JH
James Hamilton — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Boulder, Colorado
Our Model Tree links this James Hamilton across the 1910, 1920 and 1930 US Censuses in Boulder, Colorado (XGBoost, ~Confirmed) — first a head (b.~1876), then head of a 8-person household.
Age 44
b. ~1876
Male
Head
Born: Colorado
Married
1920 Census Record Details
| Census Year | 1920 |
| Location | Boulder, Colorado |
| Surname | Hamilton |
| Given Name | James C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Colorado |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Additional Details | |
| Occupation | Real Estate |
| Industry | Own Office |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
| Occupation | Real Estate |
| Township / Ward | Precinct 36 South Boulder |
| Est. Birth Year | ~1876 |
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.
8 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to James | Age | Birth yr |
|---|---|---|---|---|
| Lois Hamilton | Daughter | — | 15 | ~1905 |
| Elsie Hamilton | Daughter | — | 12 | ~1908 |
| James Hamilton | Head | — | 44 | ~1876 |
| Julius Hamilton | Son | — | 17 | ~1903 |
| James Hamilton | Son | — | 10 | ~1910 |
| Floyd Hamilton | Son | — | 13 | ~1907 |
| Walter Hamilton | Son | — | 3 | ~1917 |
| Jennie Hamilton | Spouse | — | 42 | ~1878 |
Census Appearances
1910
Boulder, Colorado
Head, age 34
Boulder, Colorado · implied b. ~1876 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | James C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 34 |
| Marital Status | Married |
| Birthplace | Colorado |
| Years Married | 10 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Farmer |
| Industry | General Farm |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1920
Boulder, Colorado
Head, age 44
Boulder, Colorado · implied b. ~1876 — 8 household members
| Surname | Hamilton |
| Given Name | James C |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 44 |
| Marital Status | Married |
| Birthplace | Colorado |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Missouri |
| Occupation | Real Estate |
| Industry | Own Office |
| Class of Worker | OA |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Home Owned/Rented | R |
| Birth State | Colorado |
| Birth Country | United States |
| Birthplace (normalized) | colorado |
1930
Boulder, Colorado
Head, age 54
Boulder, Colorado · implied b. ~1876 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Hamilton |
| Given Name | Jesse C. |
| Relationship to Head | Head |
| Sex | M |
| Color / Race | White |
| Age | 54 |
| Marital Status | Married |
| Birthplace | Colorado |
| Age at First Marriage | 24 |
| Father's Birthplace | Missouri |
| Mother's Birthplace | Virginia |
| Occupation | Janitor |
| Industry | Baptist Church |
| Class of Worker | W |
| Can Read/Write | Yes |
| Home Owned/Rented | R |
| Home Value / Rent | 25 |
| 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 James Hamilton across 3 US Census years (1910, 1920 and 1930) in Boulder, Colorado, using XGBoost record linkage.
Show:
This person
Anchor record
James Hamilton
Head · 1920 · age 44 · b. ~1876 · Colorado
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Confirmed / household (~0.90+)
Probable / derived (~0.65–0.89)
Candidate (<0.65, unverified)
Original Census Page
1920 US Federal Census — Boulder, Colorado
Open full size
1920 US Federal Census — Boulder, Colorado
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu156unit:0323)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Jennie Smith | 49 | Head | Manager | Illinois |
| 52 | Edwin L Smith | 9 | Son | — | Colorado |
| 53 | William H Macey | 62 | Head | Teamster | Arkansas |
| 54 | Lena L Macey | 18 | Daughter | — | Arkansas |
| 55 | Beulah M Macey | 8 | Daughter | — | Arkansas |
| 56 | Maybelle B Listenby | 70 | Housekeeper | Housekeeper | Illinois |
| 57 | Francis W Woolley | 59 | Head | Merchant | Wisconsin |
| 58 | Catherine A Woolley | 58 | Wife | — | Pennsylvania |
| 59 | Bernard J Broothuis | 40 | Head | Fireman | Germany |
| 60 | Alma E Broothuis | 36 | Wife | — | Iowa |
| 61 | Bessie Broothuis | 15 | Daughter | — | Iowa |
| 62 | Clara Broothuis | 13 | Daughter | — | Iowa |
| 63 | John F Broothuis | 6 | Son | — | Colorado |
| 64 | William J Specht | 39 | Head | Mechanic | Illinois |
| 65 | Clara B Specht | 37 | Wife | — | Colorado |
| 66 | William B Specht | 10 | Son | — | Colorado |
| 67 | Harold W Specht | 6 | Son | — | Colorado |
| 68 | Elizabeth H Specht | 4 | Daughter | — | Colorado |
| 69 | Fred B Praeger | 55 | Head | Real Estate | Colorado |
| 70 | Agnes H Praeger | 24 | Wife | — | Iowa |
| 71 | Kathleen E Praeger | 2 | Daughter | — | Colorado |
| 72 | Fred, Jr. Praeger | 1 | Son | — | Colorado |
| 73 | Dorothy J Praeger | 0 | Daughter | — | Colorado |
| 74 | Ruth E Miller | 20 | Servant | Servant | Nebraska |
| 75 | James C Hamilton THIS PERSON | 44 | Head | Real Estate | Colorado |
| 76 | Jennie L Hamilton | 42 | Wife | — | Colorado |
| 77 | Julius G Hamilton | 17 | Son | — | Colorado |
| 78 | Lois M Hamilton | 15 | Daughter | — | Colorado |
| 79 | Floyd E Hamilton | 13 | Son | — | Colorado |
| 80 | Elsie F Hamilton | 12 | Daughter | — | Colorado |
| 81 | James R Hamilton | 10 | Son | — | Colorado |
| 82 | Walter H Hamilton | 3 | Son | — | Colorado |
| 83 | Walter E Harris | 27 | Head | Farmer | Nebraska |
| 84 | Ruth U Harris | 31 | Wife | — | Iowa |
| 85 | Mildred J Harris | 4 | Daughter | — | Colorado |
| 86 | Lora M Harris | 1 | Daughter | — | Colorado |
| 87 | Cornelius M Baerseldt | 33 | Head | Salesman | Holland |
| 88 | Myrtle R Baerseldt | 36 | Wife | — | Missouri |
| 89 | Grace M Baerseldt | 10 | Daughter | — | Chicago |
| 90 | Clarence M Baerseldt | 7 | Son | — | Wisconsin |
| 91 | Irving H Bunn | 45 | Head | Superintendent | Connecticut |
| 92 | Daisy K Bunn | 38 | Wife | Instructor | Wisconsin |
| 93 | Isaac B Flora | 73 | Head | Janitor | Indiana |
| 94 | Mary J Flora | 70 | Wife | — | Virginia |
| 95 | Helene R Ringelman | 51 | Head | Salesman | Illinois |
| 96 | Margaret Ringelman | 51 | Wife | Dressmaker | Illinois |
| 97 | E. Mae Ringelman | 18 | Son | — | Illinois |
| 98 | Margaret Ringelman | 9 | Daughter | — | Illinois |
| 99 | Alexander Ringelman | 8 | Son | — | Illinois |
| 100 | John O Ringelman | 47 | Head | — | Scotland |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1920 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)