WG
William Griffith — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boulder-County, Colorado
Our Model Tree links this William Griffith across the 1920, 1930 and 1940 US Censuses in Boulder-County, Colorado (XGBoost, ~Confirmed) — first a head (b.~1879), then head of a 3-person household.
Age 61
b. ~1879
Male
Head
Born: Colorado
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Boulder-County, Colorado |
| Surname | Griffith |
| Given Name | William E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Nederland Town |
| 1935 Residence (County) | Boulder |
| Additional Details | |
| Occupation | Plumber |
| Industry | Own Business |
| Class of Worker | OA |
| Hours Worked | 2 |
| Income (1939) | 348 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Plumber |
| Township / Ward | Nederland Town |
| Est. Birth Year | ~1879 |
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.
3 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to William | Age | Birth yr |
|---|---|---|---|---|
| William Griffith | Head | — | 61 | ~1879 |
| James Griffith | Son | — | 17 | ~1923 |
| Marie Griffith | Spouse | — | 51 | ~1889 |
Census Appearances
1920
Boulder, Colorado
Head, age 41
Boulder, Colorado · implied b. ~1879 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffith |
| Given Name | William E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 41 |
| Marital Status | Married |
| Birthplace | Colorado |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Stationary Engr |
| Industry | Quartz Mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | O |
| Home Free/Mortgaged | F |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Boulder, Colorado
Other, age 51
Boulder, Colorado · implied b. ~1879 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Griffith |
| Given Name | William E. |
| Relationship to Head | H |
| Sex | M |
| Color / Race | White |
| Age | 51 |
| Marital Status | Married |
| Birthplace | Colorado |
| Age at First Marriage | 21 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | Engineer |
| Industry | Stationary |
| Class of Worker | W |
| Can Read/Write | Yes |
| Mother Tongue | English |
| Home Owned/Rented | O |
| Home Value / Rent | 100 |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Boulder-County, Colorado
Head, age 61
Boulder-County, Colorado · implied b. ~1879 — 3 household members
| Surname | Griffith |
| Given Name | William E. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 61 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Nederland Town |
| 1935 Residence (County) | Boulder |
| Occupation | Plumber |
| Industry | Own Business |
| Class of Worker | OA |
| Hours Worked | 2 |
| Income (1939) | 348 |
| Highest Grade | 8 |
| 1935 Residence | Same Place |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
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 William Griffith across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
William Griffith
Head · 1940 · age 61 · b. ~1879 · Colorado
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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 — Boulder-County, Colorado
Open full size
1940 US Federal Census — Boulder-County, Colorado
Page Contents
40 people indexed on this census page (nara:1940:m-t0627-00457-00210)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Charles R. Miller | 42 | Head | Retail Store Oper | Colorado |
| 2 | Vana B. Miller | 47 | Wife | Retail Store Oper | Colorado |
| 3 | Charles W. Forbes | 63 | Head | Lather | Illinois |
| 4 | Mary Forbes | 53 | Wife | — | Iowa |
| 5 | Paul James Drake | 40 | Head | Miner | Iowa |
| 6 | Inez R. Drake | 37 | Wife | — | Colorado |
| 7 | Paul C. Drake | 13 | Son | — | Colorado |
| 8 | Robert M. Drake | 12 | Son | — | Colorado |
| 9 | Donald M. Drake | 8 | Son | — | Colorado |
| 10 | James W. Drake | 5 | Son | — | Colorado |
| 11 | William E. Griffith THIS PERSON | 61 | Head | Plumber | Colorado |
| 12 | Marie Griffith | 51 | Wife | — | Germany |
| 13 | James H. Griffith | 17 | Son | Laborer | Colorado |
| 14 | Ross L. Worth | 48 | Head | Laborer | Kansas |
| 15 | Mary F. Worth | 39 | Wife | — | Kentucky |
| 16 | George C. Cleveland | 32 | Head | Mill Man | Illinois |
| 17 | Ruth A. Cleveland | 26 | Wife | — | Colorado |
| 18 | Viola R. Cleveland | 10 | Daughter | — | Colorado |
| 19 | Charles R. Wilson | 50 | Head | — | Kansas |
| 20 | Ema Wilson | 53 | Wife | — | Missouri |
| 21 | Geo. L. Sutherland | 40 | Head | Filling Sta. Attendant | Kansas |
| 22 | Velma R. Sutherland | 34 | Wife | — | Nebraska |
| 23 | Robert L. Sutherland | 12 | Son | — | Colorado |
| 24 | Jackie R. Sutherland | 2 | Son | — | Colorado |
| 25 | Karl J. Schneider | 32 | Head | Filling Sta. Attendant | Missouri |
| 26 | Marjorie B. Schneider | 24 | Wife | Cook | Indiana |
| 27 | Elizabeth S. Grimmison | 67 | Head | — | Iowa |
| 28 | Richard A. Moorman | 39 | Head | Band Director | Kansas |
| 29 | Ruth R. Moorman | 38 | Wife | Music Teacher | Kansas |
| 30 | Edgar A. Moorman | 7 | Son | — | Missouri |
| 31 | Dorothy A. Moorman | 7 | Daughter | — | Missouri |
| 32 | Jacob F. Schlegel | 27 | Head | Teacher | Colorado |
| 33 | Aida J. Schlegel | 37 | Wife | Extension Office | Colorado |
| 34 | Rose E. G. Kortner | 62 | Head | — | Colorado |
| 35 | Warren E. Smith | 41 | Head | Principal | Colorado |
| 36 | Margaret B. Johnson | 25 | Head | Teacher | Colorado |
| 37 | Clarence B. Crimmison | 41 | Head | Custodian | Colorado |
| 38 | Margaret E. Crimmison | 37 | Wife | — | Colorado |
| 39 | William B. Crimmison | 17 | Son | — | Wyoming |
| 40 | Harry J. Crimmison | 15 | Son | — | Colorado |
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)