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Mary Montgomery — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Juan-County, Washington
Our Model Tree links this Mary Montgomery across the 1920, 1930 and 1940 US Censuses in San-Juan-County, Washington (XGBoost, ~Confirmed) — first a spouse (b.~1888), then head of a 5-person household.
Age 52
b. ~1888
Female
Spouse
Born: New Mexico
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Juan-County, Washington |
| Surname | Montgomery |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | New Mexico |
| 1935 Residence (City) | Deer Harbor |
| 1935 Residence (County) | San Juan |
| Additional Details | |
| Hours Worked | 70 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | New Mexico |
| Birth Country | United States |
| Birthplace (normalized) | new mexico |
| Township / Ward | Deer Harbor |
| Est. Birth Year | ~1888 |
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 Mary | Age | Birth yr |
|---|---|---|---|---|
| Joseph Montgomery | Head | — | 51 | ~1889 |
| John Montgomery | Son | — | 22 | ~1918 |
| Pat Montgomery | Son | — | 16 | ~1924 |
| Richard Montgomery | Son | — | 29 | ~1911 |
| Mary Montgomery | Spouse | — | 52 | ~1888 |
Census Appearances
1920
San Juan, …
Spouse, age 31
San Juan, Washington · implied b. ~1889 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | Mary S. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 31 |
| Marital Status | Married |
| Birthplace | New Mexico |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | New Mexico |
| Birth Country | United States |
| Birthplace (normalized) | new mexico |
1930
San Juan, …
Spouse, age 42
San Juan, Washington · implied b. ~1888 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Montgomery |
| Given Name | Mary S. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 42 |
| Marital Status | Married |
| Birthplace | New Mexico |
| Age at First Marriage | 25 |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Pennsylvania |
| Occupation | none |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Veteran | No |
| Birth State | New Mexico |
| Birth Country | United States |
| Birthplace (normalized) | new mexico |
1940
San-Juan-County, Washington
Spouse, age 52
San-Juan-County, Washington · implied b. ~1888 — 5 household members
| Surname | Montgomery |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | New Mexico |
| 1935 Residence (City) | Deer Harbor |
| 1935 Residence (County) | San Juan |
| Hours Worked | 70 |
| Highest Grade | C 2 |
| 1935 Residence | Same place |
| Birth State | New Mexico |
| Birth Country | United States |
| Birthplace (normalized) | new mexico |
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 Montgomery across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Mary Montgomery
Spouse · 1940 · age 52 · b. ~1888 · Washington
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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 — San-Juan-County, Washington
Open full size
1940 US Federal Census — San-Juan-County, Washington
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-04356-01139)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Mary A. Lockwood | 63 | Wife | — | Wisconsin |
| 2 | Ed. D. Morrison | 48 | Head | Farmer | Canada English |
| 3 | William A. Morrison | 18 | Son | Laborer | Washington |
| 4 | Theodore A. Morrison | 11 | Son | — | Washington |
| 5 | H. B. Linton | 56 | Head | Farmer | New York |
| 6 | Henry T. Payon | 70 | Head | Contractor | Washington |
| 7 | Edith E. Payon | 60 | Wife | — | England |
| 8 | James S. Thompson | 30 | Head | Tractor Driver | Wash |
| 9 | Lucille D. Thompson | 25 | Wife | — | Wash |
| 10 | Betty Jean Thompson | 4 | Daughter | — | Wash |
| 11 | Clifford A. Thompson | 1 | Son | — | Wash |
| 12 | Joseph A. Montgomery | 51 | Head | Farmer | Kansas |
| 13 | Mary L. Montgomery THIS PERSON | 52 | Wife | — | New Mexico |
| 14 | John W. Montgomery | 22 | Son | Laborer | Wash |
| 15 | Richard L. Montgomery | 29 | Son | Farmer | Wash |
| 16 | Pat L. Montgomery | 16 | Son | — | Wash |
| 17 | Richard J. Shaw | 31 | Head | Diesel Engineer | Wash |
| 18 | Edith E. Shaw | 28 | Wife | — | Wash |
| 19 | Henry E. Shaw | 7 | Son | — | Wash |
| 20 | Theodore Pederson | 55 | Head | Pile Driver | Wash |
| 21 | Elizabeth D. Pederson | 60 | Wife | — | Wash |
| 22 | Ray L. Germain | 53 | Head | Retired | Kansas |
| 23 | George D. Germain | 50 | Head | Fisherman | Kansas |
| 24 | Everett Scott | 39 | Head | — | Wash |
| 25 | Felix J. Norton | 44 | Head | Proprietor | Canada Engl |
| 26 | Esther E. Norton | 37 | Wife | — | Canada Engl |
| 27 | Larry E. Norton | 4 | Son | — | Canada Engl |
| 28 | William W. Poor | 41 | Head | Farmer | Wash |
| 29 | Winnifred G. Poor | 45 | Wife | — | Oregon |
| 30 | Rena D. Johnson | 75 | Head | Owner | Sweden |
| 31 | Jane M. Buchanan | 52 | Head | — | Canada Eng |
| 32 | William H. Weddle | 48 | Head | Farmer | Wash |
| 33 | Jenny L. Weddle | 42 | Wife | Postmistress | Wash |
| 34 | Wayland L. Weddle | 19 | Son | — | Wash |
| 35 | Eloise H. Weddle | 17 | Daughter | — | Wash |
| 36 | Fred W. Mccreary | 62 | Head | Proprietor | Ohio |
| 37 | Harriette B. Mccreary | 69 | Wife | — | Michigan |
| 38 | Roland A. Mccreary | 29 | Son | — | Wash |
| 39 | Carl E. Lehman | 40 | Head | Marine Engineer | Wash |
| 40 | Helen L. Lehman | 36 | Wife | — | Wash |
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)