snider | 17 | Son | — | Illinois |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)