MG
Mary Griffin — 1940 US Census Record
Model Tree available1940 United States Federal Census · Johnson-County, Kansas
Our Model Tree links this Mary Griffin across the 1920, 1930 and 1940 US Censuses in Johnson-County, Kansas (XGBoost, ~Confirmed), with identified parents Harry & Harry — first a daughter (b.~1915), then head of a 7-person household.
Age 25
b. ~1915
Female
Daughter
Born: Kansas
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Johnson-County, Kansas |
| Surname | Griffin |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Johnson |
| Additional Details | |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Township / Ward | Gardner Township |
| Est. Birth Year | ~1915 |
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.
7 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Griffin | Daughter | — | 25 | ~1915 |
| Arlene Griffin | Daughter | — | 11 | ~1929 |
| Katherine Griffin | Daughter | — | 13 | ~1927 |
| Julia Griffin | Daughter | — | 16 | ~1924 |
| Harry Griffin | Head | — | 52 | ~1888 |
| Francis Griffin | Son | — | 24 | ~1916 |
| Allie Griffin | Spouse | — | 45 | ~1895 |
Census Appearances
1920
Johnson, Kansas
Daughter, age 5
Johnson, Kansas · implied b. ~1915 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Missouri |
| Occupation | none |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1930
Johnson, Kansas
Daughter, age 16
Johnson, Kansas · implied b. ~1914 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffin |
| Given Name | Mary L |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 16 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Kansas |
| Mother's Birthplace | Missouri |
| Can Read/Write | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1940
Johnson-County, Kansas
Daughter, age 25
Johnson-County, Kansas · implied b. ~1915 — 7 household members
| Surname | Griffin |
| Given Name | Mary L. |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 25 |
| Marital Status | Single |
| Birthplace | Kansas |
| 1935 Residence (City) | R |
| 1935 Residence (County) | Johnson |
| Class of Worker | 0 |
| Hours Worked | 0 |
| Income (1939) | 0 |
| Highest Grade | H 4 |
| 1935 Residence | Kansas |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
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 Griffin across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage. Identified parents: father Harry Griffin (~0.92 confidence) and father Harry Griffin (~0.92 confidence) and mother Allie Griffin (~0.92 confidence) and mother Alice Griffin (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Harry Griffin
b. ~1888
Source father
● Household
· direct · ~0.92
Father
Harry Griffin
b. ~1888
Source father
● Household
· direct · ~0.92
Mother
Allie Griffin
b. ~1894
Source mother
● Household
· direct · ~0.92
Mother
Alice Griffin
b. ~1894
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Griffin
Daughter · 1940 · age 25 · b. ~1915 · Kansas
★ You are viewing this record
Sibling
Arlene Griffin
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Griffin
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Francis Griffin
Sibling · 1940 · age 24
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Julia Griffin
Sibling · 1940 · age 16
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 — Johnson-County, Kansas
Open full size
1940 US Federal Census — Johnson-County, Kansas
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-01237-00057)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Ethel M. Murray | 48 | Wife | — | Missouri |
| 42 | Robert H. Briggs | 11 | Nephew | — | Kansas |
| 43 | Oliver B. Hollenbaugh | 57 | Head | Farmer | Kansas |
| 44 | Anna A. Hollenbaugh | 58 | Wife | — | Kansas |
| 45 | George O. Hollenbaugh | 29 | Son | Farmer | Kansas |
| 46 | Frank B. Sharp | 40 | Head | Groundman | Kansas |
| 47 | Imogene Sharp | 34 | Wife | — | Kansas |
| 48 | J. David Sharp | 15 | Son | — | Kansas |
| 49 | Willa Dee Sharp | 13 | Daughter | — | Kansas |
| 50 | J. Roy Gay | 33 | Head | Farmer | Kansas |
| 51 | Margaret Gay | 28 | Wife | — | Kansas |
| 52 | Richard H. Gay | 8 | Son | — | Kansas |
| 53 | Bernard L. Gay | 5 | Son | — | Kansas |
| 54 | Hugh Pugh | 39 | Head | Farmer | England |
| 55 | Margaret Pugh | 73 | Mother | — | England |
| 56 | Elmer D. Ford | 61 | Head | Farmer | Illinois |
| 57 | Nora Ford | 60 | Wife | — | Kansas |
| 58 | John E. Wagner | 43 | Head | Farmer | Kansas |
| 59 | Nellie Wagner | 24 | Wife | — | Kansas |
| 60 | Harry S. Griffin | 52 | Head | Farmer | Kansas |
| 61 | Allie Griffin | 45 | Wife | — | Missouri |
| 62 | Mary L. Griffin THIS PERSON | 25 | Daughter | — | Kansas |
| 63 | Francis J. Griffin | 24 | Son | Filling Station | Kansas |
| 64 | Julia A. Griffin | 16 | Daughter | — | Kansas |
| 65 | Katherine A. Griffin | 13 | Daughter | — | Kansas |
| 66 | Arlene E. Griffin | 11 | Daughter | — | Kansas |
| 67 | Elton E. Donovan | 48 | Head | Farmer | Kansas |
| 68 | Ethel M. Donovan | 46 | Wife | — | Kansas |
| 69 | Royal F. Wilson | 43 | Head | Farmer | Kansas |
| 70 | Bessie P. Wilson | 48 | Wife | — | Kansas |
| 71 | Myron L. Wilson | 20 | Son | Farmer | Kansas |
| 72 | Maxine L. Wilson | 17 | Daughter | — | Kansas |
| 73 | Frank Haralson | 51 | Head | Farmer | Missouri |
| 74 | Josephine Haralson | 55 | Wife | — | Missouri |
| 75 | James Mcavoy | 55 | Head | Farmer | Kansas |
| 76 | Ruby L. Mcavoy | 46 | Wife | — | Kansas |
| 77 | David Mcavoy | 82 | Head | — | Wisconsin |
| 78 | Lizzie Mcavoy | 78 | Wife | — | Kansas |
| 79 | E. Oliver Clark | 49 | Head | Farmer | Kansas |
| 80 | Rena Clark | 44 | Wife | — | Missouri |
Related Census Records
Pedigree Summary
Mary + 4 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)