HC
Helen Cooper — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Helen Cooper across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Walter & Walter — first a spouse (b.~1918), then head of a 3-person household.
Age 22
b. ~1918
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Cooper |
| Given Name | Helen D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Medford 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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Helen | Age | Birth yr |
|---|---|---|---|---|
| Walter Cooper | Head | — | 23 | ~1917 |
| Helen Cooper | Spouse | — | 22 | ~1918 |
| Walter Cooper | Son | — | 1 | ~1939 |
Census Appearances
1920
Middlesex, Massachusetts
Daughter, age 3
Middlesex, Massachusetts · implied b. ~1917 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Helena |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Daughter, age 12
Middlesex, Massachusetts · implied b. ~1918 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Cooper |
| Given Name | Helen M. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | Black |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | North Carolina |
| Mother's Birthplace | Massachusetts |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 22
Middlesex-County, Massachusetts · implied b. ~1918 — 3 household members
| Surname | Cooper |
| Given Name | Helen D. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 22 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Highest Grade | Hs 3 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
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 Helen Cooper across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Walter Cooper (~0.92 confidence) and father Walter Cooper (~0.92 confidence) and mother Claretta Cooper (~0.92 confidence) and mother Olivette Cooper (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Walter Cooper
b. ~1886
Source father
● Household
· direct · ~0.92
Father
Walter Cooper
b. ~1899
Source father
● Household
· direct · ~0.92
Mother
Claretta Cooper
b. ~1888
Source mother
● Household
· direct · ~0.92
Mother
Olivette Cooper
b. ~1896
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Cooper
Spouse · 1940 · age 22 · b. ~1918 · Massachusetts
★ 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 — Middlesex-County, Massachusetts
Open full size
1940 US Federal Census — Middlesex-County, Massachusetts
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01612-00723)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Elbra Smith | 16 | daughter | — | Massachusetts |
| 42 | Ellsworth Smith | 14 | son | — | Massachusetts |
| 43 | Ogden Smith | 12 | son | — | Massachusetts |
| 44 | Doris Smith | 10 | daughter | — | Massachusetts |
| 45 | June Smith | 7 | daughter | — | Massachusetts |
| 46 | Charles Smith | 5 | son | — | Massachusetts |
| 47 | Harold Chipman | 63 | Head | Manager | Canada |
| 48 | Helen Chipman | 62 | wife | — | New York |
| 49 | Robert V. Chipman | 24 | son | Office Clerk | Massachusetts |
| 50 | Lillian H. Leary | 52 | Head | — | Massachusetts |
| 51 | Alice M. Leary | 24 | daughter | Secretary | Massachusetts |
| 52 | Joan E. Leary | 14 | daughter | — | Massachusetts |
| 53 | Constance Contestable | 25 | daughter | — | Massachusetts |
| 54 | Richard P. Contestable | 22 | son-in-law | Statistical Clerk | Massachusetts |
| 55 | Edward J. Myser | 50 | Head | Dealer | Massachusetts |
| 56 | Mildred E. Myser | 47 | Wife | — | Massachusetts |
| 57 | Herman Myser | 22 | son | — | Massachusetts |
| 58 | Mariam Myser | 15 | daughter | — | Massachusetts |
| 59 | Leroy B. Leahony | Leahany | 50 | Head | Paymaster | Massachusetts |
| 60 | Mary E. Leahony | Leahany | 51 | Wife | — | Massachusetts |
| 61 | Marjorie Leahony | Leahany | 22 | daughter | Filing Clerk | Massachusetts |
| 62 | Howard Leahony | Leahany | 13 | son | — | Massachusetts |
| 63 | Walter C. Cooper | 23 | Head | Salesman | New Jersey |
| 64 | Helen D. Cooper THIS PERSON | 22 | Wife | — | Massachusetts |
| 65 | Walter M. Cooper | 1 | son | — | Massachusetts |
| 66 | Harry B. Kakas | 55 | Head | Furrier | Massachusetts |
| 67 | Helen S. Kakas | 53 | wife | — | Massachusetts |
| 68 | Janet D. Clark | 56 | Head | — | England |
| 69 | Ruth Clark | 32 | daughter | Secretary | Massachusetts |
| 70 | Doris E. Clark | 26 | daughter | Nurse | Massachusetts |
| 71 | Willard D. Clark | 22 | son | — | Massachusetts |
| 72 | Roy A. Kennan | 56 | Head | Conductor | Massachusetts |
| 73 | Josephine Kennan | 54 | Wife | — | Canada |
| 74 | Irma L. Kennan | 25 | daughter | Bookkeeper | Massachusetts |
| 75 | Roy A. Kennan | 18 | son | — | Massachusetts |
| 76 | Ronald Day | 48 | Head | Personnel | New Hampshire |
| 77 | Selma D. Day | 45 | wife | — | Massachusetts |
| 78 | Marilyn Day | 17 | daughter | — | Massachusetts |
| 79 | Roger Day | 11 | son | — | Massachusetts |
| 80 | John Day | 8 | son | — | Massachusetts |
Pedigree Summary
Helen
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)