EC
Emma Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boone-County, Iowa
Our Model Tree links this Emma Cooper across the 1920, 1930 and 1940 US Censuses in Boone-County, Iowa (XGBoost, ~Confirmed) — first a spouse (b.~1877), then head of a 6-person household.
Age 63
b. ~1877
Female
Spouse
Born: Iowa
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Boone-County, Iowa |
| Surname | Cooper |
| Given Name | Emma |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Colfax Twp. |
| 1935 Residence (County) | Boone |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
| Township / Ward | Colfax Twp |
| Est. Birth Year | ~1877 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Emma | Age | Birth yr |
|---|---|---|---|---|
| Wilford Krabbe | Other | — | 28 | ~1912 |
| Susan Leininger | Other | — | 88 | ~1852 |
| John Cooper | Head | — | 64 | ~1876 |
| Emma Cooper | Spouse | — | 63 | ~1877 |
| Edwin Cooper | Son | — | 26 | ~1914 |
| Donald Butterfield | Other | — | 12 | ~1928 |
Census Appearances
1920
Boone, Iowa
Spouse, age 43
Boone, Iowa · implied b. ~1877 — 11 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Emma R. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Iowa |
| Father's Birthplace | Germany |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1930
Boone, Iowa
Spouse, age 53
Boone, Iowa · implied b. ~1877 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Emma |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Iowa |
| Age at First Marriage | 22 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Germany |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Iowa |
| Birth Country | United States |
| Birthplace (normalized) | iowa |
1940
Boone-County, Iowa
Spouse, age 63
Boone-County, Iowa · implied b. ~1877 — 6 household members
| Surname | Cooper |
| Given Name | Emma |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 63 |
| Marital Status | Married |
| Birthplace | Iowa |
| 1935 Residence (City) | Colfax Twp. |
| 1935 Residence (County) | Boone |
| Income (1939) | 0 |
| Highest Grade | No 8 |
| 1935 Residence | Same House |
| 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 Emma Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Emma Cooper
Spouse · 1940 · age 63 · b. ~1877 · 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 — Boone-County, Iowa
Open full size
1940 US Federal Census — Boone-County, Iowa
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01141-00115)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Walter D. Keefe | 54 | Head | Farmer | Iowa |
| 42 | Clara E. Keefe | 35 | Wife | — | Iowa |
| 43 | Dorell Keefe | 24 | Son | Farm Laborer | Iowa |
| 44 | M. J. Morrissey | 56 | Head | Farmer | Illinois |
| 45 | Agnes B. Morrissey | 53 | Wife | — | Colorado |
| 46 | Joseph Morrissey | 25 | Son | Farm Laborer | Iowa |
| 47 | John Morrissey | 19 | Son | Farm Laborer | Iowa |
| 48 | Rita Morrissey | 17 | Daughter | — | Iowa |
| 49 | Benjamin Morrissey | 15 | Son | — | Iowa |
| 50 | C. V. Cooper | 59 | Head | Farmer | Iowa |
| 51 | Anna J. Cooper | 50 | Wife | — | Colorado |
| 52 | Margaret Cooper | 26 | Daughter | — | Iowa |
| 53 | Richard J. Cooper | 21 | Son | Farm Laborer | Iowa |
| 54 | James Cooper | 19 | Son | — | Iowa |
| 55 | Clarence J. Cooper | 17 | Son | — | Iowa |
| 56 | Mary Cooper | 15 | Daughter | — | Iowa |
| 57 | Gay L. Walker | 41 | Head | Farmer | Iowa |
| 58 | Opal D. Walker | 41 | Wife | — | Iowa |
| 59 | Mildred Walker | 12 | Daughter | — | Iowa |
| 60 | Donald Bates | 19 | Hired Hand | New Worker | Iowa |
| 61 | L. T. Holbert | 29 | Head | Farmer | Missouri |
| 62 | Sylvia Holbert | 26 | Wife | Laborer | Iowa |
| 63 | Janet Ann Holbert | 1 | Daughter | — | Iowa |
| 64 | L. C. Cries | 50 | Hired man | Laborer | — |
| 65 | John G. Cooper | 64 | Head | Farmer | Iowa |
| 66 | Emma Cooper THIS PERSON | 63 | Wife | — | Iowa |
| 67 | Edwin Cooper | 26 | Son | Farmer | Iowa |
| 68 | Susan Leininger | 88 | Mother-in-law | — | Illinois |
| 69 | Wilford Krabbe | 28 | Hired man | Laborer | Nebraska |
| 70 | Donald Butterfield | 12 | Hired man | — | Nebraska |
| 71 | Frank E. Davis | 35 | Head | Farmer | Iowa |
| 72 | Carrie Davis | 34 | Wife | Stenographer | Iowa |
| 73 | Austin Thromme | 62 | Head | Farmer | Norway |
| 74 | Belle Thromme | 55 | Wife | — | Norway |
| 75 | Margaret Thromme | 21 | Daughter | Typist | Iowa |
| 76 | Robert Thromme | 15 | Son | — | Iowa |
| 77 | Austin Jr. Thromme | 13 | Son | — | Iowa |
| 78 | Arnold Thromme | 23 | Son | — | Iowa |
| 79 | Laurence Lane | 22 | Hired man | Laborer | Missouri |
| 80 | H. C. Aaberg | 36 | Head | Livestock Marketing | Nebraska |
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)