MC
Mary Campbell — 1920 US Census Record
Model Tree available1920 United States Federal Census · St Clair, Illinois
Our Model Tree links this Mary Campbell across the 1900, 1910 and 1920 US Censuses in St Clair, Illinois (XGBoost, ~Confirmed), with identified parents Alexander & Alex — first a daughter (b.~1899), then head of a 9-person household.
Age 21
b. ~1899
Female
Daughter
Born: Kansas
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | St Clair, Illinois |
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | clerk |
| Industry | Dry Goods |
| Class of Worker | w |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
| Occupation | Clerk |
| Township / Ward | Ofallon City |
| Est. Birth Year | ~1899 |
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.
9 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Campbell | Daughter | — | 21 | ~1899 |
| Mabel Campbell | Daughter | — | 18 | ~1902 |
| Edna Campbell | Daughter | — | 14 | ~1906 |
| Mildred Campbell | Daughter | — | 11 | ~1909 |
| Alex Campbell | Head | — | 54 | ~1866 |
| John Creed | Other | — | 37 | ~1883 |
| Joseph Campbell | Son | — | 30 | ~1890 |
| Lester Campbell | Son | — | 16 | ~1904 |
| Lula Campbell | Spouse | — | 53 | ~1867 |
Census Appearances
1900
St Clair, …
Daughter, age 2
St Clair, Illinois · implied b. ~1898 — 2 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 1 |
| Marital Status | Single |
| Birthplace | Kansas |
| Birth Month | Aug |
| Birth Year | 1898 |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1910
St Clair, …
Daughter, age 11
St Clair, Illinois · implied b. ~1899 — 13 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 11 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Kansas |
| Birth Country | United States |
| Birthplace (normalized) | kansas |
1920
St Clair, …
Daughter, age 21
St Clair, Illinois · implied b. ~1899 — 9 household members
| Surname | Campbell |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 21 |
| Marital Status | Single |
| Birthplace | Kansas |
| Father's Birthplace | Illinois |
| Mother's Birthplace | Illinois |
| Occupation | clerk |
| Industry | Dry Goods |
| 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 Mary Campbell across 3 US Census years (1900, 1910 and 1920) in St Clair, Illinois, using XGBoost record linkage. Identified parents: father Alexander Campbell (~0.92 confidence) and father Alex Campbell (~0.92 confidence) and mother Lula Campbell (~0.92 confidence) and mother Lula Campbell (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Alexander Campbell
b. ~1857
Source father
● Household
· direct · ~0.92
Father
Alex Campbell
b. ~1866
Source father
● Household
· direct · ~0.92
Mother
Lula Campbell
b. ~1861
Source mother
● Household
· direct · ~0.92
Mother
Lula Campbell
b. ~1867
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Campbell
Daughter · 1920 · age 21 · b. ~1899 · Illinois
★ You are viewing this record
Sibling
Mildred Campbell
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lester Campbell
Sibling · 1920 · age 16
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edna Campbell
Sibling · 1920 · age 14
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Joseph Campbell
Sibling · 1920 · age 30
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Mabel Campbell
Sibling · 1920 · age 18
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 — St Clair, Illinois
Open full size
1920 US Federal Census — St Clair, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu405unit:0876)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Eva Davis | 34 | wife | None | Illinois |
| 2 | Lillian Davis | 16 | daughter | None | Illinois |
| 3 | Arline Davis | 6 | daughter | None | Illinois |
| 4 | La Doris Davis | 1 | daughter | None | Illinois |
| 5 | Alex Campbell | 54 | head | Miner | Illinois |
| 6 | Lula Campbell | 53 | wife | None | Illinois |
| 7 | Joseph Campbell | 30 | son | Miner | Illinois |
| 8 | Mary Campbell THIS PERSON | 21 | daughter | Clerk | Kansas |
| 9 | Mabel Campbell | 18 | daughter | None | Illinois |
| 10 | Lester Campbell | 16 | son | None | Illinois |
| 11 | Edna Campbell | 14 | daughter | None | Illinois |
| 12 | Mildred Campbell | 11 | daughter | None | Illinois |
| 13 | John Creed | 37 | boarder | Miner | Illinois |
| 14 | Charles O. Pearson | 25 | head | Miner | Illinois |
| 15 | Janet Pearson | 24 | wife | None | Kansas |
| 16 | Bernadine Pearson | 2 | daughter | None | Illinois |
| 17 | Joseph Mueller | 45 | head | Agent | Illinois |
| 18 | Jessie Mueller | 37 | wife | None | Illinois |
| 19 | Dewey Mueller | 21 | son | None | Illinois |
| 20 | Bernice Mueller | 19 | daughter | None | Illinois |
| 21 | Edward E. Schwarz | 28 | head | Merchant | Illinois |
| 22 | Hazel Schwarz | 24 | wife | None | Kansas |
| 23 | Mildred Schwarz | 3 | daughter | None | Illinois |
| 24 | John G. Martin | 58 | head | Painter | Illinois |
| 25 | Mary Martin | 57 | wife | None | Illinois |
| 26 | Marie Martin | 24 | daughter | Clerk | Illinois |
| 27 | John Martin | 18 | son | Laborer | Illinois |
| 28 | Jacob Wernicke | 33 | head | Cupola Man | Illinois |
| 29 | Amelia Wernicke | 29 | wife | None | Illinois |
| 30 | Harriett Peach | 67 | head | None | Illinois |
| 31 | Nellie Pursuance | 63 | sister | None | Illinois |
| 32 | Charles Door | 38 | head | Engineer | Illinois |
| 33 | Margaret Door | 38 | wife | None | Pennsylvania |
| 34 | John Door | 12 | son | None | Illinois |
| 35 | Helen Door | 9 | daughter | None | Illinois |
| 36 | Wilbur Mcintire | 28 | head | Miner | Indiana |
| 37 | Arlene Mcintire | 35 | wife | None | Illinois |
| 38 | Willard Mcintire | 4 | son | None | Illinois |
| 39 | Carroll Mcintire | 2 | son | None | Illinois |
| 40 | Laura Dillon | 66 | head | None | Mississippi |
| 41 | Abby Dillon | 35 | Public School | Teacher | Missouri |
| 42 | Aura L. Dillon | 26 | Public School | Teacher | Missouri |
| 43 | Andrew J. Dougherty | 52 | head | Merchant | Illinois |
| 44 | Fannie Dougherty | 50 | wife | None | Illinois |
| 45 | George Middows | 30 | head | Miner | Illinois |
| 46 | Jennetta Middows | 25 | wife | None | Oklahoma |
| 47 | Hazel Middows | 4 | daughter | None | Illinois |
| 48 | Blanch Middows | 6 | daughter | None | Illinois |
| 49 | Emma Evans | 57 | mother-in-law | None | England |
| 50 | George Blackett | 36 | head | Miner | England |
Pedigree Summary
Mary + 5 siblings
Gen 1 · 4 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)