GZ
George Zimmerman — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Boulder-County, Colorado
Our Model Tree links this George Zimmerman across the 1920, 1930 and 1940 US Censuses in Boulder-County, Colorado (XGBoost, ~Confirmed) — first a head (b.~1893), then head of a 3-person household.
Age 47
b. ~1893
Male
Head
Born: Colorado
Married
1940 Census Record Details
| Census Year | 1940 |
| Location | Boulder-County, Colorado |
| Surname | Zimmerman |
| Given Name | George |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Boulder |
| 1935 Residence (County) | Boulder |
| Additional Details | |
| Occupation | trucking |
| Industry | hauling coal |
| Class of Worker | OA |
| Hours Worked | 25 |
| Income (1939) | 450 |
| Highest Grade | H 3 |
| 1935 Residence | Same house |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Trucking |
| Township / Ward | Boulder |
| Est. Birth Year | ~1893 |
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 George | Age | Birth yr |
|---|---|---|---|---|
| Glen Zimmerman | Son | — | 12 | ~1928 |
| Margaret Zimmerman | Spouse | — | 47 | ~1893 |
| George Zimmerman | Head | — | 47 | ~1893 |
Census Appearances
1920
Boulder, Colorado
Other, age 27
Boulder, Colorado · implied b. ~1893 — 50 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | George |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Colorado |
| Father's Birthplace | Germany |
| Mother's Birthplace | Pennsylvania |
| Occupation | auto mechanic |
| Industry | garage |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Boulder, Colorado
Head, age 37
Boulder, Colorado · implied b. ~1893 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Zimmerman |
| Given Name | George A. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 37 |
| Marital Status | Married |
| Birthplace | Colorado |
| Age at First Marriage | 30 |
| Father's Birthplace | Germany |
| Mother's Birthplace | Germany |
| Occupation | Mechanic |
| Industry | Garage |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 5000 |
| Radio Set | R |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1940
Boulder-County, Colorado
Head, age 47
Boulder-County, Colorado · implied b. ~1893 — 3 household members
| Surname | Zimmerman |
| Given Name | George |
| Relationship to Head | head |
| Sex | M |
| Color / Race | White |
| Age | 47 |
| Marital Status | Married |
| Birthplace | Colorado |
| 1935 Residence (City) | Boulder |
| 1935 Residence (County) | Boulder |
| Occupation | trucking |
| Industry | hauling coal |
| Class of Worker | OA |
| Hours Worked | 25 |
| Income (1939) | 450 |
| Highest Grade | H 3 |
| 1935 Residence | Same house |
| 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 George Zimmerman across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
George Zimmerman
Head · 1940 · age 47 · b. ~1893 · Colorado
★ 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 — 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-t0627-00457-00671)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Mary E Ross | 27 | daughter | Case Worker | New York |
| 42 | Victor E Fabrizio | 35 | head | Butcher | Colorado |
| 43 | Florence Fabrizio | 35 | wife | — | Colorado |
| 44 | Joan Fabrizio | 9 | daughter | — | Colorado |
| 45 | Warren Fabrizio | 5 | son | — | Colorado |
| 46 | George Zimmerman THIS PERSON | 47 | head | Trucking | Colorado |
| 47 | Margaret Zimmerman | 47 | wife | — | Colorado |
| 48 | Glen P Zimmerman | 12 | son | — | Colorado |
| 49 | Margaret H Mullen | 52 | head | — | Iowa |
| 50 | Rosa C Mullen | 44 | sister | — | Iowa |
| 51 | Willard Butt | 29 | head | Truck Operator | Colorado |
| 52 | Merle Butt | 30 | wife | — | Kansas |
| 53 | Marjorie Butt | 1 | daughter | — | Colorado |
| 54 | George Thomas | 44 | head | Hoisting Engnr | Illinois |
| 55 | Vera Thomas | 35 | wife | — | Nebraska |
| 56 | Lona Barbara Thomas | 6 | daughter | — | Nebraska |
| 57 | Lillian H Capps | 54 | head | — | Ohio |
| 58 | Jack H Cyp | 33 | head | Contractor | Holland |
| 59 | Mable Cyp | 37 | wife | — | Iowa |
| 60 | Harold Brooks | 35 | head | Electrical Engnr | Colorado |
| 61 | Hazel Brooks | 24 | wife | — | Colorado |
| 62 | Hortense Boyd | 70 | head | — | Illinois |
| 63 | Richard Boyd | 35 | son | Night Operator | Colorado |
| 64 | Lydia Greene | 74 | head | — | Missouri |
| 65 | Lawrence Corcoran | 22 | head | Miner | Kansas |
| 66 | Hazel Corcoran | 19 | wife | — | Kansas |
| 67 | Rita M Corcoran | 0 | daughter | — | Colorado |
| 68 | Mary L Affolter | 55 | head | — | Illinois |
| 69 | Eva Burkich | 62 | lodger | — | Illinois |
| 70 | Edith Guerrilla | 49 | head | Housework | Kansas |
| 71 | Paul Guerrilla | 20 | son | Field Work | Kansas |
| 72 | Francis Guerrilla | 15 | daughter | — | Kansas |
| 73 | Imogene Guerrilla | 14 | daughter | — | Kansas |
| 74 | Jo Ann Guerrilla | 12 | daughter | — | Kansas |
| 75 | Elsie Wangelin | 57 | head | — | New York |
| 76 | James Whitmore | 90 | aunt | — | New York |
| 77 | Joseph M Smith | 35 | head | Operator Of Mine & Mill | Colorado |
| 78 | Ilene Smith | 31 | wife | — | Nebraska |
| 79 | Dan Smith | 5 | son | — | Colorado |
| 80 | Michael Smith | 2 | 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)