JL
John Logan — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this John Logan across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Delia & Delia — first a son (b.~1919), then head of a 4-person household.
Age 21
b. ~1919
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Logan |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Stock Clerk |
| Industry | Dept Store |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 600 |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Stock Clerk |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1919 |
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 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Martin Logan | Head | — | 54 | ~1886 |
| Ann Duggan | Other | — | 52 | ~1888 |
| John Logan | Son | — | 21 | ~1919 |
| Delia Logan | Spouse | — | 55 | ~1885 |
Census Appearances
1920
Marion, Indiana
Son, age 1
Marion, Indiana · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Logan |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Speaks English | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 11
Marion, Indiana · implied b. ~1919 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Logan |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Son, age 21
Marion-County, Indiana · implied b. ~1919 — 4 household members
| Surname | Logan |
| Given Name | John P. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Stock Clerk |
| Industry | Dept Store |
| Class of Worker | PW |
| Hours Worked | 36 |
| Income (1939) | 600 |
| 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 Logan across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: mother Delia Logan (~0.92 confidence) and mother Delia Logan (~0.92 confidence) and father Martin Logan (~0.92 confidence) and mother Rita Logan (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Mother
Delia Logan
b. ~1885
Source mother
● Household
· direct · ~0.92
Mother
Delia Logan
b. ~1885
Source mother
● Household
· direct · ~0.92
Father
Martin Logan
b. ~1885
Source father
● Household
· direct · ~0.92
Mother
Rita Logan
b. ~1886
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Logan
Son · 1940 · age 21 · b. ~1919 · 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-t0627-01125-00868)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Richard C. Carper | 20 | Son | Clerk | Indiana |
| 42 | Alton Isadore | 32 | Head | Wireman | Indiana |
| 43 | Ethel D. Isadore | 30 | Wife | — | Indiana |
| 44 | Max Isadore | 4 | Son | 0 | Indiana |
| 45 | Maryland Sue Isadore | 3 | Daughter | 0 | Indiana |
| 46 | Milton Gunn | 34 | Lodger | Final Inspector | Ohio |
| 47 | Albert Strait | 24 | Lodger | Fireman | Indiana |
| 48 | Addison G. Tate | 42 | Head | Engineer | Virginia |
| 49 | Rosa D. Tate | 42 | Wife | — | Virginia |
| 50 | Addison Ray Tate | 22 | Son | Core Maker | Virginia |
| 51 | Edith C. Tate | 18 | Daughter | Comp Operator | Virginia |
| 52 | Eunice M. Tate | 14 | Daughter | — | West Virginia |
| 53 | Alice M. Tate | 12 | Daughter | — | Indiana |
| 54 | Walter Smith | 36 | Head | Machinist Helper | Indiana |
| 55 | Teresa Smith | 40 | Sister | — | Ohio |
| 56 | Helen Kayer | 25 | Daughter | Beauty Operator | Indiana |
| 57 | Edward Kayer | 51 | Head | Maintenance Foreman | Indiana |
| 58 | Hazel Kayer | 50 | Wife | — | Indiana |
| 59 | Martin Logan | 54 | Head | Inspector | Ireland |
| 60 | Delia Logan | 55 | Wife | — | Ireland |
| 61 | John P. Logan THIS PERSON | 21 | Son | Stock Clerk | Indiana |
| 62 | Ann Duggan | 52 | Sister in law | — | Ireland |
| 63 | Marion Paul Harper | 47 | Head | Gas Painter | Germany |
| 64 | Mable Marie Harper | 44 | Wife | Helper | Illinois |
| 65 | Sarah J. Barnes | 74 | Mother in law | — | Illinois |
| 66 | Porter Pate | 40 | Head | Contractor | Alabama |
| 67 | Mildred Pate | 33 | Wife | — | Indiana |
| 68 | Milton Pate | 13 | Son | — | Indiana |
| 69 | Pacia Jane Pate | 8 | Daughter | — | Indiana |
| 70 | Donald Murphy | 32 | Head | Policeman | Indiana |
| 71 | Myrtle Murphy | 27 | Wife | — | Indiana |
| 72 | Michael Murphy | 5 | Son | — | Indiana |
| 73 | Earl Roberts | 48 | Head | — | Indiana |
| 74 | Stella Roberts | 47 | Wife | — | Indiana |
| 75 | Robert Rainey | 34 | Head | Janitor | Indiana |
| 76 | Elsie Rainey | 34 | Wife | — | Kentucky |
| 77 | Francis Louise Rainey | 6 | Daughter | — | Indiana |
| 78 | Raymond Rainey | 3 | Son | 0 | Indiana |
| 79 | Ester Rainey | 19 | Niece | Manicure Girl | Indiana |
| 80 | Samuel Tygart | 46 | Head | Plumber | Kentucky |
Pedigree Summary
John
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 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)