MC
Mary Clarke — 1940 US Census Record
Linked across censuses1940 United States Federal Census · Marion-County, Indiana
Our Model Tree links this Mary Clarke across the 1930 and 1940 US Censuses in Marion-County, Indiana (XGBoost, ~Confirmed) — first a daughter (b.~1927), then head of a 11-person household.
Age 13
b. ~1927
Female
Daughter
Born: Indiana
Single
1940 Census Record Details
| Census Year | 1940 |
| Location | Marion-County, Indiana |
| Surname | Clarke |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Additional Details | |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
| Township / Ward | Indianapolis |
| Est. Birth Year | ~1927 |
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.
11 people recorded at the same address in the 1940 census.
| Name | Relation to head | Relative to Mary | Age | Birth yr |
|---|---|---|---|---|
| Kathleen Clarke | Daughter | — | 5 | ~1935 |
| Emma Clarke | Spouse | — | 31 | ~1909 |
| William Clarke | Son | — | 9 | ~1931 |
| Clayton Clarke | Head | — | 35 | ~1905 |
| William Reker | Other | — | 60 | ~1880 |
| Kenneth Clarke | Son | — | 1 | ~1939 |
| Clayton Clarke | Son | — | 7 | ~1933 |
| Billie Clarke | Daughter | — | 11 | ~1929 |
| Robert Clarke | Son | — | 3 | ~1937 |
| Helen Clarke | Daughter | — | 14 | ~1926 |
| Mary Clarke | Daughter | — | 13 | ~1927 |
Census Appearances
1930
Marion, Indiana
Daughter, age 3
Marion, Indiana · implied b. ~1927 — 5 household members
●
Primary link
· ~Confirmed · 2 sources
XGBoost
Household
| Surname | Clark |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 3 |
| Marital Status | Single |
| Birthplace | Indiana |
| Father's Birthplace | Indiana |
| Mother's Birthplace | Indiana |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
1940
Marion-County, Indiana
Daughter, age 13
Marion-County, Indiana · implied b. ~1927 — 11 household members
| Surname | Clarke |
| Given Name | Mary |
| Relationship to Head | Daughter |
| Sex | F |
| Color / Race | White |
| Age | 13 |
| Marital Status | Single |
| Birthplace | Indiana |
| 1935 Residence (City) | Indianapolis |
| 1935 Residence (County) | Marion |
| Highest Grade | No 7 |
| 1935 Residence | Same place |
| Birth State | Indiana |
| Birth Country | United States |
| Birthplace (normalized) | indiana |
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 Clarke across 2 US Census years (1930 and 1940) in 2 locations, using XGBoost record linkage.
Show:
This person
Anchor record
Mary Clarke
Daughter · 1940 · age 13 · b. ~1927 · Indiana
★ You are viewing this record
Sibling
Kathleen Clarke
Sibling · 1940 · age 5
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Kenneth Clarke
Sibling · 1940 · age 1
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Robert Clarke
Sibling · 1940 · age 3
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
William Clarke
Sibling · 1940 · age 9
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Billie Clarke
Sibling · 1940 · age 11
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Clayton Clarke
Sibling · 1940 · age 7
Source co-child of head (derived)
● Co-child · derived · ~0.88
Sibling
Helen Clarke
Sibling · 1940 · age 14
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 — Marion-County, Indiana
Open full size
1940 US Federal Census — Marion-County, Indiana
Page Contents
39 people indexed on this census page (nara:1940:m-t0627-01128-00376)
| Line | Name | Age | Relation | Occupation | Birthplace |
|---|---|---|---|---|---|
| 41 | Roy Harrison | 32 | Head | Inspector | Kentucky |
| 42 | Nellie Harrison | 30 | Wife | — | Kentucky |
| 43 | Roy Harrison | 9 | Son | — | Kentucky |
| 44 | Carl Bales | 40 | Lodger | Hog Counter | Indiana |
| 45 | Hazel Bales | 34 | Lodger | — | Indiana |
| 46 | Charles Yocum | 67 | Lodger | Truck Cleaner | Kentucky |
| 47 | Edward Andrews | 32 | Head | Grinder | Ohio |
| 48 | Albina Andrews | 32 | Wife | — | Canada |
| 49 | Edna Andrews | 11 | Daughter | — | Indiana |
| 50 | Barbara Andrews | 9 | Daughter | — | Indiana |
| 51 | Florence Andrews | 5 | Daughter | — | Indiana |
| 53 | George Huckelberry | 32 | Head | Packer | Indiana |
| 54 | Beulah Huckelberry | 33 | Wife | — | Indiana |
| 55 | Joyce Huckelberry | 10 | Daughter | — | Indiana |
| 56 | Eugene Murphy | 43 | Head | Labor | Illinois |
| 57 | Amelia Murphy | 70 | Mother | — | Illinois |
| 58 | William Murphy | 42 | Brother | Sealer | Illinois |
| 59 | Bruce Moore | 43 | Head | Truck Driver | Ohio |
| 60 | Mary Moore | 36 | Wife | — | Ohio |
| 61 | Gabriel Wiggins | 29 | Head | Sprayman | Indiana |
| 62 | Alberta Wiggins | 24 | Wife | — | Indiana |
| 63 | Lloyd Wiggins | 2 | Son | — | Indiana |
| 64 | Clayton Clarke | 35 | Head | Labor | Arkansas |
| 65 | Emma Clarke | 31 | Wife | — | Indiana |
| 66 | Helen Clarke | 14 | Daughter | — | Indiana |
| 67 | Mary Clarke THIS PERSON | 13 | Daughter | — | Indiana |
| 68 | Billie Dove Clarke | 11 | Daughter | — | Indiana |
| 69 | William Clarke | 9 | Son | — | Indiana |
| 70 | Clayton Burton Clarke | 7 | Son | — | Indiana |
| 71 | Kathleen Clarke | 5 | Daughter | — | Indiana |
| 72 | Robert Clarke | 3 | Son | — | Indiana |
| 73 | Kenneth Clarke | 1 | Son | — | Indiana |
| 74 | William Reker | 60 | Lodger | — | Germany |
| 75 | Carl Schmidt | 66 | Head | Carpenter | Germany |
| 76 | Nellie Marshall | 69 | Sister | Housekeeper | Indiana |
| 77 | Lawrence Mayes | 41 | Head | Bundler | Tennessee |
| 78 | Mary Ann Mayes | 40 | Wife | Folder | Tennessee |
| 79 | Helen Mayes | 23 | Daughter | — | Indiana |
| 80 | Carlean Mayes | 20 | Daughter | Boarder | Tennessee |
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)