MF
Mary Foley — 1920 US Census Record
Linked across censuses1920 United States Federal Census · San Francisco, California
Our Model Tree links this Mary Foley across the 1920, 1930 and 1940 US Censuses in San Francisco, California (XGBoost, ~Confirmed) — first a head (b.~1869), then head of a 4-person household.
Age 51
b. ~1869
Female
Head
Born: California
Widowed
1920 Census Record Details
| Census Year | 1920 |
| Location | San Francisco, California |
| Surname | Foley |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Widowed |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | City Of San Francisco |
| Est. Birth Year | ~1869 |
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.
4 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| May Foley | Daughter | — | 14 | ~1906 |
| Ella Foley | Daughter | — | 15 | ~1905 |
| Mary Foley | Head | — | 51 | ~1869 |
| William Fallon | Other | — | 20 | ~1900 |
Census Appearances
1920
San Francisco, …
Head, age 51
San Francisco, California · implied b. ~1869 — 4 household members
| Surname | Foley |
| Given Name | Mary |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 51 |
| Marital Status | Widowed |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Other, age 61
San Francisco, California · implied b. ~1869 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foley |
| Given Name | Mary E. |
| Relationship to Head | Sister-H |
| Sex | F |
| Color / Race | White |
| Age | 61 |
| Marital Status | Widowed |
| Birthplace | California |
| Age at First Marriage | 34 |
| Father's Birthplace | Ireland Unknown |
| Mother's Birthplace | Ireland Unknown |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Head, age 70
San-Francisco-County, California · implied b. ~1870 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Foley |
| Given Name | Mamie |
| Relationship to Head | Head |
| Sex | F |
| Color / Race | White |
| Age | 70 |
| Marital Status | Widowed |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | Domestic |
| Industry | Private Home |
| Class of Worker | PW |
| Hours Worked | 40 |
| Income (1939) | 225 |
| Highest Grade | C-3 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Foley 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 Foley
Head · 1920 · age 51 · b. ~1869 · California
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — San Francisco, California
Open full size
1920 US Federal Census — San Francisco, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu141unit:1100)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Harry J Smallwood | 55 | Head | Clerical Work | Maryland |
| 2 | Lillian Smallwood | 38 | Wife | — | Ohio |
| 3 | Charles Smallwood | 7 | Son | — | California |
| 4 | Marie Smallwood | 4 | Daughter | — | California |
| 5 | John Eckhardt | 44 | Head | Machinist | New York |
| 6 | Anna Eckhardt | 44 | Wife | — | New York |
| 7 | Raymond Eckhardt | 19 | Son | Designer | New York |
| 8 | Roland Eckhardt | 10 | Son | — | New York |
| 9 | Edward Eckhardt | 7 | Son | — | New York |
| 10 | Martin Gallagher | 37 | Head | Police Officer | Ireland |
| 11 | Catherine Gallagher | 33 | Wife | — | Ireland |
| 12 | Francis Gallagher | 12 | Son | — | California |
| 13 | Catherine Gallagher | 10 | Daughter | — | California |
| 14 | Delia Farrell | 59 | Head | — | Ireland |
| 15 | Carl Timm | 68 | Head | Letter Carrier | Hamburg |
| 16 | Augusta Timm | 60 | Wife | — | Saxony |
| 17 | Cassilia Timm | 27 | Daughter | Copyist | California |
| 18 | Phillip Doerr | 69 | Head | Blacksmith | Darmstadt |
| 19 | Elizabeth Doerr | 55 | Wife | — | Darmstadt |
| 20 | Edward Doerr | 29 | Son | Clerical Work | California |
| 21 | George Doerr | 27 | Son | Fireman | California |
| 22 | Frank Griffin | 24 | Son-in-law | Painter | Australia |
| 23 | Lillian Griffin | 24 | Daughter | — | California |
| 24 | Baptiste Deveze | 44 | Head | Cook | France |
| 25 | Catherine Deveze | 39 | Wife | — | Texas |
| 26 | Andre Deveze | 15 | Son | — | California |
| 27 | Louise Deveze | 8 | Daughter | — | California |
| 28 | James Murdock | 29 | Head | Iron Worker | Ireland |
| 29 | Catherine Murdock | 27 | Wife | — | Ireland |
| 30 | John Murdock | 4 | Son | — | California |
| 31 | Leslie Murdock | 3 | Son | — | California |
| 32 | Rutherford Murdock | 1 | Son | — | California |
| 33 | Walter Murdock | 0 | Son | — | California |
| 34 | Sarah Davis | 68 | Head | — | Ohio |
| 35 | Ernest Davis | 37 | Son | Gas Fitter | Ohio |
| 36 | John Archibald | 76 | Head | Carpenter | Scotland |
| 37 | Frances Archibald | 73 | Wife | — | New York |
| 38 | William Hoschele | 46 | Lodger | Grocer | California |
| 39 | Mary Foley THIS PERSON | 51 | Head | — | California |
| 40 | Ella Foley | 15 | Daughter | Saleslady | California |
| 41 | May Foley | 14 | Daughter | — | California |
| 42 | William Fallon | 20 | Nephew | Plumber | California |
| 43 | James Fallon | 49 | Head | Iron Worker | California |
| 44 | Elsie Gibbs | 21 | Lodger | Cleaner | Ohio |
| 45 | Clyde Gibbs | 3 | Lodger | — | California |
| 46 | Mary Gibbs | 1 | Lodger | — | California |
| 47 | Sarah Byrnes | 70 | Head | — | Ireland |
| 48 | James Byrnes | 48 | Son | Office Clerk | Nebraska |
| 49 | Catherine Byrnes | 44 | Daughter | — | California |
| 50 | Margaret Byrnes | 69 | Sister | — | Ireland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)