ER
Earl Robinson — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Boulder, Colorado
Our Model Tree links this Earl Robinson across the 1920, 1930 and 1940 US Censuses in Boulder, Colorado (XGBoost, ~Confirmed) — first a head (b.~1892), then head of a 4-person household.
Age 38
b. ~1892
Male
Head
Born: Illinois
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Boulder, Colorado |
| Surname | Robinson |
| Given Name | Earl |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 23 |
| Father's Birthplace | England |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Contractor |
| Industry | Coal Mines |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6500 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Contractor |
| Township / Ward | Longmont City |
| Est. Birth Year | ~1892 |
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 1930 census.
| Name | Relation to head | Relative to Earl | Age | Birth yr |
|---|---|---|---|---|
| Carl Ritter | Other | — | 17 | ~1913 |
| Mary Robinson | Spouse | — | 28 | ~1902 |
| Benjamin Robinson | Son | — | 7 | ~1923 |
| Earl Robinson | Head | — | 38 | ~1892 |
Census Appearances
1920
Boulder, Colorado
Other, age 27
Boulder, Colorado · implied b. ~1893 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robinson |
| Given Name | Earl |
| Relationship to Head | Brother |
| Sex | M |
| Color / Race | White |
| Age | 27 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | England |
| Mother's Birthplace | Illinois |
| Occupation | Launderman |
| Industry | Laundry |
| Class of Worker | Emp |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1930
Boulder, Colorado
Head, age 38
Boulder, Colorado · implied b. ~1892 — 4 household members
| Surname | Robinson |
| Given Name | Earl |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 38 |
| Marital Status | Married |
| Birthplace | Illinois |
| Age at First Marriage | 23 |
| Father's Birthplace | England |
| Mother's Birthplace | Illinois |
| Occupation | Contractor |
| Industry | Coal Mines |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | O |
| Home Value / Rent | 6500 |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1940
Boulder-County, Colorado
Head, age 48
Boulder-County, Colorado · implied b. ~1892 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Robenson |
| Given Name | Earl |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 48 |
| Marital Status | Married |
| Birthplace | Illinois |
| 1935 Residence (City) | Longmont City |
| 1935 Residence (County) | Boulder |
| Occupation | Auto Mechanic |
| Industry | Garage |
| Class of Worker | OA |
| Hours Worked | 24 |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same house |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Earl Robinson across 3 US Census years (1920, 1930 and 1940) in 2 locations, using XGBoost record linkage.
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This person
Anchor record
Earl Robinson
Head · 1930 · age 38 · b. ~1892 · Colorado
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1930 US Federal Census — Boulder, Colorado
Open full size
1930 US Federal Census — Boulder, Colorado
Page Contents
50 people indexed on this census page (ia:1930:15thcensus231unit:0296)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Robert L. Brown | 42 | Head | Proprietor | Tennessee |
| 2 | Mayde G. Brown | 45 | Wife | — | Iowa |
| 3 | Robert L. Jr. Brown | 14 | Son | — | Colorado |
| 4 | Melva C. Brown | 8 | Daughter | — | Colorado |
| 5 | James L. Carroll | 33 | Head | Proprietor | Nebraska |
| 6 | Lottie M. Carroll | 33 | Wife | — | Nebraska |
| 7 | Peggy L. Carroll | 3 | Daughter | — | Colorado |
| 8 | George Bragg | 78 | Head | — | Germany |
| 9 | George W. Bragg | 11 | Son | — | Colorado |
| 10 | Abraham L. Gibson | 68 | Head | Hired Manager | Iowa |
| 11 | Janet C. Gibson | 52 | Wife | Physician | Colorado |
| 12 | Clark A. Gibson | 21 | Son | Salesman | Colorado |
| 13 | William B. Gibson | 16 | Son | — | Colorado |
| 14 | Agnes D. Clarke | 82 | Mother-in-law | — | Scotland |
| 15 | George L. Russell | 52 | Head | Gen. Manager | Illinois |
| 16 | Leona B. Russell | 48 | Wife | — | Kansas |
| 17 | Max B. Russell | 27 | Son | Salesman | Colorado |
| 18 | Alpheus Bacher | 69 | Head | Auctioneer | Tennessee |
| 19 | Ida E. Bacher | 58 | Wife | — | Indiana |
| 20 | Clarence E. Hanna | 43 | Head | Proprietor | Illinois |
| 21 | Myrtle B. Hanna | 45 | Wife | — | Illinois |
| 22 | Russell M. Hanna | 17 | Son | Electrician Helper | Kansas |
| 23 | Harry L. Elliott | 39 | Head | Production Man | Illinois |
| 24 | Lura B. Elliott | 39 | Wife | — | Iowa |
| 25 | D. Kenneth Elliott | 16 | Son | — | Iowa |
| 26 | A. Geraldine Elliott | 3 | Daughter | — | Iowa |
| 27 | Melvin J. Lucas | 25 | Head | Agent | Colorado |
| 28 | Hazel Lucas | 21 | Wife | — | Missouri |
| 29 | John R. Lavik | 49 | Head | Clergyman | Minnesota |
| 30 | Sophie B. Lavik | 52 | Wife | — | Minnesota |
| 31 | Rolf A. Lavik | 22 | Son | — | North Dakota |
| 32 | Valborg B. Lavik | 20 | Daughter | — | North Dakota |
| 33 | Norma M. Lavik | 18 | Daughter | — | Canada-English |
| 34 | Paul S. Lavik | 15 | Son | — | Canada-English |
| 35 | Percy G. Markham | 63 | Head | Manager | England |
| 36 | Emma C. Markham | 58 | Wife | — | West Virginia |
| 37 | Paul H. Markham | 22 | Son | — | Colorado |
| 38 | George J. Mclaughlin | 49 | Head | Laborer | Iowa |
| 39 | Zella F. Mclaughlin | 44 | Wife | — | Missouri |
| 40 | Melvin R. Mclaughlin | 16 | Son | — | Kansas |
| 41 | Earl Robinson THIS PERSON | 38 | Head | Contractor | Illinois |
| 42 | Mary M. Robinson | 28 | Wife | — | Alabama |
| 43 | Benjamin E. Robinson | 7 | Son | — | Colorado |
| 44 | Carl Ritter | 17 | Lodger | Carpenter Helper | Colorado |
| 45 | Frank R. Hollenback | 57 | Head | Clergyman | Illinois |
| 46 | Eva A. Hollenback | 56 | Wife | — | Nebraska |
| 47 | Franklin R. Hollenback | 19 | Son | — | Colorado |
| 48 | Harry F. Keeler | 53 | Head | Retail Merchant | New York |
| 49 | Mabel E. Keeler | 54 | Wife | — | Ohio |
| 50 | Elizabeth A. Keeler | 18 | Daughter | — | Colorado |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1930 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)