CH
Charles Hartman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Linn-County, Iowa
Our Model Tree links this Charles Hartman across the 1920, 1930 and 1940 US Censuses in Linn-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1915), then head of a 7-person household.
Age 25
b. ~1915
Male
Head
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Linn-County, Iowa |
| Surname | Hartman |
| Given Name | Charles E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Additional Details | |
| Occupation | laborer |
| Industry | road projects |
| Class of Worker | GW |
| Hours Worked | 2 |
| Income (1939) | 300 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Occupation | Laborer |
| Township / Ward | Cedar Rapids |
| Est. Birth Year | ~1915 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Charles | Age | Birth yr |
|---|---|---|---|---|
| Nellie Hartman | Daughter | — | ~1940 | |
| Donna Hartman | Daughter | — | 2 | ~1938 |
| Richard Hartman | Son | — | 3 | ~1937 |
| Charles Hartman | Head | — | 25 | ~1915 |
| Charles Hartman | Son | — | 4 | ~1936 |
| Dorothy Hartman | Spouse | — | 22 | ~1918 |
| John Hartman | Son | — | 6 | ~1934 |
Census Appearances
1920
Linn, Iowa
Other, age 5
Linn, Iowa · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | Charley |
| Relationship to Head | Nephew |
| Sex | M |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Occupation | none |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Linn, Iowa
Other, age 15
Linn, Iowa · implied b. ~1915 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hartman |
| Given Name | Charles D. |
| Relationship to Head | Step son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Iowa |
| Father's Birthplace | Iowa |
| Mother's Birthplace | Iowa |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Linn-County, Iowa
Head, age 25
Linn-County, Iowa · implied b. ~1915 — 7 household members
| Surname | Hartman |
| Given Name | Charles E |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 25 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Cedar Rapids |
| 1935 Residence (County) | Linn |
| Occupation | laborer |
| Industry | road projects |
| Class of Worker | GW |
| Hours Worked | 2 |
| Income (1939) | 300 |
| Highest Grade | H-1 |
| 1935 Residence | Same place |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
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 Charles Hartman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Charles Hartman
Head · 1940 · age 25 · b. ~1915 · Iowa
★ 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 — Linn-County, Iowa
Open full size
1940 US Federal Census — Linn-County, Iowa
Page Contents
20 people indexed on this census page (nara:1940:m-t0627-01177-00668)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 42 | Charles E Hartman THIS PERSON | 25 | Head | Laborer | Iowa |
| 43 | Dorothy Hartman | 22 | wife | — | Iowa |
| 44 | John David Hartman | 6 | son | — | Iowa |
| 45 | Charles G Hartman | 4 | son | — | Iowa |
| 46 | Richard Leroy Hartman | 3 | son | — | Iowa |
| 47 | Donna Lee Hartman | 2 | daughter | — | Iowa |
| 48 | Nellie Louise Hartman | 0 | daughter | — | Iowa |
| 50 | Alonzo Clawson | 37 | Head | A.K.A. Write-Up Man | Kansas |
| 51 | Estella Clawson | 33 | wife | — | Kansas |
| 52 | Alonzo Jr Clawson | 15 | son | — | Iowa |
| 53 | Robert Eugene Clawson | 12 | son | — | Iowa |
| 54 | Dolly Mae Clawson | 9 | daughter | — | Iowa |
| 56 | Emil Gradsky | 33 | Head | Laborer Packing Div. | Iowa |
| 57 | Louise Gradsky | 24 | wife | — | Iowa |
| 58 | Richard Gradsky | 5 | son | — | Iowa |
| 60 | Arthur L Larson | 40 | cousin | Carpenter | Iowa |
| 62 | Frank A. Clark | 66 | Lodger | Coal Carrier | Indiana |
| 64 | Henry W Wallace | 76 | Lodger | Truck Driver | Indiana |
| 66 | Virgil Erue | 25 | Lodger | Plumber | Iowa |
| 67 | Rose Erue | 22 | Lodger | — | Iowa |
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)