JL
Joseph Lynch — 1940 US Census Record
Linked across censuses1940 United States Federal Census · San-Francisco-County, California
Our Model Tree links this Joseph Lynch across the 1920, 1930 and 1940 US Censuses in San-Francisco-County, California (XGBoost, ~Confirmed) — first a head (b.~1878), then head of a 4-person household.
Age 62
b. ~1878
Male
Head
Born: California
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | San-Francisco-County, California |
| Surname | Lynch |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Additional Details | |
| Occupation | Laborer |
| Industry | Customs House |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1500 |
| Highest Grade | No 4 |
| 1935 Residence | Same place |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Occupation | Laborer |
| Township / Ward | San Francisco |
| Est. Birth Year | ~1878 |
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 1940 census.
| Name | Relation to head | Relative to Joseph | Age | Birth yr |
|---|---|---|---|---|
| Joseph Lynch | Head | — | 62 | ~1878 |
| Walter Lynch | Son | — | 21 | ~1919 |
| David Lynch | Son | — | 25 | ~1915 |
| Georgina Lynch | Spouse | — | 49 | ~1891 |
Census Appearances
1920
San Francisco, …
Head, age 40
San Francisco, California · implied b. ~1880 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Joseph H. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 40 |
| Marital Status | Married |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Dentist |
| Industry | Office |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
San Francisco, …
Head, age 52
San Francisco, California · implied b. ~1878 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Lynch |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 52 |
| Marital Status | Married |
| Birthplace | California |
| Age at First Marriage | 24 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | Laborer |
| Industry | Custom House |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25.00 |
| Radio Set | R |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
San-Francisco-County, California
Head, age 62
San-Francisco-County, California · implied b. ~1878 — 4 household members
| Surname | Lynch |
| Given Name | Joseph |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 62 |
| Marital Status | Married |
| Birthplace | California |
| 1935 Residence (City) | San Francisco |
| 1935 Residence (County) | San Francisco |
| Occupation | Laborer |
| Industry | Customs House |
| Class of Worker | GW |
| Hours Worked | 48 |
| Income (1939) | 1500 |
| Highest Grade | No 4 |
| 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 Joseph Lynch across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Joseph Lynch
Head · 1940 · age 62 · b. ~1878 · California
★ You are viewing this record
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
40 people indexed on this census page (nara:1940:m-t0627-00316-00252)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | William Duggan | 2 | Son | — | California |
| 42 | Arthur Hinkle | 48 | Head | Painter | Free State |
| 43 | Ruth Hinkle | 27 | Wife | — | Germany |
| 44 | Gloria Hinkle | 8 | Daughter | — | California |
| 45 | William Cosgrove | 64 | Head | — | California |
| 46 | Paul E. Cosgrove | 36 | Son | Ship Clerk | California |
| 47 | Harold Cosgrove | 30 | Son | Ship Clerk | California |
| 48 | Margaret Cosgrove | 27 | Daughter | Bill Clerk | California |
| 49 | Henry Castell | 23 | Head | Letter Carrier | California |
| 50 | Dena Castell | 20 | Wife | — | California |
| 51 | Edward Castello | 33 | Head | Truckman | California |
| 52 | Mary Castello | 23 | Wife | — | California |
| 53 | Edward Castello | 2 | Son | — | California |
| 54 | Ritchie Lana | 47 | Head | Grocery Store | Italy |
| 55 | Irene Lana | 42 | Wife | — | Italy |
| 56 | Ritchie Jr. Lana | 17 | Son | — | California |
| 57 | James Graham | 27 | Head | Post Office Clerk | Texas |
| 58 | Irene Graham | 30 | Wife | — | California |
| 59 | James Chinis | 62 | Head | Motorman | Iowa |
| 60 | Lena Chinis | 53 | Wife | — | California |
| 61 | Percy Sheffield | 52 | Head | Bartender | Belgium |
| 62 | Beryl Sheffield | 40 | Wife | Waitress | Washington |
| 63 | Leroy Sheffield | 9 | Son | — | Montana |
| 64 | Christopher Keegan | 46 | Head | Janitor | Irish Free State |
| 65 | Julia Keegan | 46 | Wife | — | Irish Free State |
| 66 | Wm Haggeman | 26 | Lodger | Warehouseman | California |
| 67 | John Brown | 30 | Lodger | Laborer | Free State |
| 68 | Ralph Evans | 30 | Head | Warehouseman | Montana |
| 69 | Margherita Evans | 27 | Wife | — | California |
| 70 | Jean Evans | 9 | Daughter | — | California |
| 71 | Anna May Evans | 6 | Daughter | — | California |
| 72 | Ralph Evans | 5 | Son | — | California |
| 73 | William Evans | 1 | Son | — | California |
| 74 | Emily Evans | 0 | Daughter | — | California |
| 75 | Michael Connors | 23 | Brother in law | Painter | California |
| 76 | Joseph Lynch THIS PERSON | 62 | Head | Laborer | California |
| 77 | Georgina Lynch | 49 | Wife | — | California |
| 78 | David M. Lynch | 25 | Son | New Worker | California |
| 79 | Walter Lynch | 21 | Son | Laborer | California |
| 80 | John Owens | 33 | Head | Truck Driver | Illinois |
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)