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James Crosby — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this James Crosby across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1920), then head of a 10-person household.
Age 20
b. ~1920
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Crosby |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Arlington Town |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Council Clerk |
| Industry | Town of Arlington |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 500 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Council Clerk |
| Township / Ward | Arlington Town |
| Est. Birth Year | ~1920 |
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.
10 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Thomas Crosby | Son | — | 17 | ~1923 |
| Mary Crosby | Daughter | — | 22 | ~1918 |
| James Crosby | Head | — | 50 | ~1890 |
| Rita Crosby | Daughter | — | 13 | ~1927 |
| Irene Crosby | Daughter | — | 12 | ~1928 |
| James Crosby | Son | — | 20 | ~1920 |
| Patricia Crosby | Daughter | — | 22 | ~1918 |
| Sally Crosby | Daughter | — | 10 | ~1930 |
| Annie Crosby | Spouse | — | 50 | ~1890 |
| Violet Crosby | Daughter | — | 19 | ~1921 |
Census Appearances
1930
Middlesex, Massachusetts
Son, age 10
Middlesex, Massachusetts · implied b. ~1920 — 9 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Crosby |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Canada English |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 20
Middlesex-County, Massachusetts · implied b. ~1920 — 10 household members
| Surname | Crosby |
| Given Name | James |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Arlington Town |
| 1935 Residence (County) | Middlesex |
| Occupation | Council Clerk |
| Industry | Town of Arlington |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 500 |
| Highest Grade | H 4 |
| 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 James Crosby across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
James Crosby
Son · 1940 · age 20 · b. ~1920 · Massachusetts
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Sibling
Mary Crosby
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Violet Crosby
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Crosby
Sibling · 1940 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Patricia Crosby
Sibling · 1940 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Irene Crosby
Sibling · 1940 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Sally Crosby
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Rita Crosby
Sibling · 1940 · age 13
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 — 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-t0627-01602-00201)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Allen C Jeffrey | 64 | Head | Clerk | Massachusetts |
| 2 | Mary Jeffrey | 58 | Wife | — | Massachusetts |
| 3 | Grace Jeffrey | 34 | Daughter | Buyer | Massachusetts |
| 4 | Harold Meyer | 46 | Head | Clerk | Massachusetts |
| 5 | Blanche Meyer | 45 | Wife | — | Massachusetts |
| 6 | Evelyn Meyer | 21 | Daughter | Stenographer | Massachusetts |
| 7 | Abaco Perry | 62 | Head | Yard Officer | Maine |
| 8 | Lizzie Perry | 53 | Wife | — | Pennsylvania |
| 9 | Robert C Clifford | 51 | Head | Manager | Massachusetts |
| 10 | Rebecca Clifford | 42 | Wife | — | Massachusetts |
| 11 | Edith Clifford | 17 | Daughter | — | Massachusetts |
| 12 | Warner Clifford | 24 | Son | Salesman | Massachusetts |
| 13 | Alfred Craft | 51 | Head | Proprietor | Canada |
| 14 | Daisy M Craft | 50 | Wife | — | Maine |
| 15 | Raymond Craft | 23 | Daughter | Secretary | Massachusetts |
| 16 | Albert O'Connell | 65 | Head | Salesman | Maine |
| 17 | Mary O'Connell | 59 | Wife | — | Maine |
| 18 | Doris O'Connell | 35 | Daughter | Stenographer | Maine |
| 19 | Nellie Cushing | 87 | Mother-in-law | — | Maine |
| 20 | James Crosby | 50 | Head | Laborer | Massachusetts |
| 21 | Annie Crosby | 50 | Wife | — | Massachusetts |
| 22 | Mary Crosby | 22 | Daughter | Laboratory | Massachusetts |
| 23 | Patricia Crosby | 22 | Daughter | Clerk | Massachusetts |
| 24 | James Crosby THIS PERSON | 20 | Son | Council Clerk | Massachusetts |
| 25 | Violet Crosby | 19 | Daughter | — | Massachusetts |
| 26 | Thomas Crosby | 17 | Son | — | Massachusetts |
| 27 | Rita Crosby | 13 | Daughter | — | Massachusetts |
| 28 | Irene Crosby | 12 | Daughter | — | Massachusetts |
| 29 | Sally Crosby | 10 | Daughter | — | Massachusetts |
| 30 | Helen Guiney | 40 | Head | — | Massachusetts |
| 31 | Helen Guiney | 17 | Daughter | — | Massachusetts |
| 32 | Bernice Guiney | 15 | Daughter | — | Massachusetts |
| 33 | Lorna Holman | 46 | Head | Manager | Canada |
| 34 | Evelyn Holman | 46 | Wife | — | Canada |
| 35 | Mary Holman | 20 | Daughter | Secretary | Canada |
| 36 | William Holman | 19 | Son | Clerk | Canada |
| 37 | Ruth Holman | 18 | Daughter | Secretary | Canada |
| 38 | Leo Macdonald | 41 | Head | Artist | Massachusetts |
| 39 | Alice Macdonald | 39 | Wife | — | Massachusetts |
| 40 | William Tennessee | 36 | Head | Printer | Massachusetts |
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)