MC
Mary Carroll — 1920 US Census Record
Model Tree available1920 United States Federal Census · Sacramento, California
Our Model Tree links this Mary Carroll across the 1900, 1910 and 1920 US Censuses in Sacramento, California (XGBoost, ~Confirmed), with identified parents Patrick & Patrick — first a daughter (b.~1900), then head of a 6-person household.
Age 20
b. ~1900
Female
Daughter
Born: California
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Sacramento, California |
| Surname | Carroll |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Additional Details | |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
| Township / Ward | Precinct Twenty Four |
| Est. Birth Year | ~1900 |
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.
6 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Kathryn Carroll | Daughter | — | 15 | ~1905 |
| Mary Carroll | Daughter | — | 20 | ~1900 |
| Patrick Carroll | Head | — | 47 | ~1873 |
| Daniel Carroll | Son | — | 9 | ~1911 |
| Thomas Carroll | Son | — | 11 | ~1909 |
| Matthew Carroll | Son | — | 17 | ~1903 |
Census Appearances
1900
Sacramento, California
Daughter, age 1
Sacramento, California · implied b. ~1899 — 3 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Mary E |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 0 |
| Marital Status | Single |
| Birthplace | California |
| Birth Month | Oct |
| Birth Year | 1899 |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1910
Sacramento, California
Daughter, age 10
Sacramento, California · implied b. ~1900 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Carroll |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 10 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
1920
Sacramento, California
Daughter, age 20
Sacramento, California · implied b. ~1900 — 6 household members
| Surname | Carroll |
| Given Name | Mary |
| Relationship to Head | daughter |
| Sex | F |
| Color / Race | White |
| Age | 20 |
| Marital Status | Single |
| Birthplace | California |
| Father's Birthplace | Ireland |
| Mother's Birthplace | Ireland |
| Occupation | none |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | California |
| Birth Country | United States |
| Birthplace (normalized) | california |
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 Carroll across 3 US Census years (1900, 1910 and 1920) in Sacramento, California, using XGBoost record linkage. Identified parents: father Patrick Carroll (~0.92 confidence) and father Patrick Carroll (~0.92 confidence) and mother Delia Carroll (~0.92 confidence). The pedigree spans 1 generation with 3 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
Patrick Carroll
b. ~1872
Source father
● Household
· direct · ~0.92
Father
Patrick Carroll
b. ~1873
Source father
● Household
· direct · ~0.92
Mother
Delia Carroll
b. ~1876
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Carroll
Daughter · 1920 · age 20 · b. ~1900 · California
★ You are viewing this record
Sibling
Kathryn Carroll
Sibling · 1920 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Daniel Carroll
Sibling · 1920 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Carroll
Sibling · 1920 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Matthew Carroll
Sibling · 1920 · age 17
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 — Sacramento, California
Open full size
1920 US Federal Census — Sacramento, California
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu126unit:0265)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Mullen Frieda Mullen | 30 | wife | None | California |
| 52 | Thomas Gannon | 75 | Head | None | Wisconsin |
| 53 | Lee Gannon | 37 | wife | Tax Expert | Pennsylvania |
| 54 | Thomas Gannon | 27 | son | None | Wisconsin |
| 55 | Mildred Watts | 38 | Head | None | California |
| 56 | Mary Sprague | 68 | mother | None | Canada |
| 57 | Delbert Sprague | 32 | brother | Cook | California |
| 58 | Henry T Burns | 43 | Head | Manager | California |
| 59 | Kathryn Burns | 40 | wife | None | California |
| 60 | Kathryn Burns | 15 | daughter | None | California |
| 61 | William P Swaim | 69 | Head | Baggageman | Ohio |
| 62 | Edna Swaim | 60 | wife | None | Indiana |
| 63 | Louis Swaim | 43 | son | Salesman | Indiana |
| 64 | Jennie Swaim | 47 | daughter | None | Pennsylvania |
| 65 | Hazel Swaim | 20 | granddaughter | Stenographer | California |
| 66 | John W Swaim | 14 | grandson | None | Arizona |
| 67 | Patrick J Carroll | 47 | Head | Molder | Ireland |
| 68 | Mary Carroll THIS PERSON | 20 | daughter | None | California |
| 69 | Matthew Carroll | 17 | son | Druggist | California |
| 70 | Kathryn Carroll | 15 | daughter | None | California |
| 71 | Thomas Carroll | 11 | son | None | California |
| 72 | Daniel Carroll | 9 | son | None | California |
| 73 | William Ulrich | 63 | Head | None | Kentucky |
| 74 | Pauline Ulrich | 60 | wife | None | Kentucky |
| 75 | Clara Ulrich | 19 | daughter | Typographer | California |
| 76 | Horace W Rothwell | 40 | Head | Merchant | Louisiana |
| 77 | Mary E Rothwell | 41 | wife | None | California |
| 78 | Webber Rothwell | 11 | son | None | California |
| 79 | Thomas Flynn | 45 | Head | Salesman | California |
| 80 | Elizabeth Flynn | 41 | wife | None | California |
| 81 | Kathryn Flynn | 4 | daughter | None | California |
| 82 | Jack H Flynn | 2 | son | None | California |
| 83 | Anetta Amado | 44 | Head | Merchant | Wisconsin |
| 84 | Anita Amado | 12 | daughter | None | California |
| 85 | Joseph Amado | 9 | son | None | Wisconsin |
| 86 | James Griffith | 42 | Head | Real Estate | Ireland |
| 87 | Elizabeth Griffith | 39 | wife | None | California |
| 88 | Elizabeth Griffith | 13 | daughter | None | California |
| 89 | Arthur E Smith | 59 | Head | Motorman | Canada |
| 90 | Louisa Smith | 49 | wife | None | England |
| 91 | Arthur V Smith | 20 | son | Musician | California |
| 92 | Herbert E Smith | 17 | son | None | California |
| 93 | Joseph B Welsh | 35 | Head | Plumber | California |
| 94 | Margaret Welsh | 32 | wife | Milliner | California |
| 95 | James Hall | 54 | Head | Foreman | England |
| 96 | Gussie Seydel | 50 | Housekeeper | Housekeeper | New York |
| 97 | John E Miller | 8 | Grandson | None | California |
| 98 | Mary Duffy | 65 | Head | None | Illinois |
| 99 | John W Duffy | 47 | son | None | Missouri |
| 100 | Edward L Duffy | 29 | son | Wire Chief | Illinois |
Pedigree Summary
Mary + 4 siblings
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)