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James Simpson — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this James Simpson across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1873), then head of a 3-person household.
Age 67
b. ~1873
Male
Head
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Simpson |
| Given Name | James B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | Fireman |
| Industry | City Fire Dept |
| Class of Worker | GW |
| Hours Worked | 42 |
| Income (1939) | 988 |
| Highest Grade | H 4 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Fireman |
| Township / Ward | Medford City |
| Est. Birth Year | ~1873 |
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 James | Age | Birth yr |
|---|---|---|---|---|
| Ivy Simpson | Daughter | — | 39 | ~1901 |
| James Simpson | Head | — | 67 | ~1873 |
| Christine Simpson | Spouse | — | 67 | ~1873 |
Census Appearances
1920
Middlesex, Massachusetts
Head, age 48
Middlesex, Massachusetts · implied b. ~1872 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | James B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Fireman |
| Industry | Fire Dept. |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | M |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Head, age 57
Middlesex, Massachusetts · implied b. ~1873 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Simpson |
| Given Name | James B |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 57 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 25 |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Occupation | Fireman |
| Industry | City Fire Dept |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 7500 |
| Radio Set | R |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Head, age 67
Middlesex-County, Massachusetts · implied b. ~1873 — 3 household members
| Surname | Simpson |
| Given Name | James B. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 67 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Occupation | Fireman |
| Industry | City Fire Dept |
| Class of Worker | GW |
| Hours Worked | 42 |
| Income (1939) | 988 |
| 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 Simpson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
James Simpson
Head · 1940 · age 67 · b. ~1873 · Massachusetts
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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-t0627-01611-00182)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Frank J. Carroll | 43 | Head | Gas Welder | Massachusetts |
| 42 | Hazel L. Carroll | 42 | Wife | — | Massachusetts |
| 43 | Helen R. Carroll | 22 | Daughter | Candy Packer | Massachusetts |
| 44 | Alfred L. Carroll | 20 | Son | New Worker | Massachusetts |
| 45 | Frank L. Jr. Carroll | 18 | Son | Sailor | Massachusetts |
| 46 | Hazel F. Carroll | 17 | Daughter | — | Massachusetts |
| 47 | Creighton A. Carroll | 14 | Son | — | Massachusetts |
| 48 | John E. Carroll | 12 | Son | — | Massachusetts |
| 49 | William R. Carroll | 9 | Son | — | Massachusetts |
| 50 | Bette L. Carroll | 6 | Daughter | — | Massachusetts |
| 51 | Dorothy J. Carroll | 3 | Daughter | — | Massachusetts |
| 52 | Tillinghast W. Wyman | 66 | Head | Watch Repairer | Massachusetts |
| 53 | Annabelle C. Wyman | 65 | Wife | — | Canada English |
| 54 | William Randolph Whitney | 33 | Son in law | Stationary Engineer | Massachusetts |
| 55 | Alice Hope Whitney | 31 | Daughter | — | Massachusetts |
| 56 | Pauline H. Whitney | 6 | Granddaughter | — | Massachusetts |
| 57 | Mariano Ippolito | 53 | Head | Janitor | Italy |
| 58 | Mary Ippolito | 48 | Wife | — | Italy |
| 59 | Pasquale Ippolito | 25 | Son | Projection Operator | Massachusetts |
| 60 | Joseph Ippolito | 23 | Son | Attendant | Massachusetts |
| 61 | George N. Watson | 48 | Head | Nickel Plater | Massachusetts |
| 62 | Mabel L. Watson | 46 | Wife | — | Massachusetts |
| 63 | Alice L. Downes | 84 | Mother in law | — | New York |
| 64 | James B. Simpson THIS PERSON | 67 | Head | Fireman | Massachusetts |
| 65 | Christine Simpson | 67 | Wife | — | Massachusetts |
| 66 | Ivy E. Simpson | 39 | Daughter | — | Massachusetts |
| 67 | Charles Mcglenn | 63 | Head | Bricklayer | Scotland |
| 68 | John Mcglenn | 26 | Son | Driver Salesman | Massachusetts |
| 69 | Alice Mcglenn | 24 | Daughter | Operator | Massachusetts |
| 70 | Margaret Mcglenn | 20 | Daughter | — | Massachusetts |
| 71 | Eunice Mcglenn | 16 | Daughter | — | Massachusetts |
| 72 | Barbara Mcglenn | 14 | Daughter | — | Massachusetts |
| 73 | Theodore R. Clarke | 33 | Head | Teller | Massachusetts |
| 74 | Muriel B. Clarke | 30 | Wife | — | Massachusetts |
| 75 | Theodore C. Clarke | 8 | Son | — | Massachusetts |
| 76 | Donald W. Clarke | 4 | Son | — | Massachusetts |
| 77 | Richard A. Clarke | 1 | Son | — | Massachusetts |
| 78 | Richard H. Loughlin | 52 | Head | Policeman | Massachusetts |
| 79 | Mary E. Loughlin | 39 | Wife | — | Massachusetts |
| 80 | Richard Loughlin | 10 | Son | — | 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)