MN
Mary Nolan — 1940 US Census Record
Linked across censuses1940 United States Federal Census · St.-Louis-City-County, Missouri
Our Model Tree links this Mary Nolan across the 1930 and 1940 US Censuses in St.-Louis-City-County, Missouri (XGBoost, ~Confirmed) — first a daughter (b.~1925), then head of a 10-person household.
Age 15
b. ~1925
Female
Daughter
Born: Missouri
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | St.-Louis-City-County, Missouri |
| Surname | Nolan |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | St. Louis City |
| 1935 Residence (County) | St. Louis City |
| Additional Details | |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
| Township / Ward | St Louis City |
| Est. Birth Year | ~1925 |
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 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Judith Nolan | Daughter | — | 2 | ~1938 |
| Mary Nolan | Daughter | — | 15 | ~1925 |
| Audrey Nolan | Daughter | — | 19 | ~1921 |
| Patricia Nolan | Daughter | — | 13 | ~1927 |
| Joseph Nolan | Head | — | 43 | ~1897 |
| Mary Nolan | Other | — | 75 | ~1865 |
| Thomas Nolan | Son | — | 18 | ~1922 |
| John Nolan | Son | — | 10 | ~1930 |
| Jean Nolan | Son | — | 16 | ~1924 |
| Agnes Nolan | Spouse | — | 42 | ~1898 |
Census Appearances
1930
St Louis, …
Daughter, age 5
St Louis, Missouri · implied b. ~1925 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Nolan |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 5 |
| Marital Status | Single |
| Birthplace | Missouri |
| Father's Birthplace | Ohio |
| Mother's Birthplace | Illinois |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
1940
St.-Louis-City-County, Missouri
Daughter, age 15
St.-Louis-City-County, Missouri · implied b. ~1925 — 10 household members
| Surname | Nolan |
| Given Name | Mary Ann |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 15 |
| Marital Status | Single |
| Birthplace | Missouri |
| 1935 Residence (City) | St. Louis City |
| 1935 Residence (County) | St. Louis City |
| Income (1939) | 0 |
| Highest Grade | Hs 4 |
| 1935 Residence | Same place |
| Birth State | Missouri |
| Birth Country | United States |
| Birthplace (normalized) | missouri |
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 Nolan across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Nolan
Daughter · 1940 · age 15 · b. ~1925 · Missouri
★ You are viewing this record
Sibling
Patricia Nolan
Sibling · 1940 · age 13
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
John Nolan
Sibling · 1940 · age 10
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Judith Nolan
Sibling · 1940 · age 2
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Thomas Nolan
Sibling · 1940 · age 18
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Audrey Nolan
Sibling · 1940 · age 19
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Jean Nolan
Sibling · 1940 · age 16
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
1940 US Federal Census — St.-Louis-City-County, Missouri
Open full size
1940 US Federal Census — St.-Louis-City-County, Missouri
Page Contents
19 people indexed on this census page (nara:1940:m-t0627-02193-00231)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | John F. Fisher | 33 | Head | Relief Driver | Missouri |
| 42 | Beatrice Fisher | 32 | Wife | — | Missouri |
| 43 | Hermon Smallwood | 30 | Head | File Setter | Arkansas |
| 44 | Marguerite Smallwood | 23 | Wife | — | Missouri |
| 45 | George Lorach | 68 | Head | Proprietor | Germany |
| 46 | Minnie Lorach | 68 | Wife | Sales Lady | Germany |
| 47 | Joseph J. Nolan | 43 | Head | Proprietor | Missouri |
| 48 | Agnes B. Nolan | 42 | Wife | — | Missouri |
| 49 | Audrey M. Nolan | 19 | Daughter | New Worker | Missouri |
| 50 | Thomas J. Nolan | 18 | Son | — | Missouri |
| 51 | Jean V. Nolan | 16 | Son | — | Missouri |
| 52 | Mary Ann Nolan THIS PERSON | 15 | Daughter | — | Missouri |
| 53 | Patricia L. Nolan | 13 | Daughter | — | Missouri |
| 54 | John G. Nolan | 10 | Son | — | Missouri |
| 55 | Judith S. Nolan | 2 | Daughter | — | Missouri |
| 56 | Mary A. Nolan | 75 | Mother | — | Missouri |
| 57 | Anna Novosel | 50 | Head | Proprietor | Jugoslavia |
| 58 | Peter Novosel | 32 | Son | Clerk | Missouri |
| 59 | Julia Novosel | 29 | Daughter | Secretary | Missouri |
About This Record & Model Tree
This record was independently indexed by YourRoots from the 1940 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)