JL
John Lynch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Chickasaw-County, Iowa
Our Model Tree links this John Lynch across the 1920, 1930 and 1940 US Censuses in Chickasaw-County, Iowa (XGBoost, ~Confirmed), with identified parents John & John — first a head (b.~1916), then head of a 5-person household.
Age 24
b. ~1916
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Chickasaw-County, Iowa |
| Surname | Lynch |
| Given Name | John Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Chickasaw |
| Additional Details | |
| Occupation | Farmer |
| Industry | own farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Farmer |
| Township / Ward | Utica Twp |
| Est. Birth Year | ~1916 |
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 |
|---|---|---|---|---|
| Mary Lynch | Daughter | — | ~1940 | |
| Geraldine Lynch | Daughter | — | 1 | ~1939 |
| John Lynch | Head | — | 24 | ~1916 |
| Leo Dotzler | Other | — | 21 | ~1919 |
| Eleanor Lynch | Spouse | — | 24 | ~1916 |
Census Appearances
1920
Chickasaw, Iowa
Son, age 3
Chickasaw, Iowa · implied b. ~1917 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Chickasaw, Iowa
Son, age 14
Chickasaw, Iowa · implied b. ~1916 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | John |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 14 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Chickasaw-County, Iowa
Head, age 24
Chickasaw-County, Iowa · implied b. ~1916 — 5 household members
| Surname | Lynch |
| Given Name | John Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 24 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Chickasaw |
| Occupation | Farmer |
| Industry | own farm |
| Class of Worker | OA |
| Hours Worked | 70 |
| Income (1939) | 0 |
| Highest Grade | Hs 2 |
| 1935 Residence | Iowa |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Lynch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father John Lynch (~0.92 confidence) and father John Lynch (~0.92 confidence) and mother Grace Lynch (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Lynch
b. ~1882
Source father
● Household
· direct · ~0.92
Father
John Lynch
b. ~1890
Source father
● Household
· direct · ~0.92
Mother
Grace Lynch
b. ~1892
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Lynch
Head · 1940 · age 24 · b. ~1916 · Iowa
★ 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 — Chickasaw-County, Iowa
Open full size
1940 US Federal Census — Chickasaw-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01147-00963)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Andrew J. Hensing | 67 | Head | Farmer | Iowa |
| 2 | Maude Hensing | 43 | Wife | House Keeper | Iowa |
| 3 | Anna Mary Hensing | 18 | Daughter | — | Iowa |
| 4 | Coletta Margaret Hensing | 16 | Daughter | — | Iowa |
| 5 | Jo Ann Ellen Hensing | 12 | Daughter | — | Iowa |
| 6 | Joseph James Hensing | 4 | Son | — | Iowa |
| 7 | John Joseph Lynch THIS PERSON | 24 | Head | Farmer | Iowa |
| 8 | Eleanor Rose Lynch | 24 | Wife | Housewife | Iowa |
| 9 | Geraldine Lynch | 1 | Daughter | — | Iowa |
| 10 | Mary Helen Lynch | 0 | Daughter | — | Iowa |
| 11 | Leo Dotzler | 21 | Hired man | Farm Laborer | Iowa |
| 12 | Stanley A. Jirak | 45 | Head | Farmer | Iowa |
| 13 | Amy Jane Jirak | 29 | Wife | House Wife | Iowa |
| 14 | Velda Marlene Jirak | 5 | Daughter | — | Iowa |
| 15 | Donald Stanley Jirak | 3 | Son | — | Iowa |
| 16 | Ernest Steadman | 46 | Hired man | Farm Laborer | Iowa |
| 17 | John P. Koudelka | 62 | Head | Farmer | Iowa |
| 18 | Frances Anne Koudelka | 54 | Wife | House Wife | Iowa |
| 19 | Arlene Frances Koudelka | 19 | Daughter | — | Iowa |
| 20 | Robert T. Basta | 37 | Head | Farmer | Iowa |
| 21 | Helen Marie Basta | 31 | Wife | House Wife | Iowa |
| 22 | Donald Charles Basta | 11 | Son | — | Iowa |
| 23 | Patricia Ann Basta | 8 | Daughter | — | Iowa |
| 24 | Dorothy Ann Basta | 2 | Daughter | — | Iowa |
| 25 | Frank W. Kacher | 57 | Head | Farmer | Iowa |
| 26 | Adeline T. Kacher | 52 | Wife | House Wife | Iowa |
| 27 | Devere James Kacher | 13 | Son | — | Iowa |
| 28 | Dennis Francis Kacher | 10 | Son | — | Iowa |
| 29 | Lucy Dostal | 38 | Head | House Wife | Iowa |
| 30 | Stanley Dostal | 19 | Son | — | Iowa |
| 31 | Lucille Dostal | 18 | Daughter | — | Iowa |
| 32 | Joseph Dostal | 16 | Son | — | Iowa |
| 33 | Wesley A.B. Dostal | 14 | Son | — | Iowa |
| 34 | Francis Dostal | 10 | Son | — | Iowa |
| 35 | Louis Dostal | 8 | Son | — | Iowa |
| 36 | John Novotny | 60 | Head | Farmer | Iowa |
| 37 | Nellie Novotny | 52 | Wife | House Wife | Iowa |
| 38 | Josephine Dostal | 58 | Head | House Keeper | Bohemia |
| 39 | Leo Birst | 30 | Head | Farmer | Iowa |
| 40 | Florence Birst | 35 | Wife | House Wife | Iowa |
Pedigree Summary
John
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 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)