JK
John Koch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Colorado-County, Texas
Our Model Tree links this John Koch across the 1930 and 1940 US Censuses in Colorado-County, Texas (XGBoost, ~Confirmed) — first a head (b.~1905), then head of a 5-person household.
Age 35
b. ~1905
Male
Head
Born: Texas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Colorado-County, Texas |
| Surname | Koch |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | Justice Precinct #5 |
| 1935 Residence (County) | Colorado |
| Additional Details | |
| Occupation | laborer |
| Industry | WPA Road Project |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 170 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Occupation | Laborer |
| Township / Ward | Justice Precinct 5 |
| Est. Birth Year | ~1905 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Julia Koch | Spouse | — | 34 | ~1906 |
| Darris Koch | Daughter | — | 10 | ~1930 |
| John Koch | Head | — | 35 | ~1905 |
| Dorothy Koch | Daughter | — | 12 | ~1928 |
| Sam Koch | Son | — | 7 | ~1933 |
Census Appearances
1930
Colorado, Texas
Head, age 24
Colorado, Texas · implied b. ~1906 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Keck |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Texas |
| Age at First Marriage | 19 |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Occupation | Farmer |
| Industry | own farm |
| Class of Worker | VVVV |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Veteran | no |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Colorado-County, Texas
Head, age 35
Colorado-County, Texas · implied b. ~1905 — 5 household members
| Surname | Koch |
| Given Name | John |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 35 |
| Marital Status | Married |
| Birthplace | Texas |
| 1935 Residence (City) | Justice Precinct #5 |
| 1935 Residence (County) | Colorado |
| Occupation | laborer |
| Industry | WPA Road Project |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 170 |
| Highest Grade | No 5 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Koch
Head · 1940 · age 35 · b. ~1905 · Texas
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Colorado-County, Texas
Open full size
1940 US Federal Census — Colorado-County, Texas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04010-00592)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Lillie Elmo Lillie | 19 | son | Farm Hand | Texas |
| 2 | Earline Lillie | 15 | daughter | Farm Hand | Texas |
| 3 | Leroy Lillie | 11 | son | — | Texas |
| 4 | Edna Lillie | 8 | daughter | — | Texas |
| 5 | Elo Lillie | 27 | son | Farmer | Texas |
| 6 | Elvira Lillie | 24 | daughter-in-law | Farm Hand | Texas |
| 7 | Pearl Lillie | 3 | granddaughter | — | Texas |
| 8 | Albert Moeller | 27 | head | Farmer | Texas |
| 9 | Caroline Moeller | 24 | wife | — | Texas |
| 10 | Leo Richter | 37 | head | Farmer | Texas |
| 11 | Millie Richter | 34 | wife | — | Texas |
| 12 | Frank L. Havel | 60 | head | Farmer | Texas |
| 13 | Lena Havel | 47 | wife | — | Texas |
| 14 | Jerome Havel | 21 | son | Farm Hand | Texas |
| 15 | Justina Havel | 17 | daughter | Farm Hand | Texas |
| 16 | Alister Havel | 4 | son | — | Texas |
| 17 | Brigeta Kneblik | 25 | daughter-step | Farm Hand | Texas |
| 18 | Nickola Kneblik | 23 | son-step | Farm Hand | Texas |
| 19 | Emil Evansky | 35 | head | Farmer | Texas |
| 20 | Rosie Evansky | 26 | wife | — | Texas |
| 21 | Dorothy Mae Evansky | 6 | daughter | — | Texas |
| 22 | Mary Ann Evansky | 4 | daughter | — | Texas |
| 23 | John Horka | 77 | father-in-law | — | Czechoslovakia |
| 24 | Emilie Horka | 32 | sister-in-law | — | Texas |
| 25 | Eugene Lesikar | 19 | hired man | Farm Hand | Texas |
| 26 | Peter Evanecky | 37 | head | Farmer | Texas |
| 27 | Ella Evanecky | 22 | wife | — | Texas |
| 28 | George Hilgen | 57 | head | Farmer | Texas |
| 29 | Agnes Hilgen | 56 | wife | — | Germany |
| 30 | Otto Hilgen | 23 | son | Farm Hand | Texas |
| 31 | Fred Hilgen | 55 | brother | — | Texas |
| 32 | Frank Buskamp | 21 | head | Farmer | Texas |
| 33 | Lillie Buskamp | 23 | wife | — | Texas |
| 34 | Frankie Lee Buskamp | 2 | son | — | Texas |
| 35 | Kattie Buskamp | 66 | mother | — | Texas |
| 36 | John Koch THIS PERSON | 35 | head | Laborer | Texas |
| 37 | Julia Koch | 34 | wife | — | Texas |
| 38 | Dorothy Mae Koch | 12 | daughter | — | Texas |
| 39 | Darris Koch | 10 | daughter | — | Texas |
| 40 | Sam Koch | 7 | son | — | Texas |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)