JF
John Flynn — 1940 US Census Record
Model Tree available1940 United States Federal Census · Sacramento-County, California
Our Model Tree links this John Flynn across the 1920, 1930 and 1940 US Censuses in Sacramento-County, California (XGBoost, ~Confirmed), with identified parents Thomas & Thomas — first a son (b.~1920), then head of a 5-person household.
Age 20
b. ~1920
Male
Son
Born: California
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Sacramento-County, California |
| Surname | Flynn |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Brighton Township |
| 1935 Residence (County) | Sacramento |
| Additional Details | |
| Class of Worker | 240 |
| Hours Worked | 0 |
| Highest Grade | C 1 |
| 1935 Residence | Same House |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Brighton Township |
| Est. Birth Year | ~1920 |
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 John | Age | Birth yr |
|---|---|---|---|---|
| Mary Flynn | Daughter | — | 18 | ~1922 |
| Lillian Flynn | Daughter | — | 10 | ~1930 |
| Thomas Flynn | Head | — | 51 | ~1889 |
| John Flynn | Son | — | 20 | ~1920 |
| Lillian Flynn | Spouse | — | 46 | ~1894 |
Census Appearances
1920
Sacramento, California
Son, age
Sacramento, California · implied b. ~1920 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | New York |
| Mother's Birthplace | California |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1930
Sacramento, California
Son, age 10
Sacramento, California · implied b. ~1920 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Flynn |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | New York |
| Mother's Birthplace | California |
| Can Read/Write | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1940
Sacramento-County, California
Son, age 20
Sacramento-County, California · implied b. ~1920 — 5 household members
| Surname | Flynn |
| Given Name | John F. |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | California |
| 1935 Residence (City) | Brighton Township |
| 1935 Residence (County) | Sacramento |
| Class of Worker | 240 |
| Hours Worked | 0 |
| Highest Grade | C 1 |
| 1935 Residence | Same House |
| 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 John Flynn across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Thomas Flynn (~0.92 confidence) and father Thomas Flynn (~0.92 confidence) and mother Lillian Flynn (~0.92 confidence) and mother Lillian Flynn (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Thomas Flynn
b. ~1889
Source father
● Household
· direct · ~0.92
Father
Thomas Flynn
b. ~1889
Source father
● Household
· direct · ~0.92
Mother
Lillian Flynn
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Lillian Flynn
b. ~1895
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Flynn
Son · 1940 · age 20 · b. ~1920 · California
★ You are viewing this record
Sibling
Mary Flynn
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lillian Flynn
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1940 US Federal Census — Sacramento-County, California
Open full size
1940 US Federal Census — Sacramento-County, California
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00280-00565)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Eugenia Jenkins | 29 | Wife | — | California |
| 42 | Charles D. Jr. Jenkins | 10 | Son | — | California |
| 43 | Kendall Jenkins | 7 | Son | — | California |
| 44 | Adessa Blackwood | 69 | Head | — | Iowa |
| 45 | Hazel Blackwood | 51 | Daughter | Welder | Nebraska |
| 46 | Richard Fawcett | 41 | Head | Platformman | California |
| 47 | Roma K. Fawcett | 36 | Wife | — | California |
| 48 | Verda Belle Fawcett | 17 | Daughter | — | California |
| 49 | Vera Dorothy Fawcett | 15 | Daughter | — | California |
| 50 | John Hubert Fawcett | 9 | Son | — | California |
| 51 | William Verna Fawcett | 8 | Son | — | California |
| 52 | Edgar Frankie Fults | 42 | Head | Auto Mechanic | Missouri |
| 53 | Mabel Edith Fults | 34 | Wife | — | New Mexico |
| 54 | Frankie Lee Fults | 14 | Daughter | — | New Mexico |
| 55 | Kenneth Eugene Fults | 12 | Son | — | New Mexico |
| 56 | Jackie E. Fults | 11 | Son | — | California |
| 57 | Arthur Pauls | 30 | Head | Service Station | California |
| 58 | Lucile Pauls | 45 | Wife | — | California |
| 59 | Ted Bright | 20 | Step-son | Relief Clerk | California |
| 60 | Wm. W. Franklin | 59 | Head | Mechanic | California |
| 61 | Bertha Franklin | 57 | Wife | Waitress | Oregon |
| 62 | Charles J. Mersereau | 67 | Head | Cabinet Maker | New Jersey |
| 63 | Anna Mersereau | 67 | Wife | — | Holland |
| 64 | Thomas F. Flynn | 51 | Head | Foreman | New York |
| 65 | Lillian Flynn | 46 | Wife | — | California |
| 66 | John F. Flynn THIS PERSON | 20 | Son | — | California |
| 67 | Mary J. Flynn | 18 | Daughter | — | California |
| 68 | Lillian N. Flynn | 10 | Daughter | — | California |
| 69 | Herbert L. Smith | 31 | Head | Foreman | California |
| 70 | Jean Smith | 24 | Wife | — | Utah |
| 71 | Lavana Smith | 11 | Daughter | — | California |
| 72 | Norma J. Smith | 6 | Daughter | — | California |
| 73 | Donna Smith | 3 | Daughter | — | California |
| 74 | Leslie Biddle | 42 | Head | Auto Mechanic | Wisconsin |
| 75 | Dorothy Biddle | 32 | Wife | — | Minnesota |
| 76 | Leslie Jr. Biddle | 12 | Son | — | Washington |
| 77 | Lorraine Biddle | 10 | Daughter | — | Washington |
| 78 | Fred Biancalani | 46 | Head | Meat Cutter | California |
| 79 | Elise Biancalani | 43 | Wife | — | Utah |
| 80 | Robert Biancalani | 10 | Son | — | California |
Pedigree Summary
John + 2 siblings
Gen 1 · 4 parents
~0.92
Max depth 4 (1900–1950 window)
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)