JM
John Mccarthy — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Mccarthy across the 1900, 1910, 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a head (b.~1860), then head of a 5-person household.
Age 70
b. ~1860
Male
Head
Born: Massachusetts
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | McCarthy |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 22 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 8500 |
| Radio Set | R |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Everett City Of |
| Est. Birth Year | ~1860 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Helen Mccarthy | Daughter | — | 42 | ~1888 |
| John Mccarthy | Head | — | 70 | ~1860 |
| Mary Mccarthy | Other | — | 69 | ~1861 |
| Gerald Mccarthy | Son | — | 36 | ~1894 |
| John Mccarthy | Son | — | 40 | ~1890 |
Census Appearances
1900
Middlesex, Massachusetts
Head, age 38
Middlesex, Massachusetts · implied b. ~1862 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Birth Month | May |
| Birth Year | 1862 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Druggist |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1910
Middlesex, Massachusetts
Head, age 49
Middlesex, Massachusetts · implied b. ~1861 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 49 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Years Married | 7 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Druggist |
| Industry | Drug Store |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1920
Middlesex, Massachusetts
Head, age 58
Middlesex, Massachusetts · implied b. ~1862 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | McCarthy |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 58 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Druggist |
| Industry | Own Store |
| Class of Worker | Em |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Head, age 70
Middlesex, Massachusetts · implied b. ~1860 — 5 household members
| Surname | McCarthy |
| Given Name | John J. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 70 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 22 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 8500 |
| Radio Set | R |
| 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 John Mccarthy across 4 US Census years (1900, 1910, 1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
John Mccarthy
Head · 1930 · age 70 · b. ~1860 · Massachusetts
★ You are viewing this record
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
50 people indexed on this census page (ia:1930:massachusettscensus00reel918:0702)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Sam Rossi | 45 | Head | — | Italy |
| 2 | Dorothy Rossi | 36 | Wife | — | Massachusetts |
| 3 | Mary P. Bartlett | 52 | Head-H | — | Massachusetts |
| 4 | Mary E. Bartlett | 26 | Daughter | Stenographer | Massachusetts |
| 5 | Gertrude H. Bartlett | 22 | Daughter | Bookkeeper | Massachusetts |
| 6 | Eleanor A. Bartlett | 20 | Daughter | Stenographer | Massachusetts |
| 7 | Dennis Palmer | 33 | Head | Fish Cutter | Newfoundland |
| 8 | Elizabeth Palmer | 33 | Wife | — | Newfoundland |
| 9 | Charles D. Palmer | 10 | Son | — | Massachusetts |
| 10 | Dorothy M. Palmer | 8 | Daughter | — | Massachusetts |
| 11 | Benjamin Harding | 38 | Head-H | Clerk | Newfoundland |
| 12 | Mildred Harding | 32 | Wife-H | — | Newfoundland |
| 13 | Margaret Harding | 2 | Daughter | — | Massachusetts |
| 14 | William H. King | 20 | Brother | Fish Cutter | Newfoundland |
| 15 | James King | 18 | Brother | Laborer | Newfoundland |
| 16 | Thomas Bradley | 35 | Head | Laborer | Ireland |
| 17 | Annie Bradley | 35 | Wife-H | — | Ireland |
| 18 | Annie J. Bradley | 10 | Daughter | — | Massachusetts |
| 19 | Mary Bradley | 8 | Daughter | — | Massachusetts |
| 20 | John Belczyk | 42 | Head | — | Poland |
| 21 | Stella Belczyk | 38 | Wife-H | — | Poland |
| 22 | Helen Belczyk | 15 | Daughter | — | Massachusetts |
| 23 | Joseph L. Childs | 59 | Head | Foreman | Massachusetts |
| 24 | Helen G. Childs | 54 | Wife-H | — | Massachusetts |
| 25 | Joseph L. Childs | 30 | Son | — | Massachusetts |
| 26 | John J. Mccarthy THIS PERSON | 70 | Head | — | Massachusetts |
| 27 | Mary A. Mccarthy | 69 | Wife-H | — | Massachusetts |
| 28 | Helen B. Mccarthy | 42 | Daughter | — | Massachusetts |
| 29 | John J. Mccarthy | 40 | Son | — | Massachusetts |
| 30 | Gerald J. Mccarthy | 36 | Son | Foreman | Massachusetts |
| 31 | Nelson Sherman | 49 | Head | Foreman | Massachusetts |
| 32 | Sarah J. Sherman | 48 | Wife-H | — | Massachusetts |
| 33 | Frank J. Sherman | 15 | Son | — | Massachusetts |
| 34 | Ruth Sherman | 5 | Daughter | — | Massachusetts |
| 35 | Andrew Hines | 34 | Head | Foreman | Newfoundland |
| 36 | Mary Hines | 34 | Wife-H | — | Newfoundland |
| 37 | Andrew Hines | 13 | Son | — | Massachusetts |
| 38 | Phyllis Hines | 12 | Daughter | — | Massachusetts |
| 39 | Thomas Barr | 57 | Head | — | Rhode Island |
| 40 | Anna A. Barr | 46 | Wife-H | — | Newfoundland |
| 41 | George Long | 49 | Head | Plumber | Newfoundland |
| 42 | Elizabeth Long | 52 | Wife-H | — | Newfoundland |
| 43 | Alfred Long | 22 | Son | Electrician | Massachusetts |
| 44 | Jacob Thistle | 35 | Head | Floor Finisher | Newfoundland |
| 45 | Alice Thistle | 33 | Wife-H | — | Newfoundland |
| 46 | Jacob Thistle | 14 | Son | — | Massachusetts |
| 47 | Stanley L. Thistle | 12 | Son | — | Massachusetts |
| 48 | Dorothy Thistle | 10 | Daughter | — | Massachusetts |
| 49 | Frederick P. Langford | 54 | Head | Foreman | Newfoundland |
| 50 | Mary M. Langford | 56 | Wife-H | — | Newfoundland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)