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James Martin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this James Martin across the 1920, 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed), with identified parents Rolla & Ralph — first a head (b.~1913), then head of a 3-person household.
Age 27
b. ~1913
Male
Head
Born: Indiana
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Martin |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Occupation | Deputy Sheriff |
| Industry | County Sheriff office |
| Class of Worker | GW |
| Hours Worked | 84 |
| Income (1939) | 1325 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Deputy Sheriff |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1913 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Joyce Martin | Daughter | — | 1 | ~1939 |
| James Martin | Head | — | 27 | ~1913 |
| Harriet Martin | Spouse | — | 23 | ~1917 |
Census Appearances
1920
Marion, Indiana
Son, age 6
Marion, Indiana · implied b. ~1914 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 6 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1930
Marion, Indiana
Son, age 17
Marion, Indiana · implied b. ~1913 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Martin |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Head, age 27
Marion-County, Indiana · implied b. ~1913 — 3 household members
| Surname | Martin |
| Given Name | James |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Married |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Occupation | Deputy Sheriff |
| Industry | County Sheriff office |
| Class of Worker | GW |
| Hours Worked | 84 |
| Income (1939) | 1325 |
| Highest Grade | 8 |
| 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 James Martin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Rolla Martin (~0.92 confidence) and father Ralph Martin (~0.92 confidence) and mother Effie Martin (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Rolla Martin
b. ~1876
Source father
● Household
· direct · ~0.92
Father
Ralph Martin
b. ~1877
Source father
● Household
· direct · ~0.92
Mother
Effie Martin
b. ~1880
Source mother
● Household
· direct · ~0.92
This person
Anchor record
James Martin
Head · 1940 · age 27 · b. ~1913 · 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-t0627-01129-00608)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Pliny Joyce | 35 | Head | Traffic Representative | Indiana |
| 2 | Marie Joyce | 29 | Wife | — | Indiana |
| 3 | William Joyce | 9 | Son | — | Indiana |
| 4 | Alphonse Wendling | 39 | Head | Dairy Superintendent | Indiana |
| 5 | Velma Wendling | 31 | Wife | — | Indiana |
| 6 | Carolyn Wendling | 3 | Daughter | — | Indiana |
| 7 | Loren Woods | 33 | Head | Tool Grinder | Indiana |
| 8 | Marie Woods | 32 | Wife | — | Indiana |
| 9 | Richard Woods | 10 | Son | — | Indiana |
| 10 | John Muse | 23 | Head | Pharmacist | Indiana |
| 11 | Helen Muse | 25 | Wife | — | Indiana |
| 12 | Charlene Muse | 0 | Daughter | — | Indiana |
| 13 | Louis Smith | 28 | Head | Tape Machine Operator | Indiana |
| 14 | Mary Smith | 30 | Wife | Bottle Filler | Indiana |
| 15 | Robert Cline | 57 | Head | Bundle Marker | Indiana |
| 16 | Elizabeth Cline | 52 | Wife | — | Indiana |
| 17 | William Peterson | 67 | Head | Truck Driver | Indiana |
| 18 | Maynard Doolin | 25 | Son in law | Knitter | Illinois |
| 19 | Ruth Doolin | 20 | Daughter | — | Indiana |
| 20 | Peggy Ann Doolin | 1 | Granddaughter | — | Indiana |
| 21 | James Martin THIS PERSON | 27 | Head | Deputy Sheriff | Indiana |
| 22 | Harriet Martin | 23 | Wife | — | Indiana |
| 23 | Joyce Martin | 1 | Daughter | — | Indiana |
| 24 | Basil True | 28 | Head | Deliveryman | Indiana |
| 25 | Esther True | 22 | Wife | — | Indiana |
| 26 | Brenda True | 0 | Daughter | — | Indiana |
| 27 | Albert Dornbush | 42 | Head | Millman | Indiana |
| 28 | Olive Dornbush | 45 | Wife | — | Kentucky |
| 29 | Robert Hoober | 22 | Head | Crib-Tender | Missouri |
| 30 | Lucille Hoober | 18 | Wife | — | Indiana |
| 31 | Harry Zaiser | 29 | Head | Draftsman | Indiana |
| 32 | Evelyn Zaiser | 26 | Wife | — | Kentucky |
| 33 | Marcella Zaiser | 4 | Daughter | — | Indiana |
| 34 | Robert Sparks | 79 | Head | — | Indiana |
| 35 | Charlotte Sparks | 57 | Wife | — | Indiana |
| 36 | Arthur Silcox | 23 | Head | Grinder | Indiana |
| 37 | Annabel Silcox | 21 | Wife | — | West Virginia |
| 38 | Leslie Wright | 28 | Head | Laborer | Kentucky |
| 39 | Mattie Wright | 24 | Wife | — | Tennessee |
| 40 | Robert Wright | 4 | Son | — | Kentucky |
Pedigree Summary
James
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)