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Mary Larson — 1920 US Census Record
Model Tree available1920 United States Federal Census · Rock Island, Illinois
Our Model Tree links this Mary Larson across the 1900, 1910 and 1920 US Censuses in Rock Island, Illinois (XGBoost, ~Confirmed), with identified parents John & John — first a daughter (b.~1877), then head of a 4-person household.
Age 43
b. ~1877
Female
Daughter
Born: Sweden
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | Rock Island, Illinois |
| Surname | Larson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Sweden |
| Year of Immigration | 1871 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Additional Details | |
| Occupation | Stenographer |
| Industry | Court House |
| Class of Worker | S |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Year of Naturalization | 1877 |
| Birthplace (normalized) | sweden |
| Occupation | Stenographer |
| Township / Ward | Moline City |
| Est. Birth Year | ~1877 |
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.
4 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Mary Larson | Daughter | — | 43 | ~1877 |
| John Larson | Head | — | 73 | ~1847 |
| John Larson | Son | — | 44 | ~1876 |
| Wilhelmina Larson | Spouse | — | 65 | ~1855 |
Census Appearances
1900
Rock Island, …
Daughter, age 24
Rock Island, Illinois · implied b. ~1876 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 23 |
| Marital Status | Single |
| Birthplace | Sweden |
| Birth Month | Sept |
| Birth Year | 1876 |
| Year of Immigration | 1880 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Dressmaker |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1910
Rock Island, …
Daughter, age 33
Rock Island, Illinois · implied b. ~1877 — 4 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Larson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 33 |
| Marital Status | Single |
| Birthplace | Sweden |
| Year of Immigration | 1881 |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Stenographer |
| Industry | Real Estate Office |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth Country | Sweden |
| Birthplace (normalized) | sweden |
1920
Rock Island, …
Daughter, age 43
Rock Island, Illinois · implied b. ~1877 — 4 household members
| Surname | Larson |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 43 |
| Marital Status | Single |
| Birthplace | Sweden |
| Year of Immigration | 1871 |
| Naturalization Status | Naturalized |
| Father's Birthplace | Sweden |
| Mother's Birthplace | Sweden |
| Occupation | Stenographer |
| Industry | Court House |
| Class of Worker | S |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Mother Tongue | Swedish |
| Birth Country | Sweden |
| Year of Naturalization | 1877 |
| Birthplace (normalized) | sweden |
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 Larson across 3 US Census years (1900, 1910 and 1920) in Rock Island, Illinois, using XGBoost record linkage. Identified parents: father John Larson (~0.92 confidence) and father John Larson (~0.92 confidence) and father John Larson (~0.92 confidence) and mother Wilhelmina Larson (~0.92 confidence). The pedigree spans 1 generation with 4 identified ancestors.
Show:
Gen 1
Parents
confidence ≈ 0.92
Father
John Larson
b. ~1846
Source father
● Household
· direct · ~0.92
Father
John Larson
b. ~1846
Source father
● Household
· direct · ~0.92
Father
John Larson
b. ~1847
Source father
● Household
· direct · ~0.92
Mother
Wilhelmina Larson
b. ~1855
Source mother
● Household
· direct · ~0.92
This person
Anchor record
Mary Larson
Daughter · 1920 · age 43 · b. ~1877 · Illinois
★ You are viewing this record
Sibling
John Larson
Sibling · 1920 · age 44
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 — Rock Island, Illinois
Open full size
1920 US Federal Census — Rock Island, Illinois
Page Contents
50 people indexed on this census page (ia:1920:14thcensusofpopu402unit:0314)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 51 | Elsie Schaible | 17 | Daughter | Stenographer | Illinois |
| 52 | Catherine Schaible | 11 | Daughter | — | Illinois |
| 53 | James Schaible | 6 | Son | — | Illinois |
| 54 | Jane Schaible | 6 | Daughter | — | Illinois |
| 55 | Lillian Thomsen | 25 | Sister-in-law | Stenographer | Illinois |
| 56 | Oscar L. Carlmark | 41 | Head | Employment Agent | Sweden |
| 57 | Hattie Carlmark | 40 | Wife | — | Illinois |
| 58 | Mildred Carlmark | 16 | Daughter | — | Illinois |
| 59 | Clifford Carlmark | 12 | Son | — | Illinois |
| 60 | Olaf J. Roose | 64 | Head | Retired | Sweden |
| 61 | Sophia Roose | 55 | Wife | — | Sweden |
| 62 | William B. Slater | 42 | Head | Minister | Ohio |
| 63 | Hattie Slater | 39 | Wife | — | Tennessee |
| 64 | Roland Slater | 19 | Son | — | Ohio |
| 65 | Paul Slater | 16 | Son | — | Ohio |
| 66 | William H. Slater | 7 | Son | — | Illinois |
| 67 | Martin J. Anderson | 34 | Head | Draftsman | Illinois |
| 68 | Edith Anderson | 33 | Wife | — | Illinois |
| 69 | Merrill J. Anderson | 4 | Son | — | Illinois |
| 70 | Willard L. Anderson | 1 | Son | — | Illinois |
| 71 | Anna Johnston | 60 | Mother-in-law | — | Sweden |
| 72 | Nels Danielson | 71 | Head | — | England |
| 73 | Blanche Danielson | 39 | Daughter | Stenographer | Illinois |
| 74 | William H. Adams | 55 | Head | Retired | Illinois |
| 75 | Emma Adams | 54 | Wife | — | Illinois |
| 76 | Charles P. Adams | 16 | Son | — | Illinois |
| 77 | Alice Adams | 14 | Daughter | — | Illinois |
| 78 | William H. Jr. Adams | 12 | Son | — | Illinois |
| 79 | Moses Hastings | 53 | Head | Clerk | Pennsylvania |
| 80 | Elizabeth Hastings | 47 | Wife | — | Canada |
| 81 | Lucille Hastings | 21 | Daughter | — | Ohio |
| 82 | Anne Crouser | 73 | Mother-in-law | — | Canada |
| 83 | George Kiefer | 11 | Nephew | — | Ohio |
| 84 | Ezra Bohner | 41 | Head | Manager | Ohio |
| 85 | Lucille Bohner | 40 | Sister-in-law | — | Canada |
| 86 | Anne Bohner | 19 | Daughter | — | Ohio |
| 87 | Ezra Jr. Bohner | 9 | Nephew | — | Mich. |
| 88 | Elizabeth Bohner | 7 | Niece | — | Illinois |
| 89 | Amos Wilbur Donahue | 60 | Head | Traffic Cop | Illinois |
| 90 | Eliza Jane Donahue | 56 | Wife | — | Illinois |
| 91 | Archie Donahue | 57 | Head | Operator | Illinois |
| 92 | Minnie Donahue | 50 | Wife | — | Illinois |
| 93 | John F. Larson | 73 | Head | — | Sweden |
| 94 | Wilhelmina Larson | 65 | Wife | — | Sweden |
| 95 | John Larson | 44 | Son | Foreman | Sweden |
| 96 | Mary Larson THIS PERSON | 43 | Daughter | Stenographer | Sweden |
| 97 | Olaf J. Thorpe | 69 | Head | Painter | Norway |
| 98 | Annette Thorpe | 66 | Wife | — | Norway |
| 99 | Theodore Thorpe | 27 | Son | Trimmer | Illinois |
| 100 | Edward Thorpe | 18 | Grandson | Electrician | Illinois |
Related Census Records
Pedigree Summary
Mary + 1 sibling
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)