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John Chapman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Polk-County, Iowa
Our Model Tree links this John Chapman across the 1920, 1930 and 1940 US Censuses in Polk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1866), then head of a 3-person household.
Age 74
b. ~1866
Male
Head
Born: Virginia
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Polk-County, Iowa |
| Surname | Chapman |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | Des Moines city |
| 1935 Residence (County) | Polk |
| Additional Details | |
| Industry | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
| Township / Ward | Des Moines City |
| Est. Birth Year | ~1866 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| John Chapman | Head | — | 74 | ~1866 |
| Lawrence Chapman | Son | — | 37 | ~1903 |
| Willie Chapman | Spouse | — | 70 | ~1870 |
Census Appearances
1920
Polk, Iowa
Head, age 58
Polk, Iowa · implied b. ~1862 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Virginia |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Occupation | Miner |
| Industry | Coal Mine |
| Class of Worker | W |
| Can Read | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1930
Polk, Iowa
Head, age 63
Polk, Iowa · implied b. ~1867 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Chapman |
| Given Name | John |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | Black |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Virginia |
| Age at First Marriage | 29 |
| Father's Birthplace | Virginia |
| Mother's Birthplace | Virginia |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2000 |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
1940
Polk-County, Iowa
Head, age 74
Polk-County, Iowa · implied b. ~1866 — 3 household members
| Surname | Chapman |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 74 |
| Marital Status | Married |
| Birthplace | Virginia |
| 1935 Residence (City) | Des Moines city |
| 1935 Residence (County) | Polk |
| Industry | 0 |
| Highest Grade | No 3 |
| 1935 Residence | Same place |
| Birth State | Virginia |
| Birth Country | United States |
| Birthplace (normalized) | virginia |
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 Chapman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
John Chapman
Head · 1940 · age 74 · b. ~1866 · Iowa
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Polk-County, Iowa
Open full size
1940 US Federal Census — Polk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01196-00109)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Harry Carmichael | 33 | Head | Laborer | Ohio |
| 42 | Bessie Carmichael | 25 | Wife | — | Iowa |
| 43 | Ross V. Mengrone | 41 | Head | Owner-Prop | Italy |
| 44 | Patricia Mengrone | 27 | Wife | — | Italy |
| 45 | Phyllis G. Mengrone | 5 | Daughter | — | Iowa |
| 46 | Samuel L. Jones | 52 | Head | Painter-Int. Dec. | Iowa |
| 47 | Ethel Jones | 48 | Wife | Paper Hanger | Iowa |
| 48 | Morris Jones | 20 | Son | Attendant | Iowa |
| 49 | Ronald Jones | 17 | Son | Messenger | Iowa |
| 50 | Bonnie Ad. Jones | 14 | Daughter | — | Iowa |
| 51 | Gaylord Jones | 10 | Son | — | Iowa |
| 52 | Gloria Jones | 8 | Daughter | — | Iowa |
| 53 | Shirley Jones | 3 | Daughter | — | Iowa |
| 54 | Willard J. Aiken | 50 | Head | — | Illinois |
| 55 | Florence Aiken | 46 | Wife | Library Work | Illinois |
| 56 | Dorene Aiken | 21 | Daughter | Clerical | Iowa |
| 57 | Lorretta Aiken | 19 | Daughter | — | Iowa |
| 58 | Vern Aiken | 11 | Son | — | Iowa |
| 59 | Hymen Levich | 63 | Head | Real-Est. Inv. | Iowa |
| 60 | Minnie Levich | 60 | Wife | — | Iowa |
| 61 | Cassie Levich | 53 | Brother | Retired | Iowa |
| 62 | Cleta Kreiss | 37 | Head | Agricultural Survey | Illinois |
| 63 | Carmen Kreiss | 16 | Daughter | — | Illinois |
| 64 | Harold Kreiss | 15 | Son | — | Illinois |
| 65 | Beverly Kreiss | 14 | Daughter | — | Illinois |
| 66 | James W. Cameron | 92 | Head | Retired | Canada |
| 67 | Effie E. Cameron | 68 | Wife | — | Iowa |
| 68 | Isabel Cameron | 90 | Sister | — | Canada |
| 69 | Cora Owens | 59 | Head | Housework | Iowa |
| 70 | Abe Burns | 57 | Head | Tailor | Russia |
| 71 | Rose Burns | 51 | Wife | — | Minnesota |
| 72 | Conrad E. Burns | 20 | Son | — | Iowa |
| 73 | Frances B. Burns | 16 | Daughter | — | Iowa |
| 74 | Lloyd Adams | 42 | Head | Utility-Man | Missouri |
| 75 | Jeannette Adams | 41 | Wife | — | Iowa |
| 76 | Gale Adams | 10 | Son | — | Iowa |
| 77 | Marion Mann | None | Lodger | — | — |
| 78 | John J. Chapman THIS PERSON | 74 | Head | — | Virginia |
| 79 | Willie J. Chapman | 70 | Wife | — | Virginia |
| 80 | Lawrence J. Chapman | 37 | Son | Recreation | 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)