MK
Mary Kirk — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Middlesex-County, Massachusetts
Our Model Tree links this Mary Kirk across the 1930 and 1940 US Censuses in Middlesex-County, Massachusetts (XGBoost, ~Confirmed) — first a spouse (b.~1892), then head of a 8-person household.
Age 48
b. ~1892
Female
Spouse
Born: Massachusetts
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Middlesex-County, Massachusetts |
| Surname | Kirk |
| Given Name | Mary V |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | H-2 |
| 1935 Residence | Same place |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
| Township / Ward | Medford City |
| Est. Birth Year | ~1892 |
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.
8 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Kirk | Daughter | — | 20 | ~1920 |
| Elizabeth Kirk | Daughter | — | 16 | ~1924 |
| Mary Kirk | Spouse | — | 48 | ~1892 |
| Claire Kirk | Daughter | — | 14 | ~1926 |
| Barbara Kirk | Daughter | — | 13 | ~1927 |
| Joan Kirk | Daughter | — | 9 | ~1931 |
| Margaret Kirk | Daughter | — | 18 | ~1922 |
| Thomas Kirk | Head | — | 51 | ~1889 |
Census Appearances
1930
Middlesex, Massachusetts
Spouse, age 38
Middlesex, Massachusetts · implied b. ~1892 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Kirk |
| Given Name | Mary B. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| Age at First Marriage | 25 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Birth State | Massachusetts |
| Birth Country | United States |
| Birthplace (normalized) | massachusetts |
1940
Middlesex-County, Massachusetts
Spouse, age 48
Middlesex-County, Massachusetts · implied b. ~1892 — 8 household members
| Surname | Kirk |
| Given Name | Mary V |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Massachusetts |
| 1935 Residence (City) | Medford City |
| 1935 Residence (County) | Middlesex |
| Income (1939) | 0 |
| Highest Grade | H-2 |
| 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 Mary Kirk across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Kirk
Spouse · 1940 · age 48 · b. ~1892 · 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
38 people indexed on this census page (nara:1940:m-t0627-01611-00248)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Russell Murphy | 15 | Son | — | Massachusetts |
| 2 | Patricia Murphy | 8 | Daughter | — | Massachusetts |
| 4 | Cornelius Crowley | 51 | Head | Lineman | Eire |
| 5 | Marion E Crowley | 24 | Daughter | Bookkeeper | Massachusetts |
| 6 | Herbert H Nay | 70 | Head | Piano Tuner | Massachusetts |
| 7 | Gertrude R Nay | 70 | Wife | — | Maine |
| 8 | Frank R Danner | 48 | Head | Engraver | Maine |
| 9 | Rosa R Danner | 48 | Wife | — | Texas |
| 10 | Dorothy C Danner | 20 | Daughter | Salesgirl | Massachusetts |
| 11 | Stanley R Danner | 15 | Son | — | Massachusetts |
| 12 | Thomas J Kirk | 51 | Head | Clerk | Eire |
| 13 | Mary V Kirk THIS PERSON | 48 | Wife | — | Massachusetts |
| 14 | Mary E Kirk | 20 | Daughter | New Worker | Massachusetts |
| 15 | Margaret M Kirk | 18 | Daughter | New Worker | Massachusetts |
| 16 | Elizabeth A Kirk | 16 | Daughter | — | Massachusetts |
| 17 | Claire F Kirk | 14 | Daughter | — | Massachusetts |
| 18 | Barbara M Kirk | 13 | Daughter | — | Massachusetts |
| 19 | Joan Kirk | 9 | Daughter | — | Massachusetts |
| 20 | Mary E Mitchell | 60 | Head | Clerk | Massachusetts |
| 21 | Harold F Ryder | 57 | Head | Chemist | Massachusetts |
| 22 | Lois C Ryder | 55 | Wife | — | Vermont |
| 23 | Robert W Sullivan | 43 | Head | Plumber | Canada-English |
| 24 | Clara H Sullivan | 39 | Wife | — | Canada-English |
| 25 | Mary J Sullivan | 13 | Daughter | — | Massachusetts |
| 26 | Robert J Sullivan | 12 | Son | — | Massachusetts |
| 27 | Edward F Sullivan | 10 | Son | — | Massachusetts |
| 28 | Arthur E Sullivan | 8 | Son | — | Massachusetts |
| 29 | Virginia C Sullivan | 6 | Daughter | — | Massachusetts |
| 30 | Margaret J Sullivan | 5 | Daughter | — | Massachusetts |
| 31 | Donald J Sullivan | 2 | Son | — | Massachusetts |
| 32 | John J Keely | 58 | Head | Machinist | Eire |
| 33 | Mary Keely | 51 | Wife | — | Eire |
| 34 | Thomas F Keely | 26 | Son | Salesman | Massachusetts |
| 35 | Francis P Keely | 24 | Son | Dental Mechanic | Massachusetts |
| 36 | Mary E Keely | 21 | Daughter | Stenographer | Massachusetts |
| 37 | Robert E Keely | 15 | Son | — | Massachusetts |
| 38 | Kathleen A Keely | 15 | Daughter | — | Massachusetts |
| 39 | Teresa R Keely | 13 | Daughter | — | Massachusetts |
Related Census Records
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)