JG
John Grant — 1920 US Census Record
Model Tree available1920 United States Federal Census · Boulder, Colorado
Our Model Tree links this John Grant across the 1900, 1910 and 1920 US Censuses in Boulder, Colorado (XGBoost, ~Confirmed), with identified parents Donald & Donald — first a son (b.~1889), then head of a 3-person household.
Age 31
b. ~1889
Male
Son
Born: Kansas
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Boulder, Colorado |
| Surname | Grant |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Additional Details | |
| Occupation | salesman |
| Industry | coal mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Occupation | Salesman |
| Township / Ward | Boulder City |
| Est. Birth Year | ~1889 |
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 1920 census.
| Name | Relation to head | Relative to John | Age | Birth yr |
|---|---|---|---|---|
| Isabel Grant | Head | — | 53 | ~1867 |
| Alexander Grant | Son | — | 29 | ~1891 |
| John Grant | Son | — | 31 | ~1889 |
Census Appearances
1900
Boulder, Colorado
Son, age 12
Boulder, Colorado · implied b. ~1888 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grant |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 12 |
| Marital Status | Single |
| Birthplace | Kansas |
| Birth Month | Apr |
| Birth Year | 1888 |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | At school |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1910
Boulder, Colorado
Son, age 21
Boulder, Colorado · implied b. ~1889 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Grant |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1920
Boulder, Colorado
Son, age 31
Boulder, Colorado · implied b. ~1889 — 3 household members
| Surname | Grant |
| Given Name | John |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 31 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Scotland |
| Mother's Birthplace | Scotland |
| Occupation | salesman |
| Industry | coal mine |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| 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 John Grant across 3 US Census years (1900, 1910 and 1920) in Boulder, Colorado, using XGBoost record linkage. Identified parents: father Donald Grant (~0.92 confidence) and father Donald Grant (~0.92 confidence) and mother Isabel Grant (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Donald Grant
b. ~1855
Source father
● Household
· direct · ~0.92
Father
Donald Grant
b. ~1862
Source father
● Household
· direct · ~0.92
Mother
Isabel Grant
b. ~1867
Source mother
● Household
· direct · ~0.92
This person
Anchor record
John Grant
Son · 1920 · age 31 · b. ~1889 · Colorado
★ You are viewing this record
Sibling
Alexander Grant
Sibling · 1920 · age 29
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
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:0422)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Helen M. | 14 | Daughter | None | Colorado |
| 2 | Nellie Hall | 60 | Mother-in-law | Dressmaker | Vermont |
| 3 | Arthur Parrish | 39 | Head | Laborer | Iowa |
| 4 | Veronica Parrish | 28 | Wife | None | Colorado |
| 5 | Goldie I. Parrish | 7 | Daughter | None | Kansas |
| 6 | Eugene Parrish | 2 | Son | None | Kansas |
| 7 | John B. Ekeley | 51 | Head | Professor | Sweden |
| 8 | Adelaide Ekeley | 50 | Wife | None | New York |
| 9 | William J. Baird | 58 | Head | Physician | Alabama |
| 10 | Maude Baird | 41 | Wife | None | Iowa |
| 11 | James Baird | 8 | Son | None | Colorado |
| 12 | John Baird | 7 | Son | None | Colorado |
| 13 | Janet Baird | 5 | Daughter | None | Colorado |
| 14 | James E. Park | 56 | Head | Cashier | Iowa |
| 15 | Mary B. Park | 50 | Wife | None | Iowa |
| 16 | Harriett E. Bacon | 77 | Mother-in-law | None | Connecticut |
| 17 | James B. Quinlan | 49 | Head | Agent | Indiana |
| 18 | Virginia Quinlan | 49 | Wife | None | Missouri |
| 19 | Elizabeth Quinlan | 25 | Daughter | None | Missouri |
| 20 | Marian Quinlan | 23 | Daughter | None | Missouri |
| 21 | J. B. Jr. Quinlan | 19 | Son | None | Missouri |
| 22 | Ernest W. Copps | 67 | Head | None | New York |
| 23 | Matilda Copps | 67 | Wife | None | New York |
| 24 | Amy Copps | 35 | Daughter | None | New York |
| 25 | Phoebe Copps | 40 | Daughter | Teacher | New York |
| 26 | Isabel Grant | 53 | Head | None | Scotland |
| 27 | John Grant THIS PERSON | 31 | Son | Salesman | Kansas |
| 28 | Alexander Grant | 29 | Son | Salesman | Colorado |
| 29 | Grant | 23 | Daughter | Bookkeeper | Colorado |
| 30 | De Witt Simmons | 29 | Head | Agent | Wisconsin |
| 31 | Mabel Simmons | 28 | Wife | None | Iowa |
| 32 | Marion Simmons | 2 | Son | None | Colorado |
| 33 | William E. Binder | 53 | Head | Clerk | Pennsylvania |
| 34 | Margaret Binder | 44 | Wife | None | Indiana |
| 35 | Margaret S. Binder | 12 | Daughter | None | Colorado |
| 36 | Fredric E. Clark | 41 | Head | None | Kentucky |
| 37 | Andrew G. Clark | 14 | Son | None | Indiana |
| 38 | Clark H. Clark | 15 | Son | None | Indiana |
| 39 | Mary S. Giles | 69 | Mother | None | Ohio |
| 40 | Warren C. Dyer | 64 | Head | Agent | Maine |
| 41 | Mollie Dyer | 58 | Wife | None | Tennessee |
| 42 | Lura D. Coulson | 34 | Daughter | X-Ray Tech | Colorado |
| 43 | Katharine Coulson | 10 | Grandchild | None | Colorado |
| 44 | Constance Coulson | 9 | Grandchild | None | Colorado |
| 45 | Arthur P. Fosbrook | 55 | Head | Proprietor | New Jersey |
| 46 | Alice Fosbrook | 49 | Wife | None | England |
| 47 | Arthur Fosbrook | 10 | Son | Secretary | Colorado |
| 48 | Carrie Hansen | 71 | Head | None | Norway |
| 49 | Hansen | 38 | Daughter | None | South Dakota |
| 50 | Hansen | 47 | Head | None | New York |
Pedigree Summary
John + 1 sibling
Gen 1 · 3 parents
~0.92
Max depth 4 (1900–1950 window)
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)