JL
John Lynch — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this John Lynch across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Martin & Martin — first a head (b.~1910), then head of a 5-person household.
Age 30
b. ~1910
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Lynch |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Bill clerk |
| Industry | Freight line |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 780 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Bill Clerk |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1910 |
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 |
|---|---|---|---|---|
| Barbara Lynch | Daughter | — | 6 | ~1934 |
| John Lynch | Head | — | 30 | ~1910 |
| Robert Dietrich | Other | — | 59 | ~1881 |
| Robert Lynch | Son | — | 2 | ~1938 |
| Mildred Lynch | Spouse | — | 26 | ~1914 |
Census Appearances
1920
Marion, Indiana
Son, age 10
Marion, Indiana · implied b. ~1910 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 20
Marion, Indiana · implied b. ~1910 — 10 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Book Keeper |
| Industry | Telegraph |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Head, age 30
Marion-County, Indiana · implied b. ~1910 — 5 household members
| Surname | Lynch |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Bill clerk |
| Industry | Freight line |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 780 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Martin Lynch (~0.92 confidence) and father Martin Lynch (~0.92 confidence) and mother Ella Lynch (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Martin Lynch
b. ~1883
Source father
● Household
· direct · ~0.92
Father
Martin Lynch
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Ella Lynch
b. ~1881
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Lynch
Head · 1940 · age 30 · b. ~1910 · Indiana
★ 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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01128-00147)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Grace Kraft | 31 | Wife | — | Indiana |
| 2 | Rosemary Kraft | 3 | Daughter | — | Indiana |
| 3 | Linda Kraft | 1 | Daughter | — | Indiana |
| 4 | Charles Cummins | 35 | Head | Milk Salesman | Indiana |
| 5 | Anna Cummins | 34 | Wife | — | Kentucky |
| 6 | Phyllis A. Cummins | 9 | Daughter | — | Indiana |
| 7 | Patricia L. Cummins | 8 | Daughter | — | Indiana |
| 8 | John Hoefer | 77 | Head | — | Indiana |
| 9 | Carrie Hoefer | 75 | Sister | — | Indiana |
| 10 | Minnie Gordon | 72 | Sister | — | Indiana |
| 11 | Joseph Moore | 22 | Head | Machine Operator | Illinois |
| 12 | Margaret Moore | 20 | Wife | — | Indiana |
| 13 | — | None | — | — | — |
| 14 | John Lynch THIS PERSON | 30 | Head | Bill Clerk | Indiana |
| 15 | Mildred Lynch | 26 | Wife | — | Indiana |
| 16 | Barbara Lynch | 6 | Daughter | — | Indiana |
| 17 | Robert Lynch | 2 | Son | — | Indiana |
| 18 | Robert Dietrich | 59 | Father-in-law | Watchman | Indiana |
| 19 | Theodore H. Lynch | 44 | Head | Switchman | Indiana |
| 20 | Lillian Lynch | 40 | Wife | — | Indiana |
| 21 | Norma Jean Lynch | 15 | Daughter | — | Indiana |
| 22 | Filora Ann Lynch | 12 | Daughter | — | Indiana |
| 23 | Theodore Jr. Lynch | 10 | Son | — | Indiana |
| 24 | Ollie A. Koch | 44 | Head | Pressman | Indiana |
| 25 | Anna Koch | 76 | Mother | — | Germany |
| 26 | Mary Koch | 52 | Sister | Tailoress | Indiana |
| 27 | Oliver Searcy | 56 | Head | Maintenance | Kentucky |
| 28 | Agnes Searcy | 49 | Wife | — | Indiana |
| 29 | Helen Rosebrock | 21 | Daughter | Clerk | Indiana |
| 30 | Carl Rosebrock | 22 | Son-in-law | Mechanic | Indiana |
| 31 | John D. Lauter | 54 | Head | Bartender | Indiana |
| 32 | Anna M. Lauter | 51 | Wife | — | Indiana |
| 33 | Louise Lauter | 24 | Daughter | Cashier | Indiana |
| 34 | John Jr. Lauter | 21 | Son | Laborer | Indiana |
| 35 | Ann Lauter | 19 | Daughter | Press Operator | Indiana |
| 36 | Walter Lauter | 12 | Son | — | Indiana |
| 37 | Joseph Jr. Schmelz | 65 | Head | — | Indiana |
| 38 | Elizabeth Schmelz | 61 | Wife | — | Indiana |
| 39 | Amelia Schmelz | 31 | Daughter | Bookkeeper | Indiana |
| 40 | Otto Schmelz | 36 | Son | Optician | Indiana |
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)