MC
Martha Cooper — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Dallas-County, Texas
Our Model Tree links this Martha Cooper across the 1930 and 1940 US Censuses in Dallas-County, Texas (XGBoost, ~Confirmed) — first a daughter (b.~1918), then head of a 6-person household.
Age 22
b. ~1918
Female
Daughter
Born: Texas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Dallas-County, Texas |
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Ocean City |
| 1935 Residence (County) | Dallas |
| Additional Details | |
| Industry | No |
| Class of Worker | No |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
| Township / Ward | Ocean City |
| Est. Birth Year | ~1918 |
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 |
|---|---|---|---|---|
| La Cooper | Son | — | 13 | ~1927 |
| Warren Cooper | Son | — | 20 | ~1920 |
| Maggie Cooper | Spouse | — | 45 | ~1895 |
| Martha Cooper | Daughter | — | 22 | ~1918 |
| George Cooper | Head | — | 47 | ~1893 |
| Jean Cooper | Daughter | — | 18 | ~1922 |
Census Appearances
1930
Dallas, Texas
Other, age 10
Dallas, Texas · implied b. ~1920 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Granddaughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Texas |
| Father's Birthplace | Texas |
| Mother's Birthplace | Texas |
| Can Read/Write | Yes |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
1940
Dallas-County, Texas
Daughter, age 22
Dallas-County, Texas · implied b. ~1918 — 6 household members
| Surname | Cooper |
| Given Name | Martha |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Single |
| Birthplace | Texas |
| 1935 Residence (City) | Ocean City |
| 1935 Residence (County) | Dallas |
| Industry | No |
| Class of Worker | No |
| Highest Grade | H-4 |
| 1935 Residence | Same place |
| Birth State | Texas |
| Birth Country | United States |
| Birthplace (normalized) | texas |
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 22 · b. ~1918 · Texas
★ You are viewing this record
Sibling
La Cooper
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Cooper
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Warren Cooper
Sibling · 1940 · age 20
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 — Dallas-County, Texas
Open full size
1940 US Federal Census — Dallas-County, Texas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04179-00347)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | A. Clarence Williams | 32 | Head | Foreman | Texas |
| 2 | Mary Lou Williams | 31 | Wife | — | Oklahoma |
| 3 | Robert F. Mc Kee | 18 | Bro-in-law | No | Oklahoma |
| 4 | Henry G. Merritt | 31 | Head | Asbestos Worker | Oklahoma |
| 5 | Nell Merritt | 29 | Wife | — | Texas |
| 6 | James Caldwell | 45 | Head | Salesman | Texas |
| 7 | Elizabeth Caldwell | 39 | Wife | — | Texas |
| 8 | Jamie E. Caldwell | 13 | Daughter | — | Texas |
| 9 | Betty Ruth Caldwell | 9 | Daughter | — | Texas |
| 10 | Ray Wier | 46 | Head | — | Texas |
| 11 | Madeline Wier | 40 | Wife | — | Texas |
| 12 | Kathleen Wier | 17 | Daughter | — | Texas |
| 13 | Ray W. Wier | 15 | Son | — | Texas |
| 14 | Bob Eddie Wier | 5 | Son | — | Texas |
| 15 | Henry F. Hibbits | 80 | Father in law | — | Kentucky |
| 16 | Keith Lyden | 17 | Lodger | Delivery Boy | Texas |
| 17 | Hugh Lowry | 60 | Lodger | — | Tennessee |
| 18 | Sidney W. Nowlin | 69 | Head | Pharmacist | Tennessee |
| 19 | Sally P. Nowlin | 68 | Wife | — | Mississippi |
| 20 | Warren Nowlin | 34 | Son | Mechanic & Drafting Engnr | Texas |
| 21 | Warda W. Connolly | 40 | Lodger | Comptometer Operator | Texas |
| 22 | Sue Ann Connolly | 16 | Lodger | — | Texas |
| 23 | George E. Cooper | 47 | Head | Laborer | Texas |
| 24 | Maggie Cooper | 45 | Wife | — | Texas |
| 25 | Warren Cooper | 20 | Son | Copy Boy | Texas |
| 26 | Martha Cooper THIS PERSON | 22 | Daughter | — | Texas |
| 27 | Jean Cooper | 18 | Daughter | — | Texas |
| 28 | La Max Cooper | 13 | Son | — | Texas |
| 29 | Maud Bolentine | 36 | Head | — | Texas |
| 30 | Claude Bolentine | 36 | Brother | Checker | Texas |
| 31 | Bernice Aindorf | 46 | Sister | Saleslady | Texas |
| 32 | Beverly Bolentine | 19 | Daughter | — | Arkansas |
| 33 | Bert Jr. Bolentine | 14 | Son | — | Texas |
| 34 | Sarah Ann Bolentine | 9 | Daughter | — | Texas |
| 35 | Charles M. Harvin | 48 | Head | Appraiser & Loan Officer | Texas |
| 36 | Beulah M. Harvin | 42 | Wife | — | Mississippi |
| 37 | Frances Harvin | 12 | Daughter | — | Texas |
| 38 | Lutie E. Burgess | 58 | Head | — | Mississippi |
| 39 | This Line Omitted In Error | None | — | — | — |
| 40 | Here Ends Block 27 | None | — | — | — |
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)