MC
Martha Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Helena-County, Louisiana
Our Model Tree links this Martha Cooper across the 1930 and 1940 US Censuses in St.-Helena-County, Louisiana (XGBoost, ~Confirmed) — first a daughter (b.~1914), then head of a 6-person household.
Age 26
b. ~1914
Female
Daughter
Born: Louisiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Helena-County, Louisiana |
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | Ward 2 |
| 1935 Residence (County) | St. Helena |
| Additional Details | |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Louisiana |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
| Occupation | Laborer |
| Township / Ward | Ward 2 |
| Est. Birth Year | ~1914 |
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 Martha | Age | Birth yr |
|---|---|---|---|---|
| Nancy Cooper | Spouse | — | 53 | ~1887 |
| Bertha Cooper | Daughter | — | 29 | ~1911 |
| Willie Cooper | Other | — | 6 | ~1934 |
| Charlie Cooper | Head | — | 54 | ~1886 |
| James Cooper | Son | — | 16 | ~1924 |
| Martha Cooper | Daughter | — | 26 | ~1914 |
Census Appearances
1930
St Helena, …
Daughter, age 16
St Helena, Louisiana · implied b. ~1914 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Louisiana |
| Father's Birthplace | Louisiana |
| Mother's Birthplace | Louisiana |
| Can Read/Write | Yes |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
1940
St.-Helena-County, Louisiana
Daughter, age 26
St.-Helena-County, Louisiana · implied b. ~1914 — 6 household members
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 26 |
| Marital Status | Single |
| Birthplace | Louisiana |
| 1935 Residence (City) | Ward 2 |
| 1935 Residence (County) | St. Helena |
| Occupation | Laborer |
| Industry | Farm |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 0 |
| Highest Grade | No 5 |
| 1935 Residence | Louisiana |
| Birth State | Louisiana |
| Birth Country | United States |
| Birthplace (normalized) | louisiana |
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 Martha Cooper across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Martha Cooper
Daughter · 1940 · age 26 · b. ~1914 · Louisiana
★ You are viewing this record
Sibling
Bertha Cooper
Sibling · 1940 · age 29
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Cooper
Sibling · 1940 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — St.-Helena-County, Louisiana
Open full size
1940 US Federal Census — St.-Helena-County, Louisiana
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01448-00047)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Oscar Hutchinson | 32 | Head | Laborer | Louisiana |
| 2 | Mary Hutchinson | 27 | Wife | Teacher | Louisiana |
| 3 | Gilda A Hutchinson | 5 | Daughter | — | Louisiana |
| 4 | Charlie Cooper | 54 | Head | Farmer | Louisiana |
| 5 | Nancy Cooper | 53 | Wife | — | Louisiana |
| 6 | Bertha Cooper | 29 | Daughter | Laborer | Louisiana |
| 7 | Martha Cooper THIS PERSON | 26 | Daughter | Laborer | Louisiana |
| 8 | James Cooper | 16 | Son | Laborer | Louisiana |
| 9 | Willie M Cooper | 6 | Granddaughter | — | Louisiana |
| 10 | Leonard Hutchinson | 55 | Head | Farmer | Louisiana |
| 11 | Eula D Hutchinson | 18 | Daughter | Teacher | Louisiana |
| 12 | Alonzo Cooper | 31 | Head | Farmer | Louisiana |
| 13 | Eddie B Cooper | 24 | Brother | Laborer | Louisiana |
| 14 | Samuel Randle | 36 | Head | Laborer | Louisiana |
| 15 | Ella Randle | 30 | Wife | — | Louisiana |
| 16 | Leola Randle | 5 | Daughter | — | Louisiana |
| 17 | Samuel Jr Randle | 2 | Son | — | Louisiana |
| 18 | Cleon Hutchinson | 35 | Head | Laborer | Louisiana |
| 19 | Mattie Hutchinson | 34 | Wife | — | Louisiana |
| 20 | Doris Hutchinson | 13 | Daughter | — | Louisiana |
| 21 | Cleon Jr Hutchinson | 6 | Son | — | Louisiana |
| 22 | Irving Womack | 28 | Head | Farmer | Louisiana |
| 23 | Lula Womack | 24 | Wife | — | Louisiana |
| 24 | Vernell Womack | 6 | Son | — | Louisiana |
| 25 | Catherine Womack | 4 | Daughter | — | Louisiana |
| 26 | Viola Womack | 4 | Daughter | — | Louisiana |
| 27 | Elaine Womack | 2 | Daughter | — | Louisiana |
| 28 | John D Womack | 35 | Head | Farmer | Louisiana |
| 29 | Katie Womack | 35 | Wife | — | Louisiana |
| 30 | Pearl Womack | 26 | Daughter | — | Louisiana |
| 31 | Lizzie Womack | 16 | Daughter | Cook | Louisiana |
| 32 | Vernell J Womack | 14 | Son | — | Louisiana |
| 33 | Shirley Womack | 12 | Son | — | Louisiana |
| 34 | Cara Dee Womack | 2 | Daughter | — | Louisiana |
| 35 | Wilma Cooper | 20 | Daughter | — | Louisiana |
| 36 | Mary D Cooper | 1 | Daughter | — | Louisiana |
| 37 | Columbus J Lilley | 35 | Head | Carpenter | Louisiana |
| 38 | Ionell Lilley | 24 | Wife | Helper | Louisiana |
| 39 | Hugh Yarborough | 52 | Head | Farmer | Louisiana |
| 40 | Susie Yarborough | 47 | Wife | Teacher | Louisiana |
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)