DM
David Mitchell — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this David Mitchell across the 1920, 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1863), then head of a 4-person household.
Age 77
b. ~1863
Male
Head
Born: Kansas
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Mitchell |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Highest Grade | S 8 |
| 1935 Residence | Same house |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Waterloo City |
| Est. Birth Year | ~1863 |
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.
4 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| L Mitchell | Daughter | — | 24 | ~1916 |
| Lizzie Mitchell | Spouse | — | 65 | ~1875 |
| David Mitchell | Head | — | 77 | ~1863 |
| Laura Mitchell | Daughter | — | 23 | ~1917 |
Census Appearances
1920
Black Hawk, …
Head, age 56
Black Hawk, Iowa · implied b. ~1864 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mitchell |
| Given Name | David W |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 56 |
| Marital Status | Married |
| Birthplace | Kansas |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Germany |
| Occupation | Laborer |
| Industry | Steam railroad |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Black Hawk, …
Head, age 68
Black Hawk, Iowa · implied b. ~1862 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mitchell |
| Given Name | David N. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 68 |
| Marital Status | Married |
| Birthplace | Kansas |
| Father's Birthplace | Ireland, North |
| Mother's Birthplace | Germany |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 2000 |
| Veteran | No |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Black-Hawk-County, Iowa
Head, age 77
Black-Hawk-County, Iowa · implied b. ~1863 — 4 household members
| Surname | Mitchell |
| Given Name | David |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 77 |
| Marital Status | Married |
| Birthplace | Kansas |
| 1935 Residence (City) | Waterloo City |
| 1935 Residence (County) | Black Hawk |
| Highest Grade | S 8 |
| 1935 Residence | Same house |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 David Mitchell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
David Mitchell
Head · 1940 · age 77 · b. ~1863 · 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 — Black-Hawk-County, Iowa
Open full size
1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01140-00747)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Marlys E. Euchner | 13 | daughter | — | Iowa |
| 42 | Dale W. Euchner | 10 | Son | — | Iowa |
| 43 | Marvin R. Euchner | 8 | Son | — | Iowa |
| 44 | Glenn H. Euchner | 7 | Son | — | Iowa |
| 45 | Norman E. Euchner | 4 | Son | — | Iowa |
| 46 | Jack L. Oxford | 46 | Head | Shipping Clerk | Michigan |
| 47 | Grace E. Oxford | 41 | Wife | — | Iowa |
| 48 | Eleanor B. Oxford | 14 | daughter | — | Iowa |
| 49 | Jean H. Oxford | 8 | daughter | — | Iowa |
| 50 | Edgar W. Trego | 74 | lodger | Laborer | Illinois |
| 51 | Paul W. Kroblin | 34 | Head | Receiving Dept | Iowa |
| 52 | Pearl O. Kroblin | 40 | Wife | Seamstress | Iowa |
| 53 | Charles A. Harrington | 34 | Head | Metal Polisher | Iowa |
| 54 | Edna D. Harrington | 28 | Wife | — | Iowa |
| 55 | Walter E. Robbins | 25 | Head | Repair Work & Salesman | Iowa |
| 56 | Marie A. Robbins | 34 | Wife | — | Illinois |
| 57 | Frederick W. Robbins | 3 | Son | — | Iowa |
| 58 | Vincent F. Marlow | 47 | Head | Test Room | Iowa |
| 59 | Gladys Marlow | 43 | Wife | — | Minnesota |
| 60 | John Owen Marlow | 14 | Son | — | South Dakota |
| 61 | Lorenzo C. Beckner | 48 | Head | Dispatcher | Illinois |
| 62 | Clil M. Beckner | 48 | Wife | — | Missouri |
| 63 | Maurice K. Beckner | 20 | Son | Brakeman | Iowa |
| 64 | Gordon L. Beckner | 11 | Son | — | Iowa |
| 65 | David Mitchell THIS PERSON | 77 | Head | — | Kansas |
| 66 | Lizzie Mitchell | 65 | Wife | — | Kansas |
| 67 | L. Mae Mitchell | 24 | daughter | Stenographer | Iowa |
| 68 | Laura Mitchell | 23 | daughter | Stenographer | Iowa |
| 69 | Lawrence J. O'Connell | 25 | Head | Baker | Iowa |
| 70 | June M. O'Connell | 24 | Wife | — | Iowa |
| 71 | Charles Lee O'Connell | 1 | Son | — | Iowa |
| 72 | Albert L. Morris | 33 | Head | Baker | Illinois |
| 73 | Celene M. Morris | 23 | Wife | — | Missouri |
| 74 | Jerry A. Morris | 7 | Son | — | Nebraska |
| 75 | Paul V. Leaman | 31 | Head | Diamond Bore Machinist | Iowa |
| 76 | Susie B. Leaman | 24 | Wife | — | Iowa |
| 77 | Donald E. Leaman | 1 | Son | — | Iowa |
| 78 | Extra Line | None | Due to misinformation given by neighbor when I first called. | — | — |
| 79 | Extra Line | None | — | — | — |
| 80 | George M. Carr | 32 | Head | Cook | 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)