JH
John Hartman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Iroquois-County, Illinois
Our Model Tree links this John Hartman across the 1930 and 1940 US Censuses in Iroquois-County, Illinois (XGBoost, ~Confirmed) — first a son (b.~1913), then head of a 12-person household.
Age 27
b. ~1913
Male
Son
Born: Minnesota
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Iroquois-County, Illinois |
| Surname | Hartman |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Milks Grove |
| 1935 Residence (County) | Iroquois |
| Additional Details | |
| Occupation | Farm laborer |
| Industry | farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 310 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
| Occupation | Farm Laborer |
| Township / Ward | Milks Grove |
| 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.
12 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Rosalie Hartman | Daughter | — | 7 | ~1933 |
| Gertrude Hartman | Daughter | — | 15 | ~1925 |
| Ethel Hartman | Daughter | — | 9 | ~1931 |
| Dorothy Hartman | Daughter | — | 16 | ~1924 |
| Alice Hartman | Daughter | — | 13 | ~1927 |
| Lucille Hartman | Daughter | — | 11 | ~1929 |
| George Hartman | Head | — | 62 | ~1878 |
| Delbert Hartman | Son | — | 18 | ~1922 |
| Donald Hartman | Son | — | 5 | ~1935 |
| Joseph Hartman | Son | — | 29 | ~1911 |
| John Hartman | Son | — | 27 | ~1913 |
| Josephine Hartman | Spouse | — | 47 | ~1893 |
Census Appearances
1930
Iroquois, Illinois
Other, age 17
Iroquois, Illinois · implied b. ~1913 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | John |
| Relationship to Head | Son P. |
| Sex | M |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Minnesota |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Minnesota |
| Occupation | Farm Laborer |
| Industry | General Farm |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
1940
Iroquois-County, Illinois
Son, age 27
Iroquois-County, Illinois · implied b. ~1913 — 12 household members
| Surname | Hartman |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Minnesota |
| 1935 Residence (City) | Milks Grove |
| 1935 Residence (County) | Iroquois |
| Occupation | Farm laborer |
| Industry | farm |
| Class of Worker | PW |
| Hours Worked | 60 |
| Income (1939) | 310 |
| Highest Grade | No 8 |
| 1935 Residence | Same place |
| Birth State | Minnesota |
| Birth Country | United States |
| Birthplace (normalized) | minnesota |
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 Hartman across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
John Hartman
Son · 1940 · age 27 · b. ~1913 · Illinois
★ You are viewing this record
Sibling
Donald Hartman
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Hartman
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Hartman
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Ethel Hartman
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Hartman
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Delbert Hartman
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucille Hartman
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rosalie Hartman
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Gertrude Hartman
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 — Iroquois-County, Illinois
Open full size
1940 US Federal Census — Iroquois-County, Illinois
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00813-00773)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Clyde Carmain | 27 | Son | Farm Laborer | Illinois |
| 42 | Elsie Carmain | 29 | Daughter in law | No No No No H | Illinois |
| 43 | Edith Carmain | 12 | Granddaughter | — | Illinois |
| 44 | Gideon Rinkenberger | 39 | Head | Farmer | Illinois |
| 45 | Tillie Rinkenberger | 38 | Wife | No No No No H | Illinois |
| 46 | Kathleen Rinkenberger | 16 | Daughter | No No No No S | Illinois |
| 47 | Marcella Rinkenberger | 15 | Daughter | No No No No S | Illinois |
| 48 | Dolores Rinkenberger | 13 | Daughter | No No No No S | Illinois |
| 49 | Richard Rinkenberger | 12 | Son | — | Illinois |
| 50 | Gene Rinkenberger | 11 | Son | — | Illinois |
| 51 | Robert Dyon | 42 | Head | Farmer | Illinois |
| 52 | Leila Dyon | 42 | Wife | No No No No H | Illinois |
| 53 | George Hartman | 62 | Head | Farmer | Illinois |
| 54 | Josephine Hartman | 47 | Wife | No No No No H | Minnesota |
| 55 | Joseph Hartman | 29 | Son | Farm Laborer | Minnesota |
| 56 | John Hartman THIS PERSON | 27 | Son | Farm Laborer | Minnesota |
| 57 | Delbert Hartman | 18 | Son | Farm Laborer | Illinois |
| 58 | Dorothy Hartman | 16 | Daughter | No No No No S | Illinois |
| 59 | Gertrude Hartman | 15 | Daughter | No No No No S | Illinois |
| 60 | Alice Hartman | 13 | Daughter | — | Illinois |
| 61 | Lucille Hartman | 11 | Daughter | — | Illinois |
| 62 | Ethel Hartman | 9 | Daughter | — | Illinois |
| 63 | Rosalie Hartman | 7 | Daughter | — | Illinois |
| 64 | Donald Hartman | 5 | Son | — | Illinois |
| 65 | Mathew Gleney | 38 | Head | Farmer | Illinois |
| 66 | Margaret Gleney | 39 | Wife | No No No No H | Illinois |
| 67 | M. Paul Gleney | 5 | Son | — | Illinois |
| 68 | Fred Hall | 32 | Head | Farmer | Indiana |
| 69 | Edna Hall | 28 | Wife | No No No No H | Wisconsin |
| 70 | Edna Mae Hall | 7 | Daughter | — | Illinois |
| 71 | Theodore Hall | 5 | Son | — | Illinois |
| 72 | Edward Weaver | 31 | Head | Farmer | Illinois |
| 73 | Reba Weaver | 25 | Wife | No No No No H | Tennessee |
| 74 | Will George Weaver | 18 | Lodger | No No No No S | Illinois |
| 75 | Ralph Kroll | 39 | Head | Farmer | Illinois |
| 76 | Pearl Kroll | 34 | Wife | No No No No H | Illinois |
| 77 | Eylene Kroll | 13 | Daughter | — | Illinois |
| 78 | Darlene Kroll | 11 | Daughter | — | Illinois |
| 79 | Charles Harris | 29 | Head | Farm Laborer | Illinois |
| 80 | Evelyn Harris | 25 | Wife | No No No No H | Illinois |
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)