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James Monroe — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Lake-County, Indiana
Our Model Tree links this James Monroe across the 1930 and 1940 US Censuses in Lake-County, Indiana (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Male
Son
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Lake-County, Indiana |
| Surname | Monroe |
| Given Name | James Don |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Gary City |
| 1935 Residence (County) | Lake |
| Additional Details | |
| Occupation | Salesman |
| Industry | Retail drug store |
| Class of Worker | PW |
| Hours Worked | 43 |
| Income (1939) | 400 |
| Highest Grade | No-8 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Occupation | Salesman |
| Township / Ward | Gary City |
| Est. Birth Year | ~1920 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Catherine Monroe | Daughter | — | 27 | ~1913 |
| Helen Monroe | Daughter | — | 31 | ~1909 |
| James Osberg | Other | — | 3 | ~1937 |
| Cecelia Monroe | Daughter | — | 24 | ~1916 |
| Bridget Monroe | Head | — | 59 | ~1881 |
| Manville Osberg | Other | — | 29 | ~1911 |
| Frances Monroe | Daughter | — | 15 | ~1925 |
| James Monroe | Son | — | 20 | ~1920 |
| Barbara Osberg | Daughter | — | 23 | ~1917 |
| Alice Evans | Other | — | 10 | ~1930 |
Census Appearances
1930
Lake, Indiana
Son, age 10
Lake, Indiana · implied b. ~1920 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Monroe |
| Given Name | James |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Lake-County, Indiana
Son, age 20
Lake-County, Indiana · implied b. ~1920 — 10 household members
| Surname | Monroe |
| Given Name | James Don |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Gary City |
| 1935 Residence (County) | Lake |
| Occupation | Salesman |
| Industry | Retail drug store |
| Class of Worker | PW |
| Hours Worked | 43 |
| Income (1939) | 400 |
| Highest Grade | No-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 Monroe across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Monroe
Son · 1940 · age 20 · b. ~1920 · Indiana
★ You are viewing this record
Sibling
Cecelia Monroe
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Barbara Osberg
Sibling · 1940 · age 23
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Catherine Monroe
Sibling · 1940 · age 27
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Monroe
Sibling · 1940 · age 31
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Frances Monroe
Sibling · 1940 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Lake-County, Indiana
Open full size
1940 US Federal Census — Lake-County, Indiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01119-00406)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fred Schattat | 49 | Head | Roll Turner | Germany |
| 2 | Hedwig Schattat | 46 | Wife | Alteration Lady | Germany |
| 3 | Herbert J. Morris | 34 | Head | Lawyer | Illinois |
| 4 | Marian Morris | 32 | Wife | — | Indiana |
| 5 | Harry Hubber | 47 | Head | Helper - Open Hearth | Pennsylvania |
| 6 | Mildred Hubber | 41 | Wife | — | Alabama |
| 7 | Edward Bretainger | 43 | Head | Dinner - Tin Mill | Ohio |
| 8 | Doris Bretainger | 24 | Wife | — | Ohio |
| 9 | Alex Ingelovich | 33 | Head | Accountant | Czechoslovakia |
| 10 | Marie Ingelovich | 24 | Wife | — | Oregon |
| 11 | Harry Weeks | 52 | Head | Proprietor | Canada English |
| 12 | Lucille Weeks | 46 | Wife | — | New York |
| 13 | Robert Weeks | 15 | Son | — | Michigan |
| 14 | John Rasmussen | 48 | Head | Inspector - Advertising Manager | Illinois |
| 15 | Isabel Rasmussen | 38 | Wife | — | Minnesota |
| 16 | Byron Crane | 48 | Head | Plant Manager | Michigan |
| 17 | Sarah Mae Crane | 39 | Wife | — | Michigan |
| 18 | B. Robert Crane | 12 | Son | — | Indiana |
| 19 | George Earl Thomas | 56 | Head | Agent | Indiana |
| 20 | Mary Jane Thomas | 50 | Wife | Agent | Pennsylvania |
| 21 | Emma E. Rice | 76 | Mother-in-law | — | Pennsylvania |
| 22 | Bridget Monroe | 59 | Head | — | Pennsylvania |
| 23 | Helen Monroe | 31 | Daughter | Bookkeeper - Stenographer | Pennsylvania |
| 24 | Catherine Monroe | 27 | Daughter | Counterless Saleslady | Indiana |
| 25 | Cecelia Monroe | 24 | Daughter | Waitress | Indiana |
| 26 | James Don Monroe THIS PERSON | 20 | Son | Salesman | Indiana |
| 27 | Frances Monroe | 15 | Daughter | — | Indiana |
| 28 | Alice Jean Evans | 10 | Granddaughter | — | Indiana |
| 29 | Manville Osberg | 29 | Son-in-law | Shearsman Helper | Indiana |
| 30 | Barbara Osberg | 23 | Daughter | — | Pennsylvania |
| 31 | James Osberg | 3 | Grandson | — | Indiana |
| 32 | Walter Regal | 47 | Head | Jeweler And Optometrist | Illinois |
| 33 | Myrtle Regal | 38 | Wife | — | Illinois |
| 34 | Lois Regal | 10 | Daughter | — | Illinois |
| 35 | Carol Regal | 6 | Daughter | — | Indiana |
| 36 | Carl Kahlman | 38 | Head | Car Blocker - Type Plate Mill | Germany |
| 37 | Marie Kahlman | 41 | Wife | — | Germany |
| 38 | Theresa Kahlman | 14 | Daughter | — | Indiana |
| 39 | Harlett Kahlman | 10 | Daughter | — | Indiana |
| 40 | Harold C. Pfautz | 42 | Lodger | Foreman - Type Plate Mill | Indiana |
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)