MS
Mary Shannon — 1920 US Census Record
Linked across censuses1920 United States Federal Census · St Clair, Illinois
Our Model Tree links this Mary Shannon across the 1910 and 1920 US Censuses in St Clair, Illinois (XGBoost, ~Confirmed) — first a daughter (b.~1903), then head of a 10-person household.
Age 17
b. ~1903
Female
Daughter
Born: Illinois
Single
1920 Census Record Details
| Census Year | 1920 |
| Location | St Clair, Illinois |
| Surname | Shannon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Additional Details | |
| Occupation | Shipping Clerk |
| Industry | Dry Goods Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
| Occupation | Shipping Clerk |
| Township / Ward | East St Louis |
| Est. Birth Year | ~1903 |
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.
10 people recorded at the same address in the 1920 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Lorene Shannon | Daughter | — | 17 | ~1903 |
| Edward Shannon | Son | — | 21 | ~1899 |
| Margaret Shannon | Spouse | — | 43 | ~1877 |
| Edward Shannon | Head | — | 50 | ~1870 |
| Margaret Shannon | Daughter | — | 6 | ~1914 |
| Robert Shannon | Son | — | 13 | ~1907 |
| Mary Shannon | Daughter | — | 17 | ~1903 |
| Lucille Shannon | Daughter | — | 1 | ~1919 |
| Nellie Shannon | Daughter | — | 15 | ~1905 |
| Thelma Shannon | Daughter | — | 10 | ~1910 |
Census Appearances
1910
St Clair, …
Daughter, age 7
St Clair, Illinois · implied b. ~1903 — 8 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Shannon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 7 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | English |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
1920
St Clair, …
Daughter, age 17
St Clair, Illinois · implied b. ~1903 — 10 household members
| Surname | Shannon |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 17 |
| Marital Status | Single |
| Birthplace | Illinois |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Occupation | Shipping Clerk |
| Industry | Dry Goods Co |
| Class of Worker | W |
| Can Read | Yes |
| Can Write | Yes |
| Speaks English | Yes |
| Birth State | Illinois |
| Birth Country | United States |
| Birthplace (normalized) | illinois |
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 Shannon across 2 US Census years (1910 and 1920) in St Clair, Illinois, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Shannon
Daughter · 1920 · age 17 · b. ~1903 · Illinois
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Sibling
Lucille Shannon
Sibling · 1920 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Edward Shannon
Sibling · 1920 · age 21
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Nellie Shannon
Sibling · 1920 · age 15
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Shannon
Sibling · 1920 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Lorene Shannon
Sibling · 1920 · age 17
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thelma Shannon
Sibling · 1920 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Margaret Shannon
Sibling · 1920 · age 6
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:1920:14thcensusofpopu404unit:0482)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 1 | Fred Kayser | 66 | Head | Cigar Maker | Germany |
| 2 | Alvina Kayser | 55 | Wife | — | Germany |
| 3 | Edward L. Sympson | 45 | Head | Carpenter | Illinois |
| 4 | Dora E. Sympson | 37 | Wife | — | Illinois |
| 5 | Ola Sympson | 18 | Daughter | — | Illinois |
| 6 | Mable M. Sympson | 15 | Daughter | — | Illinois |
| 7 | Ruth L. Sympson | 3 | Daughter | — | Illinois |
| 8 | Gus Schwerbert | 36 | Head | Grocer | Missouri |
| 9 | Emma E. Schwerbert | 39 | Wife | — | Illinois |
| 10 | Edward Shannon | 50 | Head | Checker | Ohio |
| 11 | Margaret Shannon | 43 | Wife | — | Illinois |
| 12 | Edward Shannon | 21 | Son | Sign Painter | Illinois |
| 13 | Lorene Shannon | 17 | Daughter | Stenographer | Illinois |
| 14 | Mary Shannon THIS PERSON | 17 | Daughter | Shipping Clerk | Illinois |
| 15 | Nellie Shannon | 15 | Daughter | Telegrapher | Illinois |
| 16 | Robert Shannon | 13 | Son | — | Illinois |
| 17 | Thelma Shannon | 10 | Daughter | — | Illinois |
| 18 | Margaret Shannon | 6 | Daughter | — | Illinois |
| 19 | Lucille Shannon | 1 | Daughter | — | Illinois |
| 20 | Hannah Houston | 45 | Head | Janitress | Illinois |
| 21 | Florence Houston | 17 | Daughter | Biller | Illinois |
| 22 | James Houston | 14 | Son | — | Illinois |
| 23 | Charles Johnson | 56 | Head | — | Kentucky |
| 24 | Mary J. Johnson | 47 | Wife | — | Illinois |
| 25 | Clyde Arnold | 26 | Head | Switchman | Indiana |
| 26 | Verna Arnold | 19 | Wife | — | Indiana |
| 27 | Robert J. Sayers | 20 | Boarder | — | Illinois |
| 28 | Hazel B. Sayers | 17 | Boarder | — | Indiana |
| 29 | Robert Sr. Sayers | 73 | Boarder | — | Illinois |
| 30 | Flora V. Murray | 51 | Boarder | Cotton Maker | Indiana |
| 31 | James Murray | 15 | Boarder | — | Indiana |
| 32 | George A. Lane | 38 | Head | Salesman | Illinois |
| 33 | Eugene F. Lane | 13 | Son | — | Illinois |
| 34 | Mable V. Lane | 9 | Daughter | — | Illinois |
| 35 | Martin M. Heather | 64 | Head | Plumber | Illinois |
| 36 | Amanda Heather | 60 | Wife | Seamstress | Kentucky |
| 37 | Jesse P. Baumfield | 68 | Head | Watchman | Kentucky |
| 38 | Nannie J. Baumfield | 59 | Wife | — | Missouri |
| 39 | William D. Tuggle | 30 | Head | Insurance | Illinois |
| 40 | Marie J. Tuggle | 25 | Wife | — | Illinois |
| 41 | Helen Tuggle | 4 | Daughter | — | Illinois |
| 42 | James E. Moss | 31 | Head | Fireman | Missouri |
| 43 | Josephine Moss | 26 | Wife | — | Illinois |
| 44 | Evelyn Moss | 7 | Daughter | — | Missouri |
| 45 | Lillian Moss | 4 | Daughter | — | Illinois |
| 46 | John Osthoff | 42 | Head | Switchman | Illinois |
| 47 | Agnes Osthoff | 34 | Wife | Stamper | Illinois |
| 48 | Alice Osthoff | 14 | Daughter | — | Illinois |
| 49 | Irvin Osthoff | 8 | Son | — | Illinois |
| 50 | Osthoff | None | — | — | Illinois |
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)