DC
David Clark — 1920 US Census Record
Linked across censuses1920 United States Federal Census · Allegheny, Pennsylvania
Our Model Tree links this David Clark across the 1910 and 1920 US Censuses in Allegheny, Pennsylvania (XGBoost, ~Confirmed) — first a son (b.~1902), then head of a 15-person household.
Age 18
b. ~1902
Male
Son
Born: Pennsylvania
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Allegheny, Pennsylvania |
| Surname | Clark |
| Given Name | David L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Additional Details | |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
| Township / Ward | North Versailles Township Precinct 1 |
| Est. Birth Year | ~1902 |
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.
15 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to David | Age | Birth yr |
|---|---|---|---|---|
| Katherine Clark | Daughter | — | 8 | ~1912 |
| Robert Clark | Son | — | 14 | ~1906 |
| Martha Clark | Daughter | — | 20 | ~1900 |
| David Clark | Son | — | 18 | ~1902 |
| David Clark | Head | — | 55 | ~1865 |
| Charles Clark | Son | — | 11 | ~1909 |
| Dorothy Clark | Daughter | — | 10 | ~1910 |
| Harold Clark | Son | — | 26 | ~1894 |
| Martha Clark | Spouse | — | 53 | ~1867 |
| John Koltiska | Other | — | 26 | ~1894 |
| Joseph Clark | Son | — | 7 | ~1913 |
| Alice Clark | Daughter | — | 7 | ~1913 |
| Margaret Clark | Daughter | — | 16 | ~1904 |
| Lucy Clark | Daughter | — | 22 | ~1898 |
| Carrie Spelger | Other | — | 47 | ~1873 |
Census Appearances
1910
Allegheny, Pennsylvania
Son, age 7
Allegheny, Pennsylvania · implied b. ~1903 — 6 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Delvon |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Birth State | Pennsylvania |
| Birth Country | United States |
| Birthplace (normalized) | pennsylvania |
1920
Allegheny, Pennsylvania
Son, age 18
Allegheny, Pennsylvania · implied b. ~1902 — 15 household members
| Surname | Clark |
| Given Name | David L |
| Relationship to Head | Son |
| Sex | M |
| Color / Race | White |
| Age | 18 |
| Marital Status | Single |
| Birthplace | Pennsylvania |
| Father's Birthplace | Pennsylvania |
| Mother's Birthplace | Pennsylvania |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | 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 David Clark across 2 US Census years (1910 and 1920) in Allegheny, Pennsylvania, using XGBoost record linkage.
Show:
This person
Anchor record
David Clark
Son · 1920 · age 18 · b. ~1902 · Pennsylvania
★ You are viewing this record
Sibling
Joseph Clark
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Charles Clark
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Dorothy Clark
Sibling · 1920 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Clark
Sibling · 1920 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Martha Clark
Sibling · 1920 · age 20
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Harold Clark
Sibling · 1920 · age 26
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Clark
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Alice Clark
Sibling · 1920 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lucy Clark
Sibling · 1920 · age 22
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Katherine Clark
Sibling · 1920 · age 8
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 — Allegheny, Pennsylvania
Open full size
1920 US Federal Census — Allegheny, Pennsylvania
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu1516unit:0153)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Margaret Volk | 45 | Wife | — | Germany |
| 52 | Hilda Volk | 20 | Daughter | Stenographer | Pennsylvania |
| 53 | Carl Volk | 18 | Son | Florist | Pennsylvania |
| 54 | Louis Volk | 11 | Son | — | Pennsylvania |
| 55 | Edward Wagner | 58 | Head | Machinist | Germany |
| 56 | Mary E Wagner | 57 | Wife | — | Ohio |
| 57 | Margaret Wagner | 25 | Daughter | Teacher | Pennsylvania |
| 58 | Elizabeth A Wagner | 22 | Daughter | Stenographer | Pennsylvania |
| 59 | Alice E Wagner | 20 | Daughter | Stenographer | Pennsylvania |
| 60 | Louisa Penney | 79 | Mother-in-law | — | Ohio |
| 61 | Seymour Mount | 24 | Head | Chauffeur | Georgia |
| 62 | Birdie Mount | 24 | Wife | — | Virginia |
| 63 | David L Clark | 55 | Head | Candy Manufacturer | Pennsylvania |
| 64 | Martha Clark | 53 | Wife | — | Pennsylvania |
| 65 | Harold J Clark | 26 | Son | Candy Maker | Pennsylvania |
| 66 | Lucy B Clark | 22 | Daughter | — | Pennsylvania |
| 67 | Martha R Clark | 20 | Daughter | — | Pennsylvania |
| 68 | David L Clark THIS PERSON | 18 | Son | — | Pennsylvania |
| 69 | Margaret M Clark | 16 | Daughter | — | Pennsylvania |
| 70 | Robert G Clark | 14 | Son | — | California |
| 71 | Charles Clark | 11 | Son | — | Pennsylvania |
| 72 | Dorothy V Clark | 10 | Daughter | — | Pennsylvania |
| 73 | Katherine R Clark | 8 | Daughter | — | Pennsylvania |
| 74 | Joseph F Clark | 7 | Son | — | Pennsylvania |
| 75 | Alice F Clark | 7 | Daughter | — | Pennsylvania |
| 76 | John Koltiska | 26 | Farmer | Farmer | Austria-Hungary |
| 77 | Carrie Spelger | 47 | Sister-in-law | Book-Keeper | Pennsylvania |
| 78 | John C Eckert | 25 | Head | Carpenter | Pennsylvania |
| 79 | John Horvath | 36 | Head | Laborer | Hungary |
| 80 | Rose Horvath | 28 | Wife | — | Hungary |
| 81 | Julia Horvath | 10 | Daughter | — | Pennsylvania |
| 82 | Michael Horvath | 5 | Son | — | Pennsylvania |
| 83 | John Horvath | 3 | Son | — | Pennsylvania |
| 84 | Helen Horvath | 1 | Daughter | — | Pennsylvania |
| 85 | Hannie Dayton | 33 | Head | — | Pennsylvania |
| 86 | Vincent C Dayton | 16 | Son | — | Ohio |
| 87 | Charles W Dayton | 14 | Son | — | Ohio |
| 88 | Helen Dayton | 10 | Daughter | — | Ohio |
| 89 | Evelyn Dayton | 5 | Daughter | — | Ohio |
| 90 | William Dayton | 6 | Son | — | Ohio |
| 91 | Frank Brown | 26 | Boarder | Miner | Russian Poland |
| 92 | Joseph Gudack | 24 | Boarder | Miner | Croatia |
| 93 | Hilda Smith | 16 | Maid | Maid | Switzerland |
| 94 | Ernest Witschi | 21 | Boarder | Farmer | Switzerland |
| 95 | Sarah Morrison | 28 | Aunt | — | Pennsylvania |
| 96 | Daniel H Malone | 53 | Head | Laborer | Pennsylvania |
| 97 | Hannah M Malone | 46 | Wife | — | Pennsylvania |
| 98 | Alfred T Tong | 52 | Head | Laborer | England |
| 99 | Alice A Tong | 47 | Wife | — | England |
| 100 | Clarence Tong | 23 | Daughter | Saleslady | Pennsylvania |
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)