MR
Mary Riley — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Riley across the 1920, 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1879), then head of a 3-person household.
Age 61
b. ~1879
Female
Spouse
Born: New Hampshire
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Riley |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Lowell |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
| Township / Ward | Lowell |
| Est. Birth Year | ~1879 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Thomas Riley | Head | — | 62 | ~1878 |
| Gerald Riley | Son | — | 23 | ~1917 |
| Mary Riley | Spouse | — | 61 | ~1879 |
Census Appearances
1920
Middlesex, Massachusetts
Spouse, age 40
Middlesex, Massachusetts · implied b. ~1880 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Riley |
| Given Name | Mary E. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1930
Middlesex, Massachusetts
Spouse, age 50
Middlesex, Massachusetts · implied b. ~1880 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Riley |
| Given Name | Mary C. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| Age at First Marriage | 30 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
1940
Middlesex-County, Massachusetts
Spouse, age 61
Middlesex-County, Massachusetts · implied b. ~1879 — 3 household members
| Surname | Riley |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | New Hampshire |
| 1935 Residence (City) | Lowell |
| 1935 Residence (County) | Middlesex |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | New Hampshire |
| Birth Country | United States |
| Birthplace (normalized) | new hampshire |
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 Mary Riley across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Riley
Spouse · 1940 · age 61 · b. ~1879 · 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-t0627-01694-00482)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Helen Lang | 21 | Niece | Clerical Work | Canada |
| 42 | — | None | — | — | — |
| 43 | James A Crowley | 49 | Head | Sail Maker | New York |
| 44 | Catherine F Crowley | 49 | Wife | — | Massachusetts |
| 45 | James V Crowley | 22 | Son | — | Massachusetts |
| 46 | William J Crowley | 19 | Son | — | Massachusetts |
| 47 | John F Crowley | 15 | Son | — | Massachusetts |
| 48 | Elizabeth Boehm | 42 | Head | Cook | Massachusetts |
| 49 | Paul Boehm | 19 | Son | Laborer | Massachusetts |
| 50 | Wm Brooks | 40 | Lodger | Clerk | New Hampshire |
| 51 | Fredrick Brooks | 26 | Lodger | Laborer | Lowell |
| 52 | Catherine Brooks | 23 | Lodger | — | Lowell |
| 53 | Fredrick Brooks | 3 | Lodger | — | Lowell |
| 54 | James Brooks | 2 | Lodger | — | Lowell |
| 55 | George Brooks | 1 | Lodger | — | Lowell |
| 56 | George Morrill | 25 | Head | Laborer | Lowell |
| 57 | Catherine Morrill | 22 | Wife | — | Boston |
| 58 | George Morrill | 4 | Son | — | Lowell |
| 59 | Catherine Sullivan | 50 | Head | — | Lowell |
| 60 | Julia B Sullivan | 49 | Sister | Mender | Lowell |
| 61 | Jennie Adams | 43 | Head | — | Lowell |
| 62 | Beatrice Adams | 24 | Daughter | Waitress | Lowell |
| 63 | Dolly Adams | 20 | Daughter | Cashier | Lowell |
| 64 | Thomas White | 26 | Head | Cardroom | Lowell |
| 65 | Mary White | 60 | Mother | — | Rhode Island |
| 66 | Mary White | 17 | Daughter | — | Massachusetts |
| 67 | William Willis | 29 | Head | Mechanic | Lowell |
| 68 | Anna Willis | 30 | Wife | — | Lowell |
| 69 | James Willis | 7 | Son | — | Lowell |
| 70 | William Willis | 5 | Son | — | Lowell |
| 71 | Joseph Willis | 2 | Son | — | Lowell |
| 72 | Joseph Barrett | 26 | Head | Clerk | Lowell |
| 73 | Joseph Barrett | 4 | Son | — | Lowell |
| 74 | Dorothy Barrett | 1 | Daughter | — | Lowell |
| 75 | Fredrick Shula | 28 | Head | Filler | Lowell |
| 76 | Phyllis Shula | 25 | Wife | — | Lowell |
| 77 | Phyllis Shula | 1 | Daughter | — | Lowell |
| 78 | Thomas Riley | 62 | Head | Doffer | Lowell |
| 79 | Mary Riley THIS PERSON | 61 | Wife | — | New Hampshire |
| 80 | Gerald Riley | 23 | Son | Pneumatic | Lowell |
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)