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Helen Mason — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Helen Mason across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Harry & Julia — first a spouse (b.~1910), then head of a 3-person household.
Age 30
b. ~1910
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Mason |
| Given Name | Helen |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brookline |
| 1935 Residence (County) | Norfolk |
| Additional Details | |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Cambridge |
| Est. Birth Year | ~1910 |
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 |
|---|---|---|---|---|
| Carolyn Mason | Daughter | — | 1 | ~1939 |
| Robert Mason | Head | — | 31 | ~1909 |
| Helen Mason | Spouse | — | 30 | ~1910 |
Census Appearances
1920
Worcester, Massachusetts
Daughter, age 8
Worcester, Massachusetts · implied b. ~1912 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Helen V |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 8 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Worcester, Massachusetts
Daughter, age 19
Worcester, Massachusetts · implied b. ~1911 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Mason |
| Given Name | Helen M. |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 19 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Irish Free State |
| Occupation | spinner |
| Industry | Carpet mill |
| Class of Worker | W |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 30
Middlesex-County, Massachusetts · implied b. ~1910 — 3 household members
| Surname | Mason |
| Given Name | Helen |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 30 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Brookline |
| 1935 Residence (County) | Norfolk |
| Class of Worker | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Massachusetts |
| 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 Mason across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Mason (~0.92 confidence) and mother Julia Mason (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Mason
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Julia Mason
b. ~1887
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Helen Mason
Spouse · 1940 · age 30 · b. ~1910 · 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-t0627-01686-00016)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fred Jr. Hillis | 5 | Head | — | Connecticut |
| 2 | Gertie Mcneil | 63 | Cook | Cook | Canada English |
| 3 | Myrtle Voaler | 60 | Maid | Maid | Canada English |
| 4 | Vera Rignas | 52 | Maid | Maid | Norway |
| 5 | Paul R. Corcoran | 40 | Head | Part-Owner | Massachusetts |
| 6 | Katherine Corcoran | 38 | Wife | — | Massachusetts |
| 7 | Ann Corcoran | 12 | Daughter | — | Massachusetts |
| 8 | Mary Corcoran | 9 | Daughter | — | Massachusetts |
| 9 | Jane M. Corcoran | 8 | Daughter | — | Massachusetts |
| 10 | Dennis Corcoran | 2 | Son | — | Massachusetts |
| 11 | Ellen Corcoran | 0 | Daughter | 0 | Massachusetts |
| 12 | Nora Mccarthy | 75 | Maid | General Maid | Eire |
| 13 | Danielle Martin | 32 | Maid | Maid | Scotland |
| 14 | William Neill | 58 | Head | Naval Officer | West Virginia |
| 15 | Lydia Neill | 46 | Wife | — | Washington D.C. |
| 16 | Mary R. Neill | 21 | Daughter | Stenographer | Washington D.C. |
| 17 | Donald Neill | 15 | Son | — | Washington D.C. |
| 18 | Elizabeth Neill | 5 | Daughter | — | Washington D.C. |
| 19 | Ida Neill | 80 | Mother | — | West Virginia |
| 20 | Francis Riggs | 58 | Head | Retired | New York |
| 21 | Valerie Riggs | 55 | Wife | — | New York |
| 22 | Elizabeth Nicholson | 40 | Maid | General Maid | Canada English |
| 23 | Annie C. Jones | 89 | Head | — | Canada English |
| 24 | Priscilla O. Jones | 58 | Daughter | — | Massachusetts |
| 25 | Harriet M. Ross | 61 | Lodger | — | New York |
| 26 | Cordelia Cates | 45 | Maid | General Maid | Massachusetts |
| 27 | Charles H. Wortham | 34 | Head | Electrical Engineer | Massachusetts |
| 28 | Velma Wortham | 34 | Wife | — | Massachusetts |
| 29 | Cheryl Wortham | 4 | Daughter | — | Massachusetts |
| 30 | Mary Washington | 23 | Maid | General Maid | Georgia |
| 31 | Jesse G. Jr. Sumpter | 40 | Head | Salesmanager | Massachusetts |
| 32 | Nannie G. Sumpter | 34 | Wife | — | Australia |
| 33 | Charles Sumpter | 7 | Son | — | Massachusetts |
| 34 | Jesse G. 3Rd Sumpter | 2 | Son | — | Massachusetts |
| 35 | Alma Lefevre | 21 | Maid | General Maid | Maine |
| 36 | Gordon Flynn | 33 | Head | Underwriter | Wisconsin |
| 37 | Lydia Flynn | 31 | Wife | — | Massachusetts |
| 38 | Robert A. Mason | 31 | Head | Salesmanager | Massachusetts |
| 39 | Helen Mason THIS PERSON | 30 | Wife | — | Massachusetts |
| 40 | Carolyn Mason | 1 | Daughter | — | Massachusetts |
Related Census Records
Pedigree Summary
Helen
Gen 1 · 2 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)