MH
Mary Harmon — 1930 US Census Record
Linked across censuses1930 United States Federal Census · Boulder, Colorado
Our Model Tree links this Mary Harmon across the 1920 and 1930 US Censuses in Boulder, Colorado (XGBoost, ~Confirmed) — first a spouse (b.~1870), then head of a 19-person household.
Age 60
b. ~1870
Female
Spouse
Born: Pennsylvania
Married
1930 Census Record Details
| Census Year | 1930 |
| Location | Boulder, Colorado |
| Surname | Harmon |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 22 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Additional Details | |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | Election Precinct 9 |
| Est. Birth Year | ~1870 |
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.
19 people recorded at the same address in the 1930 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Anna Machek | Daughter | — | 20 | ~1910 |
| Julia Harmon | Daughter | — | 33 | ~1897 |
| Annie Hasquer | Daughter | — | 19 | ~1911 |
| Wilma Vance | Daughter | — | 16 | ~1914 |
| Edward Hasquer | Head | — | 52 | ~1878 |
| James Machek | Other | — | 50 | ~1880 |
| W Harmon | Other | — | 63 | ~1867 |
| Wilson Harmon | Other | — | 67 | ~1863 |
| William Etcheils | Other | — | 78 | ~1852 |
| Clarence Vance | Other | — | 40 | ~1890 |
| Kenneth Vance | Son | — | 12 | ~1918 |
| Clarence Vance | Son | — | 19 | ~1911 |
| William Etcheils | Son | — | 48 | ~1882 |
| Margaret Harmon | Spouse | — | 59 | ~1871 |
| Gladys Vance | Spouse | — | 40 | ~1890 |
| Mary Hasquer | Spouse | — | 48 | ~1882 |
| Mary Harmon | Spouse | — | 60 | ~1870 |
| Mary Machek | Spouse | — | 48 | ~1882 |
| Sarah Etcheils | Spouse | — | 76 | ~1854 |
Census Appearances
1920
Boulder, Colorado
Spouse, age 50
Boulder, Colorado · implied b. ~1870 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Harmon |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 50 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1930
Boulder, Colorado
Spouse, age 60
Boulder, Colorado · implied b. ~1870 — 19 household members
| Surname | Harmon |
| Given Name | Mary L. |
| Relationship to Head | Wife |
| Sex | F |
| Color / Race | White |
| Age | 60 |
| Marital Status | Married |
| Birthplace | Pennsylvania |
| Age at First Marriage | 22 |
| Father's Birthplace | Wales |
| Mother's Birthplace | Wales |
| Can Read/Write | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
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 Mary Harmon across 2 US Census years (1920 and 1930) in Boulder, Colorado, using XGBoost record linkage.
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This person
Anchor record
Mary Harmon
Spouse · 1930 · age 60 · b. ~1870 · 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:1930:15thcensus230unit:0851)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Pearl | 10 | Step-daughter | — | Mexico |
| 2 | Tony Casillas | 36 | Head | Laborer | Mexico |
| 3 | Cirila Casillas | 31 | Wife | — | New Mexico |
| 4 | Carmen Casillas | 10 | Daughter | — | Colorado |
| 5 | Manuel Casillas | 8 | Son | — | Colorado |
| 6 | Dionicio Casillas | 6 | Son | — | Colorado |
| 7 | Eleanor Casillas | 4 | Daughter | — | Colorado |
| 8 | Adelina Casillas | 2 | Daughter | — | Colorado |
| 9 | Peter Vogel | 37 | Head | Laborer | Colorado |
| 10 | Jennie Vogel | 30 | Wife | — | Ohio |
| 11 | Clarence Vogel | 12 | Son | — | Colorado |
| 12 | Florence Vogel | 10 | Daughter | — | Colorado |
| 13 | Roy S. Crawford | 33 | Head | Laborer | Missouri |
| 14 | Lula M. Crawford | 33 | Wife | — | Missouri |
| 15 | Lydia E. Crawford | 10 | Daughter | — | Missouri |
| 16 | Velma L. Crawford | 8 | Daughter | — | Missouri |
| 17 | Roy S. Jr. Crawford | 3 | Son | — | Colorado |
| 18 | Silvio Depra | 62 | Head | Farmer | Austria |
| 19 | Catherine Depra | 50 | Wife | — | Austria |
| 20 | Gilbert Depra | 19 | Son | — | Colorado |
| 21 | Joseph Depra | 17 | Son | — | Colorado |
| 22 | Catherine Depra | 12 | Daughter | — | Colorado |
| 23 | Emanuel Depra | 10 | Son | — | Colorado |
| 24 | Orsola Depra | 6 | Son | — | Colorado |
| 25 | Joe Stanich | 38 | Head | Farmer | Austria |
| 26 | Frances Stanich | 32 | Wife | — | Austria |
| 27 | Frances Stanich | 9 | Daughter | — | Colorado |
| 28 | Mary Stanich | 8 | Daughter | — | Colorado |
| 29 | Joe Stanich | 7 | Son | — | Colorado |
| 30 | William Stanich | 5 | Son | — | Colorado |
| 31 | Josephine Stanich | 3 | Daughter | — | Colorado |
| 32 | Edward Hasquer | 52 | Head | Farmer | Czechoslovakia |
| 33 | Mary Hasquer | 48 | Wife | — | Czechoslovakia |
| 34 | Annie Hasquer | 19 | Daughter | — | Colorado |
| 35 | James Machek | 50 | O | Farmer | Czechoslovakia |
| 36 | Mary Machek | 48 | Wife | — | Czechoslovakia |
| 37 | Anna Machek | 20 | Daughter | — | Colorado |
| 38 | William Etcheils | 78 | O | — | England |
| 39 | Sarah Etcheils | 76 | Wife | — | England |
| 40 | William Jr. Etcheils | 48 | Son | Laborer | England |
| 41 | W. H. Harmon | 63 | O | Farmer | Colorado |
| 42 | Margaret Harmon | 59 | Wife | — | England |
| 43 | Clarence A. Vance | 40 | O | Farmer | Colorado |
| 44 | Gladys Vance | 40 | Wife | — | Colorado |
| 45 | Clarence Jr. Vance | 19 | Son | — | Colorado |
| 46 | Wilma Vance | 16 | Daughter | — | Colorado |
| 47 | Kenneth Vance | 12 | Son | — | Colorado |
| 48 | Wilson M. Harmon | 67 | O | Farmer | Colorado |
| 49 | Mary L. Harmon THIS PERSON | 60 | Wife | — | Pennsylvania |
| 50 | Julia L. Harmon | 33 | Daughter | Teacher | 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)