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John Reilly — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Middlesex, Massachusetts
Our Model Tree links this John Reilly across the 1920 and 1930 US Censuses in Middlesex, Massachusetts (XGBoost, ~Confirmed) — first a son (b.~1915), then head of a 10-person household.
Age 15
b. ~1915
Male
Son
Born: Massachusetts
Single
1930 Census Record Details
| Census Year | 1930 |
| Location | Middlesex, Massachusetts |
| Surname | Reilly |
| Given Name | John E. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Additional Details | |
| Occupation | none |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Lowell City |
| Est. Birth Year | ~1915 |
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 1930 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Mary Reilly | Daughter | — | 2 | ~1928 |
| Helen Reilly | Daughter | — | 20 | ~1910 |
| Dorothy Reilly | Daughter | — | 6 | ~1924 |
| Mary Reilly | Daughter | — | 17 | ~1913 |
| James Reilly | Head | — | 51 | ~1879 |
| Mary Reilly | Other | — | 45 | ~1885 |
| James Reilly | Son | — | 22 | ~1908 |
| John Reilly | Son | — | 15 | ~1915 |
| Charles Reilly | Son | — | 12 | ~1918 |
| George Reilly | Son | — | 9 | ~1921 |
Census Appearances
1920
Middlesex, Massachusetts
Son, age 4
Middlesex, Massachusetts · implied b. ~1916 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Reilly |
| Given Name | John E. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 4 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1930
Middlesex, Massachusetts
Son, age 15
Middlesex, Massachusetts · implied b. ~1915 — 10 household members
| Surname | Reilly |
| Given Name | John E. |
| Relationship to Head | son |
| Sex | M |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Massachusetts |
| Father's Birthplace | Massachusetts |
| Mother's Birthplace | Massachusetts |
| Occupation | none |
| Can Read/Write | Yes |
| 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 Reilly across 2 US Census years (1920 and 1930) in Middlesex, Massachusetts, using XGBoost record linkage.
Show:
This person
Anchor record
John Reilly
Son · 1930 · age 15 · b. ~1915 · Massachusetts
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Sibling
George Reilly
Sibling · 1930 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Reilly
Sibling · 1930 · age 12
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Reilly
Sibling · 1930 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Reilly
Sibling · 1930 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
James Reilly
Sibling · 1930 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mary Reilly
Sibling · 1930 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Reilly
Sibling · 1930 · age 6
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
1930 US Federal Census — Middlesex, Massachusetts
Open full size
1930 US Federal Census — Middlesex, Massachusetts
Page Contents
30 people indexed on this census page (ia:1930:massachusettscensus00reel921:0702)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Clarissa Crowley | 33 | daughter | Stitcher | Massachusetts |
| 52 | Dennis Crowley | 67 | Head | Laborer | Irish Free State |
| 53 | Elizabeth Crowley | 56 | wife-H | None | Irish Free State |
| 54 | Alice G. Crowley | 26 | son | Clerk | Irish Free State |
| 55 | Elizabeth A. Crowley | 25 | daughter | Teacher | Irish Free State |
| 56 | Josephine Keefe | 53 | Head-H | Box Maker | Canada English |
| 57 | Elizabeth Keefe | 49 | sister | Box Maker | Canada English |
| 58 | Walter G. Burke | 44 | Head | Machinist | Massachusetts |
| 59 | Margaret Burke | 70 | mother | Laborer | Massachusetts |
| 60 | Lena M. Burke | 26 | sister-H | None | Massachusetts |
| 61 | James T. Reilly | 51 | Head | Sweeping | Massachusetts |
| 62 | Mary Reilly | 45 | wife-H | None | Massachusetts |
| 63 | James M. Reilly | 22 | son | Sweeping | Massachusetts |
| 64 | Helen A. Reilly | 20 | daughter | Machinist | Massachusetts |
| 65 | Mary T. Reilly | 17 | daughter | None | Massachusetts |
| 66 | John E. Reilly THIS PERSON | 15 | son | None | Massachusetts |
| 67 | Charles V. Reilly | 12 | son | None | Massachusetts |
| 68 | George F. Reilly | 9 | son | None | Massachusetts |
| 69 | Dorothy P. Reilly | 6 | daughter | None | Massachusetts |
| 70 | Mary R. Reilly | 2 | daughter | None | Massachusetts |
| 71 | Timothy J. Halloran | 55 | Head | Physician | Massachusetts |
| 72 | Alice M. Halloran | 55 | wife-H | None | Massachusetts |
| 73 | Joseph A. Gargan | 54 | brother-law | Machinist | Massachusetts |
| 74 | Helen T. Gargan | 29 | daughter | None | Massachusetts |
| 75 | Bridget T. O'Brien | 63 | Head-H | None | Massachusetts |
| 76 | Mary A. O'Brien | 29 | niece | Technician | Massachusetts |
| 77 | Catherine Hall | 58 | Head-H | None | Massachusetts |
| 78 | Thomas Hall | 28 | son | Bookkeeper | Massachusetts |
| 79 | Marion Hall | 26 | daughter | Compositor | Massachusetts |
| 80 | William R. Whalley | 20 | roomer | Cutter | Canada English |
Related Census Records
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)