JC
James Cochran — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Black-Hawk-County, Iowa
Our Model Tree links this James Cochran across the 1930 and 1940 US Censuses in Black-Hawk-County, Iowa (XGBoost, ~Confirmed) — first a head (b.~1895), then head of a 11-person household.
Age 45
b. ~1895
Male
Head
Born: Tennessee
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Black-Hawk-County, Iowa |
| Surname | Cochran |
| Given Name | James N. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Cedar Falls City |
| 1935 Residence (County) | Black Hawk |
| Additional Details | |
| Occupation | Plumbing |
| Industry | Building |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 942 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
| Occupation | Plumbing |
| Township / Ward | Cedar Falls City |
| Est. Birth Year | ~1895 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Elsie Cochran | Spouse | — | 30 | ~1910 |
| James Cochran | Head | — | 45 | ~1895 |
| Robert Ward | Other | — | 7 | ~1933 |
| Donald Cochran | Son | — | 10 | ~1930 |
| Marilyn Cochran | Daughter | — | 16 | ~1924 |
| Kenneth Cochran | Son | — | 7 | ~1933 |
| Richard Cochran | Son | — | 6 | ~1934 |
| Vera Cochran | Daughter | — | 11 | ~1929 |
| Eugene Cochran | Son | — | 18 | ~1922 |
| Virginia Ward | Other | — | 9 | ~1931 |
| James Cochran | Son | — | 12 | ~1928 |
Census Appearances
1930
Black Hawk, …
Head, age 34
Black Hawk, Iowa · implied b. ~1896 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cochran |
| Given Name | James M. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Tennessee |
| Age at First Marriage | 22 |
| Father's Birthplace | Tennessee |
| Mother's Birthplace | Tennessee |
| Occupation | Lather |
| Industry | Buildings |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 10 |
| Veteran | No |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
1940
Black-Hawk-County, Iowa
Head, age 45
Black-Hawk-County, Iowa · implied b. ~1895 — 11 household members
| Surname | Cochran |
| Given Name | James N. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 45 |
| Marital Status | Married |
| Birthplace | Tennessee |
| 1935 Residence (City) | Cedar Falls City |
| 1935 Residence (County) | Black Hawk |
| Occupation | Plumbing |
| Industry | Building |
| Class of Worker | OA |
| Hours Worked | 48 |
| Income (1939) | 942 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Tennessee |
| Birth Country | United States |
| Birthplace (normalized) | tennessee |
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 Cochran across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
James Cochran
Head · 1940 · age 45 · b. ~1895 · 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 — Black-Hawk-County, Iowa
Open full size
1940 US Federal Census — Black-Hawk-County, Iowa
Page Contents
37 people indexed on this census page (nara:1940:m-t0627-01139-00187)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Pearl Zeiner | 50 | Wife | — | Iowa |
| 42 | Marvel Schultz | 37 | Son-in-law | Truck Driver | Minnesota |
| 43 | Violet Schultz | 29 | Daughter | — | Iowa |
| 44 | Beverly Jean Zeiner | 9 | Granddaughter | — | Iowa |
| 46 | Pete Rasmussen | 55 | Head | Electrician | Iowa |
| 47 | Madge Junger | 39 | Housekeeper | Housekeeper | Iowa |
| 48 | Paul Rusch | 44 | Head | General Labor. | Iowa |
| 49 | Margaret Rusch | 44 | Wife | — | Iowa |
| 50 | Mary Rusch | 19 | Daughter | Housework | Iowa |
| 51 | Charles Rasmussen | 51 | Head | Laborer | Iowa |
| 53 | Rollin Mcmillan | 61 | Head | Carpenter & Cabinet Maker | Iowa |
| 55 | James N. Cochran THIS PERSON | 45 | Head | Plumbing | Tennessee |
| 56 | Elsie Cochran | 30 | Wife | — | Iowa |
| 57 | Eugene Cochran | 18 | Son | News Washer | Iowa |
| 58 | Marilyn Cochran | 16 | Daughter | — | Iowa |
| 59 | James Jr. Cochran | 12 | Son | — | Michigan |
| 60 | Vera Cochran | 11 | Daughter | — | Michigan |
| 61 | Donald Cochran | 10 | Son | — | Iowa |
| 62 | Kenneth Cochran | 7 | Son | — | Iowa |
| 63 | Richard Cochran | 6 | Son | — | Iowa |
| 64 | Virginia Ward | 9 | Stepdaughter | — | Iowa |
| 65 | Robert Ward | 7 | Stepson | — | Iowa |
| 66 | Dale Guyer | 25 | Head | Painter & Decorator | Montana |
| 67 | Rosie Guyer | 26 | Wife | — | Iowa |
| 68 | Dale Duane Guyer | 6 | Son | — | Iowa |
| 69 | Calvin Guyer | 5 | Son | — | Iowa |
| 70 | Joyce Guyer | 4 | Daughter | — | Iowa |
| 71 | John Guyer | 1 | Son | — | Iowa |
| 72 | James C. Hoel | 46 | Head | Carpenter | Iowa |
| 73 | Nona Hoel | 31 | Wife | — | Iowa |
| 74 | June Hoel | 6 | Daughter | — | Iowa |
| 75 | Ned Haukey | 35 | Head | Mechanic | Iowa |
| 76 | Madeline Haukey | 33 | Wife | — | Iowa |
| 77 | Sallie Joan Haukey | 1 | Daughter | — | Iowa |
| 78 | Ralph Fugetz | 32 | Head | Garment Cutter | Iowa |
| 79 | A. T. Barret | 47 | Head | Elect. | Iowa |
| 80 | Ellen Barret | 46 | Wife | — | 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)