MS
Mary Shannon — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Mary Shannon across the 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed) — first a spouse (b.~1887), then head of a 6-person household.
Age 53
b. ~1887
Female
Spouse
Born: Irish Free State
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Shannon |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | San Francisco |
| Naturalization Status | Naturalized |
| Additional Details | |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| Birthplace (normalized) | irish free state |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1887 |
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.
6 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Shannon | Spouse | — | 53 | ~1887 |
| Patrick Shannon | Head | — | 53 | ~1887 |
| Francis Shannon | Son | — | 17 | ~1923 |
| John Shannon | Son | — | 23 | ~1917 |
| Anthony Shannon | Son | — | 21 | ~1919 |
| Margaret Shannon | Daughter | — | 16 | ~1924 |
Census Appearances
1930
San Francisco, …
Spouse, age 43
San Francisco, California · implied b. ~1887 — 7 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shannon |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| Naturalization Status | Naturalized |
| Year of Immigration | 1903 |
| Age at First Marriage | 26 |
| Father's Birthplace | Irish Free State |
| Mother's Birthplace | Irish Free State |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Birthplace (normalized) | irish free state |
1940
San-Francisco-County, California
Spouse, age 53
San-Francisco-County, California · implied b. ~1887 — 6 household members
| Surname | Shannon |
| Given Name | Mary |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 53 |
| Marital Status | Married |
| Birthplace | Irish Free State |
| 1935 Residence (City) | San Francisco |
| Naturalization Status | Naturalized |
| Hours Worked | 0 |
| Highest Grade | No 8 |
| Birthplace (normalized) | irish free state |
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 Shannon across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Shannon
Spouse · 1940 · age 53 · b. ~1887 · California
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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-Francisco-County, California
Open full size
1940 US Federal Census — San-Francisco-County, California
Page Contents
38 people indexed on this census page (nara:1940:m-t0627-00321-00046)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert Niccolls | 5 | Son | — | California |
| 2 | Paul Paul | 44 | Uncle | Displayman | Iowa |
| 3 | Juliana Paul | 42 | Aunt | — | California |
| 4 | Thomas Levi | 53 | Head | Special Officer | Wisconsin |
| 5 | Mary Langley | 36 | Stepdaughter | Nurse | Washington |
| 6 | Veronia Rebell | 15 | Daughter | — | Montana |
| 7 | Patrick Shannon | 53 | Head | Builder | Irish Free State |
| 8 | Mary Shannon THIS PERSON | 53 | Wife | — | Irish Free State |
| 9 | John Shannon | 23 | Son | New Worker | California |
| 10 | Anthony Shannon | 21 | Son | — | California |
| 11 | Francis Shannon | 17 | Son | — | California |
| 12 | Margaret Shannon | 16 | Daughter | — | California |
| 14 | Harold Reich | 38 | Head | Merchant | Texas |
| 15 | Elnore Reich | 36 | Wife | Clerk | California |
| 16 | Shirley Reich | 13 | Daughter | — | California |
| 17 | Estelle Reich | 10 | Daughter | — | California |
| 18 | Howard Reich | 6 | Son | — | California |
| 19 | Bernice Silva | 24 | Maid | Maid | California |
| 20 | Ide Chambers | 61 | Head | — | California |
| 21 | George R Chambers | 29 | Son | Office Clerk | California |
| 22 | John H Chambers | 26 | Son | Clerk Credit | California |
| 23 | Florence Chambers | 23 | Daughter | Photographer | California |
| 24 | Camile Tournier | 57 | Head | Cook | France |
| 25 | Helen Tournier | 54 | Wife | — | France |
| 26 | George Tournier | 24 | Son | Cook | California |
| 27 | George A Fanning | 51 | Head | Photographer | No Dakota |
| 28 | Margaret M Fanning | 46 | Wife | — | California |
| 29 | Helen C Fanning | 24 | Daughter | New Worker | California |
| 30 | Jean R Fanning | 22 | Daughter | — | California |
| 31 | John Mccaffery | 56 | Head | Bridge Inspector | Pennsylvania |
| 32 | Ethel Mccaffery | 58 | Wife | — | Michigan |
| 33 | O'Neal Phelps | 29 | Stepson | Salesman | California |
| 34 | O'Neill Symatha Phelps | 30 | Daughter in law | — | Michigan |
| 35 | William Danziger | 48 | Head | Salesman | Illinois |
| 36 | Gisella Danziger | 38 | Wife | — | Hungary |
| 37 | Max Danziger | 19 | Son | — | California |
| 38 | Harold Scheier | 58 | Head | — | California |
| 39 | Clara A Scheier | 54 | Wife | — | Minnesota |
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)