HC
Harry Campbell — 1940 US Census Record
Model Tree available1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Harry Campbell across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed), with identified parents Charles & Jeanette — first a son (b.~1877), then head of a 5-person household.
Age 63
b. ~1877
Male
Son
Born: Massachusetts
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Campbell |
| Given Name | Harry H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Occupation | laundry agent |
| Industry | laundry |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 270 |
| Highest Grade | C-4 |
| 1935 Residence | Same Place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Occupation | Laundry Agent |
| Township / Ward | Medford City |
| Est. Birth Year | ~1877 |
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.
5 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Harry | Age | Birth yr |
|---|---|---|---|---|
| Jeanette Campbell | Head | — | 83 | ~1857 |
| Ray Campbell | Son | — | 45 | ~1895 |
| William Campbell | Son | — | 63 | ~1877 |
| Jessie Larkin | Daughter | — | 57 | ~1883 |
| Harry Campbell | Son | — | 63 | ~1877 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 43
Middlesex, Massachusetts · implied b. ~1877 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Harry H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Laundry agent |
| Industry | Laundry Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 53
Middlesex, Massachusetts · implied b. ~1877 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Harry H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 53 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | Agent |
| Industry | Laundry |
| Class of Worker | W |
| Can Read/Write | Yes |
| Veteran | No |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Son, age 63
Middlesex-County, Massachusetts · implied b. ~1877 — 5 household members
| Surname | Campbell |
| Given Name | Harry H. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 63 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Occupation | laundry agent |
| Industry | laundry |
| Class of Worker | PW |
| Hours Worked | 20 |
| Income (1939) | 270 |
| Highest Grade | C-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 Harry Campbell across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Charles Campbell (~0.92 confidence) and mother Jeanette Campbell (~0.92 confidence). The pedigree spans 1 generation with 2 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Charles Campbell
b. ~1856
Source father
● Household
· direct · ~0.92
Mother
Jeanette Campbell
b. ~1857
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Harry Campbell
Son · 1940 · age 63 · b. ~1877 · Massachusetts
★ You are viewing this record
Sibling
Ray Campbell
Sibling · 1940 · age 45
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jessie Larkin
Sibling · 1940 · age 57
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Campbell
Sibling · 1940 · age 63
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-t0627-01611-00321)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Joseph A. Murphy | 43 | Head | Laborer | Massachusetts |
| 2 | Christina A. Murphy | 36 | Wife | — | Massachusetts |
| 3 | Christina C. Murphy | 19 | Daughter | New Worker | Massachusetts |
| 4 | Joseph A. Jr. Murphy | 4 | Son | — | Massachusetts |
| 5 | Peter J. Brown | 33 | Head | Laborer | Massachusetts |
| 6 | Antoinette Brown | 32 | Wife | — | Massachusetts |
| 7 | Chester Brown | 12 | Son | — | Massachusetts |
| 8 | Raymond Brown | 9 | Son | — | Massachusetts |
| 9 | Peter Sigismundi | 56 | Head | Laborer | Italy |
| 10 | Antoinette Sigismundi | 59 | Wife | — | Italy |
| 11 | Nicholas Sigismundi | 18 | Son | — | Massachusetts |
| 12 | Ameen Solmon | 43 | Head | — | Syria |
| 13 | Annie Solmon | 16 | Daughter | Seamstress | Massachusetts |
| 14 | Robert Sgueglia | 71 | Head | — | Italy |
| 15 | Bertha Sgueglia | 47 | Wife | — | Vermont |
| 16 | George H. Doherty | 24 | Head | Cook | Massachusetts |
| 17 | Lillian M. Doherty | 20 | Sister | Salesgirl | Massachusetts |
| 18 | Eliza M. Boynton | 59 | Head | — | Maine |
| 19 | Gertrude A. Cassidy | 32 | Head | — | Canada-English |
| 20 | Leonard Cassidy | 3 | Son | — | Massachusetts |
| 21 | Howard W. Plett | 41 | Head | Bus Operator | Massachusetts |
| 22 | Francis M. Plett | 36 | Wife | — | Massachusetts |
| 23 | Edwin A. Fuller | 32 | Head | Accountant | Massachusetts |
| 24 | Lilla M. Fuller | 27 | Wife | — | Massachusetts |
| 25 | Marilyn J. Fuller | 5 | Daughter | — | Massachusetts |
| 26 | Charles F. Fuller | 2 | Son | — | Massachusetts |
| 27 | Lilla H. Curtis | 78 | Mother-law | — | Vermont |
| 28 | Mary E. O'Brien | 49 | Head | Secretary | Massachusetts |
| 29 | Margaret C. O'Brien | 54 | Sister | Clerk | Massachusetts |
| 30 | Julia T. O'Brien | 53 | Sister | — | Massachusetts |
| 31 | Bridget O'Brien | 74 | Mother | — | Irish Free State |
| 32 | Jeanette F. Campbell | 83 | Head | — | Massachusetts |
| 33 | Harry H. Campbell THIS PERSON | 63 | Son | Laundry Agent | Massachusetts |
| 34 | William H. Campbell | 63 | Son | Church Sexton | Massachusetts |
| 35 | Ray S. Campbell | 45 | Son | Shipping Clerk | Massachusetts |
| 36 | Jessie C. Larkin | 57 | Daughter | — | Massachusetts |
| 37 | George R. Stormont | 35 | Head | Foreman | Scotland |
| 38 | Jennie S. Stormont | 37 | Wife | — | Canada-English |
| 39 | Margaret E. Stormont | 16 | Daughter | — | Massachusetts |
| 40 | Veva T. Stormont | 15 | Daughter | — | Massachusetts |
Related Census Records
Pedigree Summary
Harry + 3 siblings
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)